Add m-esr52 at 52.6.0

71 files changed, 2358 insertions, 0 deletions

diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A1.js
new file mode 100644
index 000000000..6e4793095
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A1.js
@@ -0,0 +1,60 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * White Space and Line Terminator between AdditiveExpression and "+" or between "+" and MultiplicativeExpression are allowed
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A1.js
+ * @description Checking by using eval
+ */
+
+//CHECK#1
+if (eval("1\u0009+\u00091") !== 2) {
+  $ERROR('#1: 1\\u0009+\\u00091 === 2');
+}
+
+//CHECK#2
+if (eval("1\u000B+\u000B1") !== 2) {
+  $ERROR('#2: 1\\u000B+\\u000B1 === 2');  
+}
+
+//CHECK#3
+if (eval("1\u000C+\u000C1") !== 2) {
+  $ERROR('#3: 1\\u000C+\\u000C1 === 2');
+}
+
+//CHECK#4
+if (eval("1\u0020+\u00201") !== 2) {
+  $ERROR('#4: 1\\u0020+\\u00201 === 2');
+}
+
+//CHECK#5
+if (eval("1\u00A0+\u00A01") !== 2) {
+  $ERROR('#5: 1\\u00A0+\\u00A01 === 2');
+}
+
+//CHECK#6
+if (eval("1\u000A+\u000A1") !== 2) {
+  $ERROR('#6: 1\\u000A+\\u000A1 === 2');  
+}
+
+//CHECK#7
+if (eval("1\u000D+\u000D1") !== 2) {
+  $ERROR('#7: 1\\u000D+\\u000D1 === 2');
+}
+
+//CHECK#8
+if (eval("1\u2028+\u20281") !== 2) {
+  $ERROR('#8: 1\\u2028+\\u20281 === 2');
+}
+
+//CHECK#9
+if (eval("1\u2029+\u20291") !== 2) {
+  $ERROR('#9: 1\\u2029+\\u20291 === 2');
+}
+
+//CHECK#10
+if (eval("1\u0009\u000B\u000C\u0020\u00A0\u000A\u000D\u2028\u2029+\u0009\u000B\u000C\u0020\u00A0\u000A\u000D\u2028\u20291") !== 2) {
+  $ERROR('#10: 1\\u0009\\u000B\\u000C\\u0020\\u00A0\\u000A\\u000D\\u2028\\u2029+\\u0009\\u000B\\u000C\\u0020\\u00A0\\u000A\\u000D\\u2028\\u20291 === 2');
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T1.js
new file mode 100644
index 000000000..748f791fa
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T1.js
@@ -0,0 +1,43 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x + y uses GetValue
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.1_T1.js
+ * @description Either Type is not Reference or GetBase is not null
+ */
+
+//CHECK#1
+if (1 + 1 !== 2) {
+  $ERROR('#1: 1 + 1 === 2. Actual: ' + (1 + 1));
+}
+
+//CHECK#2
+var x = 1;
+if (x + 1 !== 2) {
+  $ERROR('#2: var x = 1; x + 1 === 2. Actual: ' + (x + 1));
+}
+
+//CHECK#3
+var y = 1;
+if (1 + y !== 2) {
+  $ERROR('#3: var y = 1; 1 + y === 2. Actual: ' + (1 + y));
+}
+
+//CHECK#4
+var x = 1;
+var y = 1;
+if (x + y !== 2) {
+  $ERROR('#4: var x = 1; var y = 1; x + y === 2. Actual: ' + (x + y));
+}
+
+//CHECK#5
+var objectx = new Object();
+var objecty = new Object();
+objectx.prop = 1;
+objecty.prop = 1;
+if (objectx.prop + objecty.prop !== 2) {
+  $ERROR('#5: var objectx = new Object(); var objecty = new Object(); objectx.prop = 1; objecty.prop = 1; objectx.prop + objecty.prop === 2. Actual: ' + (objectx.prop + objecty.prop));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T2.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T2.js
new file mode 100644
index 000000000..8a790be9f
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T2.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x + y uses GetValue
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.1_T2.js
+ * @description If GetBase(x) is null, throw ReferenceError
+ */
+
+//CHECK#1
+try {
+  x + 1;
+  $ERROR('#1.1: x + 1 throw ReferenceError. Actual: ' + (x + 1));  
+}
+catch (e) {
+  if ((e instanceof ReferenceError) !== true) {
+    $ERROR('#1.2: x + 1 throw ReferenceError. Actual: ' + (e));  
+  }
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T3.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T3.js
new file mode 100644
index 000000000..6609a5593
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.1_T3.js
@@ -0,0 +1,22 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x + y uses GetValue
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.1_T3.js
+ * @description If GetBase(y) is null, throw ReferenceError
+ */
+
+//CHECK#1
+try {
+  1 + y;
+  $ERROR('#1.1: 1 + y throw ReferenceError. Actual: ' + (1 + y));  
+}
+catch (e) {
+  if ((e instanceof ReferenceError) !== true) {
+    $ERROR('#1.2: 1 + y throw ReferenceError. Actual: ' + (e));  
+  }
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T1.js
new file mode 100644
index 000000000..debdcd883
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T1.js
@@ -0,0 +1,71 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x + y uses [[Default Value]]
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.2_T1.js
+ * @description If Type(value) is Object, evaluate ToPrimitive(value, Number)
+ */
+
+//CHECK#1
+if ({valueOf: function() {return 1}} + 1 !== 2) {
+  $ERROR('#1: {valueOf: function() {return 1}} + 1 === 2. Actual: ' + ({valueOf: function() {return 1}} + 1));
+}
+
+//CHECK#2
+if ({valueOf: function() {return 1}, toString: function() {return 0}} + 1 !== 2) {
+  $ERROR('#2: {valueOf: function() {return 1}, toString: function() {return 0}} + 1 === 2. Actual: ' + ({valueOf: function() {return 1}, toString: function() {return 0}} + 1));
+}
+
+//CHECK#3
+if ({valueOf: function() {return 1}, toString: function() {return {}}} + 1 !== 2) {
+  $ERROR('#3: {valueOf: function() {return 1}, toString: function() {return {}}} + 1 === 2. Actual: ' + ({valueOf: function() {return 1}, toString: function() {return {}}} + 1));
+}
+
+//CHECK#4
+try {
+  if ({valueOf: function() {return 1}, toString: function() {throw "error"}} + 1 !== 2) {
+    $ERROR('#4.1: {valueOf: function() {return 1}, toString: function() {throw "error"}} + 1 === 2. Actual: ' + ({valueOf: function() {return 1}, toString: function() {throw "error"}} + 1));
+  }
+}
+catch (e) {
+  if (e === "error") {
+    $ERROR('#4.2: {valueOf: function() {return 1}, toString: function() {throw "error"}} + 1 not throw "error"');
+  } else {
+    $ERROR('#4.3: {valueOf: function() {return 1}, toString: function() {throw "error"}} + 1 not throw Error. Actual: ' + (e));
+  }
+}
+
+//CHECK#5
+if (1 + {toString: function() {return 1}} !== 2) {
+  $ERROR('#5: 1 + {toString: function() {return 1}} === 2. Actual: ' + (1 + {toString: function() {return 1}}));
+}
+
+//CHECK#6
+if (1 + {valueOf: function() {return {}}, toString: function() {return 1}} !== 2) {
+  $ERROR('#6: 1 + {valueOf: function() {return {}}, toString: function() {return 1}} === 2. Actual: ' + (1 + {valueOf: function() {return {}}, toString: function() {return 1}}));
+}
+
+//CHECK#7
+try {
+  1 + {valueOf: function() {throw "error"}, toString: function() {return 1}};
+  $ERROR('#7.1: 1 + {valueOf: function() {throw "error"}, toString: function() {return 1}} throw "error". Actual: ' + (1 + {valueOf: function() {throw "error"}, toString: function() {return 1}}));
+}  
+catch (e) {
+  if (e !== "error") {
+    $ERROR('#7.2: 1 + {valueOf: function() {throw "error"}, toString: function() {return 1}} throw "error". Actual: ' + (e));
+  } 
+}
+
+//CHECK#8
+try {
+  1 + {valueOf: function() {return {}}, toString: function() {return {}}};
+  $ERROR('#8.1: 1 + {valueOf: function() {return {}}, toString: function() {return {}}} throw TypeError. Actual: ' + (1 + {valueOf: function() {return {}}, toString: function() {return {}}}));
+}  
+catch (e) {
+  if ((e instanceof TypeError) !== true) {
+    $ERROR('#8.2: 1 + {valueOf: function() {return {}}, toString: function() {return {}}} throw TypeError. Actual: ' + (e));
+  } 
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T2.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T2.js
new file mode 100644
index 000000000..732c32cc8
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T2.js
@@ -0,0 +1,35 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x + y uses [[Default Value]]
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.2_T2.js
+ * @description If Type(value) is Date object, evaluate ToPrimitive(value, String)
+ */
+
+//CHECK#1
+var date = new Date();
+if (date + date !== date.toString() + date.toString()) {
+  $ERROR('#1: var date = new Date(); date + date === date.toString() + date.toString(). Actual: ' + (date + date));  
+}
+
+//CHECK#2
+var date = new Date();
+if (date + 0 !== date.toString() + "0") {
+  $ERROR('#2: var date = new Date(); date + 0 === date.toString() + "0". Actual: ' + (date + 0));  
+}
+
+//CHECK#3
+var date = new Date();
+if (date + true !== date.toString() + "true") {
+  $ERROR('#3: var date = new Date(); date + true === date.toString() + "true". Actual: ' + (date + true));  
+}
+
+//CHECK#4
+var date = new Date();
+if (date + new Object() !== date.toString() + "[object Object]") {
+  $ERROR('#4: var date = new Date(); date + new Object() === date.toString() + "[object Object]". Actual: ' + (date + new Object()));  
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T3.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T3.js
new file mode 100644
index 000000000..965c53d4d
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.2_T3.js
@@ -0,0 +1,46 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x + y uses [[Default Value]]
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.2_T3.js
+ * @description If Type(value) is Function, evaluate ToPrimitive(value, Number)
+ */
+
+//CHECK#1
+function f1(){
+  return 0;
+}
+if (f1 + 1 !== f1.toString() + 1) {
+  $ERROR('#1: function f1() {return 0;}; f1 + 1 === f1.toString() + 1');
+}
+
+//CHECK#2
+function f2(){
+  return 0;
+}
+f2.valueOf = function() {return 1;};
+if (1 + f2 !== 1 + 1) {
+  $ERROR('#2: f1unction f2() {return 0;} f2.valueOf = function() {return 1;}; 1 + f2 === 1 + 1. Actual: ' + (1 + f2));
+}
+
+//CHECK#3
+function f3(){
+  return 0;
+}
+f3.toString = function() {return 1;};
+if (1 + f3 !== 1 + 1) {
+  $ERROR('#3: f1unction f3() {return 0;} f3.toString() = function() {return 1;}; 1 + f3 === 1 + 1. Actual: ' + (1 + f3));
+}
+
+//CHECK#4
+function f4(){
+  return 0;
+}
+f4.valueOf = function() {return -1;};
+f4.toString = function() {return 1;};
+if (f4 + 1 !== 1 - 1) {
+  $ERROR('#4: f1unction f4() {return 0;}; f2.valueOf = function() {return -1;}; f4.toString() = function() {return 1;}; f4 + 1 === 1 - 1. Actual: ' + (f4 + 1));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.3_T1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.3_T1.js
new file mode 100644
index 000000000..07f11d4a1
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.3_T1.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * ToNumber(first expression) is called first, and then ToNumber(second expression)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.3_T1.js
+ * @description Checking with "throw"
+ */
+
+//CHECK#1
+var x = { valueOf: function () { throw "x"; } };
+var y = { valueOf: function () { throw "y"; } };
+try {
+   x + y;
+   $ERROR('#1.1: var x = { valueOf: function () { throw "x"; } }; var y = { valueOf: function () { throw "y"; } }; x + y throw "x". Actual: ' + (x + y));
+} catch (e) {
+   if (e === "y") {
+     $ERROR('#1.2: ToNumber(first expression) is called first, and then ToNumber(second expression)');
+   } else {
+     if (e !== "x") {
+       $ERROR('#1.3: var x = { valueOf: function () { throw "x"; } }; var y = { valueOf: function () { throw "y"; } }; x + y throw "x". Actual: ' + (e));
+     }
+   }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T1.js
new file mode 100644
index 000000000..ad6f74b40
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T1.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * First expression is evaluated first, and then second expression
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.4_T1.js
+ * @description Checking with "="
+ */
+
+//CHECK#1
+var x = 0; 
+if ((x = 1) + x !== 2) {
+  $ERROR('#1: var x = 0; (x = 1) + x === 2. Actual: ' + ((x = 1) + x));
+}
+
+//CHECK#2
+var x = 0; 
+if (x + (x = 1) !== 1) {
+  $ERROR('#2: var x = 0; x + (x = 1) === 1. Actual: ' + (x + (x = 1)));
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T2.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T2.js
new file mode 100644
index 000000000..349041ed4
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T2.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * First expression is evaluated first, and then second expression
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.4_T2.js
+ * @description Checking with "throw"
+ */
+
+//CHECK#1
+var x = function () { throw "x"; };
+var y = function () { throw "y"; };
+try {
+   x() + y();
+   $ERROR('#1.1: var x = function () { throw "x"; }; var y = function () { throw "y"; }; x() + y() throw "x". Actual: ' + (x() + y()));
+} catch (e) {
+   if (e === "y") {
+     $ERROR('#1.2: First expression is evaluated first, and then second expression');
+   } else {
+     if (e !== "x") {
+       $ERROR('#1.3: var x = function () { throw "x"; }; var y = function () { throw "y"; }; x() + y() throw "x". Actual: ' + (e));
+     }
+   }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T3.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T3.js
new file mode 100644
index 000000000..60d89e506
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A2.4_T3.js
@@ -0,0 +1,27 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * First expression is evaluated first, and then second expression
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A2.4_T3.js
+ * @description Checking with undeclarated variables
+ */
+
+//CHECK#1
+try {
+  x + (x = 1);
+  $ERROR('#1.1: x + (x = 1) throw ReferenceError. Actual: ' + (x + (x = 1)));  
+}
+catch (e) {
+  if ((e instanceof ReferenceError) !== true) {
+    $ERROR('#1.2: x + (x = 1) throw ReferenceError. Actual: ' + (e));  
+  }
+}
+
+//CHECK#2
+if ((y = 1) + y !== 2) {
+  $ERROR('#2: (y = 1) + y === 2. Actual: ' + ((y = 1) + y));
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.1.js
new file mode 100644
index 000000000..e0f9656dd
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.1.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T1.1.js
+ * @description Type(Primitive(x)) and Type(Primitive(y)) vary between primitive boolean and Boolean object
+ */
+
+//CHECK#1
+if (true + true !== 2) {
+  $ERROR('#1: true + true === 2. Actual: ' + (true + true));
+}
+
+//CHECK#2
+if (new Boolean(true) + true !== 2) {
+  $ERROR('#2: new Boolean(true) + true === 2. Actual: ' + (new Boolean(true) + true));
+}
+
+//CHECK#3
+if (true + new Boolean(true) !== 2) {
+  $ERROR('#3: true + new Boolean(true) === 2. Actual: ' + (true + new Boolean(true)));
+}
+
+//CHECK#4
+if (new Boolean(true) + new Boolean(true) !== 2) {
+  $ERROR('#4: new Boolean(true) + new Boolean(true) === 2. Actual: ' + (new Boolean(true) + new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.2.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.2.js
new file mode 100644
index 000000000..f5fccb105
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.2.js
@@ -0,0 +1,31 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T1.2.js
+ * @description Type(Primitive(x)) and Type(Primitive(y)) vary between primitive number and Number object
+ */
+
+//CHECK#1
+if (1 + 1 !== 2) {
+  $ERROR('#1: 1 + 1 === 2. Actual: ' + (1 + 1));
+}
+
+//CHECK#2
+if (new Number(1) + 1 !== 2) {
+  $ERROR('#2: new Number(1) + 1 === 2. Actual: ' + (new Number(1) + 1));
+}
+
+//CHECK#3
+if (1 + new Number(1) !== 2) {
+  $ERROR('#3: 1 + new Number(1) === 2. Actual: ' + (1 + new Number(1)));
+}
+
+//CHECK#4
+if (new Number(1) + new Number(1) !== 2) {
+  $ERROR('#4: new Number(1) + new Number(1) === 2. Actual: ' + (new Number(1) + new Number(1)));
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.3.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.3.js
new file mode 100644
index 000000000..c9d52e593
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T1.3.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T1.3.js
+ * @description Type(Primitive(x)) and Type(Primitive(y)) vary between Null and Undefined
+ */
+
+//CHECK#1
+if (isNaN(null + undefined) !== true) {
+  $ERROR('#1: null + undefined === Not-a-Number. Actual: ' + (null + undefined));
+}
+
+//CHECK#2
+if (isNaN(undefined + null) !== true) {
+  $ERROR('#2: undefined + null === Not-a-Number. Actual: ' + (undefined + null));
+}
+
+//CHECK#3
+if (isNaN(undefined + undefined) !== true) {
+  $ERROR('#3: undefined + undefined === Not-a-Number. Actual: ' + (undefined + undefined));
+}
+
+//CHECK#4
+if (null + null !== 0) {
+  $ERROR('#4: null + null === 0. Actual: ' + (null + null));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.1.js
new file mode 100644
index 000000000..e5e3ee261
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.1.js
@@ -0,0 +1,50 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T2.1.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between Number (primitive or object) or Boolean (primitive and object)
+ */
+
+//CHECK#1
+if (true + 1 !== 2) {
+  $ERROR('#1: true + 1 === 2. Actual: ' + (true + 1));
+}
+
+//CHECK#2
+if (1 + true !== 2) {
+  $ERROR('#2: 1 + true === 2. Actual: ' + (1 + true));
+}
+
+//CHECK#3
+if (new Boolean(true) + 1 !== 2) {
+  $ERROR('#3: new Boolean(true) + 1 === 2. Actual: ' + (new Boolean(true) + 1));
+}
+
+//CHECK#4
+if (1 + new Boolean(true) !== 2) {
+  $ERROR('#4: 1 + new Boolean(true) === 2. Actual: ' + (1 + new Boolean(true)));
+}
+
+//CHECK#5
+if (true + new Number(1) !== 2) {
+  $ERROR('#5: true + new Number(1) === 2. Actual: ' + (true + new Number(1)));
+}
+
+//CHECK#6
+if (new Number(1) + true !== 2) {
+  $ERROR('#6: new Number(1) + true === 2. Actual: ' + (new Number(1) + true));
+}
+
+//CHECK#7
+if (new Boolean(true) + new Number(1) !== 2) {
+  $ERROR('#7: new Boolean(true) + new Number(1) === 2. Actual: ' + (new Boolean(true) + new Number(1)));
+}
+
+//CHECK#8
+if (new Number(1) + new Boolean(true) !== 2) {
+  $ERROR('#8: new Number(1) + new Boolean(true) === 2. Actual: ' + (new Number(1) + new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.2.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.2.js
new file mode 100644
index 000000000..ec9dff926
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.2.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T2.2.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between Number (primitive or object) and Null
+ */
+
+//CHECK#1
+if (1 + null !== 1) {
+  $ERROR('#1: 1 + null === 1. Actual: ' + (1 + null));
+}
+
+//CHECK#2
+if (null + 1 !== 1) {
+  $ERROR('#2: null + 1 === 1. Actual: ' + (null + 1));
+}
+
+//CHECK#3
+if (new Number(1) + null !== 1) {
+  $ERROR('#3: new Number(1) + null === 1. Actual: ' + (new Number(1) + null));
+}
+
+//CHECK#4
+if (null + new Number(1) !== 1) {
+  $ERROR('#4: null + new Number(1) === 1. Actual: ' + (null + new Number(1)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.3.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.3.js
new file mode 100644
index 000000000..dac10c083
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.3.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T2.3.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between Number (primitive or object) and Undefined
+ */
+
+//CHECK#1
+if (isNaN(1 + undefined) !== true) {
+  $ERROR('#1: 1 + undefined === Not-a-Number. Actual: ' + (1 + undefined));
+}
+
+//CHECK#2
+if (isNaN(undefined + 1) !== true) {
+  $ERROR('#2: undefined + 1 === Not-a-Number. Actual: ' + (undefined + 1));
+}
+
+//CHECK#3
+if (isNaN(new Number(1) + undefined) !== true) {
+  $ERROR('#3: new Number(1) + undefined === Not-a-Number. Actual: ' + (new Number(1) + undefined));
+}
+
+//CHECK#4
+if (isNaN(undefined + new Number(1)) !== true) {
+  $ERROR('#4: undefined + new Number(1) === Not-a-Number. Actual: ' + (undefined + new Number(1)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.4.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.4.js
new file mode 100644
index 000000000..a2d56e2f7
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.4.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T2.4.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between Boolean (primitive or object) and Undefined
+ */
+
+//CHECK#1
+if (isNaN(true + undefined) !== true) {
+  $ERROR('#1: true + undefined === Not-a-Number. Actual: ' + (true + undefined));
+}
+
+//CHECK#2
+if (isNaN(undefined + true) !== true) {
+  $ERROR('#2: undefined + true === Not-a-Number. Actual: ' + (undefined + true));
+}
+
+//CHECK#3
+if (isNaN(new Boolean(true) + undefined) !== true) {
+  $ERROR('#3: new Boolean(true) + undefined === Not-a-Number. Actual: ' + (new Boolean(true) + undefined));
+}
+
+//CHECK#4
+if (isNaN(undefined + new Boolean(true)) !== true) {
+  $ERROR('#4: undefined + new Boolean(true) === Not-a-Number. Actual: ' + (undefined + new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.5.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.5.js
new file mode 100644
index 000000000..a3cfe0523
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.1_T2.5.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is not String and Type(Primitive(y)) is not String, then operator x + y returns ToNumber(x) + ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.1_T2.5.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between Boolean (primitive or object) and Null
+ */
+
+//CHECK#1
+if (true + null !== 1) {
+  $ERROR('#1: true + null === 1. Actual: ' + (true + null));
+}
+
+//CHECK#2
+if (null + true !== 1) {
+  $ERROR('#2: null + true === 1. Actual: ' + (null + true));
+}
+
+//CHECK#3
+if (new Boolean(true) + null !== 1) {
+  $ERROR('#3: new Boolean(true) + null === 1. Actual: ' + (new Boolean(true) + null));
+}
+
+//CHECK#4
+if (null + new Boolean(true) !== 1) {
+  $ERROR('#4: null + new Boolean(true) === 1. Actual: ' + (null + new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T1.1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T1.1.js
new file mode 100644
index 000000000..f2f1f8724
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T1.1.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is String or Type(Primitive(y)) is String, then operator x + y returns the result of concatenating ToString(x) followed by ToString(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.2_T1.1.js
+ * @description Type(Primitive(x)) and Type(Primitive(y)) vary between primitive string and String object
+ */
+
+//CHECK#1
+if ("1" + "1" !== "11") {
+  $ERROR('#1: "1" + "1" === "11". Actual: ' + ("1" + "1"));
+}
+
+//CHECK#2
+if (new String("1") + "1" !== "11") {
+  $ERROR('#2: new String("1") + "1" === "11". Actual: ' + (new String("1") + "1"));
+}
+
+//CHECK#3
+if ("1" + new String("1") !== "11") {
+  $ERROR('#3: "1" + new String("1") === "11". Actual: ' + ("1" + new String("1")));
+}
+
+//CHECK#4
+if (new String("1") + new String("1") !== "11") {
+  $ERROR('#4: new String("1") + new String("1") === "11". Actual: ' + (new String("1") + new String("1")));
+}
+
+//CHECK#5
+if ("x" + "1" !=="x1") {
+  $ERROR('#5: "x" + "1" === "x1". Actual: ' + ("x" + "1"));
+}
+
+//CHECK#6
+if ("1" + "x" !== "1x") {
+  $ERROR('#6: "1" + "x" === "1x". Actual: ' + ("1" + "x"));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T1.2.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T1.2.js
new file mode 100644
index 000000000..422ed6b53
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T1.2.js
@@ -0,0 +1,32 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is String or Type(Primitive(y)) is String, then operator x + y returns the result of concatenating ToString(x) followed by ToString(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.2_T1.2.js
+ * @description Type(Primitive(x)) and Type(Primitive(y)) vary between Object object and Function object
+ */
+
+//CHECK#1
+if (({} + function(){return 1}) !== ({}.toString() + function(){return 1}.toString())) {
+  $ERROR('#1: ({} + function(){return 1}) === ({}.toString() + function(){return 1}.toString()). Actual: ' + (({} + function(){return 1})));
+}
+
+//CHECK#2
+if ((function(){return 1} + {}) !== (function(){return 1}.toString() + {}.toString())) {
+  $ERROR('#2: (function(){return 1} + {}) === (function(){return 1}.toString() + {}.toString()). Actual: ' + ((function(){return 1} + {})));
+}
+
+//CHECK#3
+if ((function(){return 1} + function(){return 1}) !== (function(){return 1}.toString() + function(){return 1}.toString())) {
+  $ERROR('#3: (function(){return 1} + function(){return 1}) === (function(){return 1}.toString() + function(){return 1}.toString()). Actual: ' + ((function(){return 1} + function(){return 1})));
+}
+
+//CHECK#4
+if (({} + {}) !== ({}.toString() + {}.toString())) {
+  $ERROR('#4: ({} + {}) === ({}.toString() + {}.toString()). Actual: ' + (({} + {})));
+}
+
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.1.js
new file mode 100644
index 000000000..461a14c1a
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.1.js
@@ -0,0 +1,60 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is String or Type(Primitive(y)) is String, then operator x + y returns the result of concatenating ToString(x) followed by ToString(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.2_T2.1.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between Number (primitive or object) and String (primitive and object)
+ */
+
+//CHECK#1
+if ("1" + 1 !== "11") {
+  $ERROR('#1: "1" + 1 === "11". Actual: ' + ("1" + 1));
+}
+
+//CHECK#2
+if (1 + "1" !== "11") {
+  $ERROR('#2: 1 + "1" === "11". Actual: ' + (1 + "1"));
+}
+
+//CHECK#3
+if (new String("1") + 1 !== "11") {
+  $ERROR('#3: new String("1") + 1 === "11". Actual: ' + (new String("1") + 1));
+}
+
+//CHECK#4
+if (1 + new String("1") !== "11") {
+  $ERROR('#4: 1 + new String("1") === "11". Actual: ' + (1 + new String("1")));
+}
+
+//CHECK#5
+if ("1" + new Number(1) !== "11") {
+  $ERROR('#5: "1" + new Number(1) === "11". Actual: ' + ("1" + new Number(1)));
+}
+
+//CHECK#6
+if (new Number(1) + "1" !== "11") {
+  $ERROR('#6: new Number(1) + "1" === "11". Actual: ' + (new Number(1) + "1"));
+}
+
+//CHECK#7
+if (new String("1") + new Number(1) !== "11") {
+  $ERROR('#7: new String("1") + new Number(1) === "11". Actual: ' + (new String("1") + new Number(1)));
+}
+
+//CHECK#8
+if (new Number(1) + new String("1") !== "11") {
+  $ERROR('#8: new Number(1) + new String("1") === "11". Actual: ' + (new Number(1) + new String("1")));
+}
+
+//CHECK#9
+if ("x" + 1 !=="x1") {
+  $ERROR('#9: "x" + 1 === "x1". Actual: ' + ("x" + 1));
+}
+
+//CHECK#10
+if (1 + "x" !== "1x") {
+  $ERROR('#10: 1 + "x" === "1x". Actual: ' + (1 + "x"));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.2.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.2.js
new file mode 100644
index 000000000..5f4a4075a
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.2.js
@@ -0,0 +1,50 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is String or Type(Primitive(y)) is String, then operator x + y returns the result of concatenating ToString(x) followed by ToString(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.2_T2.2.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between String (primitive or object) and Boolean (primitive and object)
+ */
+
+//CHECK#1
+if (true + "1" !== "true1") {
+  $ERROR('#1: true + "1" === "true1". Actual: ' + (true + "1"));
+}
+
+//CHECK#2
+if ("1" + true !== "1true") {
+  $ERROR('#2: "1" + true === "1true". Actual: ' + ("1" + true));
+}
+
+//CHECK#3
+if (new Boolean(true) + "1" !== "true1") {
+  $ERROR('#3: new Boolean(true) + "1" === "true1". Actual: ' + (new Boolean(true) + "1"));
+}
+
+//CHECK#4
+if ("1" + new Boolean(true) !== "1true") {
+  $ERROR('#4: "1" + new Boolean(true) === "1true". Actual: ' + ("1" + new Boolean(true)));
+}
+
+//CHECK#5
+if (true + new String("1") !== "true1") {
+  $ERROR('#5: true + new String("1") === "true1". Actual: ' + (true + new String("1")));
+}
+
+//CHECK#6
+if (new String("1") + true !== "1true") {
+  $ERROR('#6: new String("1") + true === "1true". Actual: ' + (new String("1") + true));
+}
+
+//CHECK#7
+if (new Boolean(true) + new String("1") !== "true1") {
+  $ERROR('#7: new Boolean(true) + new String("1") === "true1". Actual: ' + (new Boolean(true) + new String("1")));
+}
+
+//CHECK#8
+if (new String("1") + new Boolean(true) !== "1true") {
+  $ERROR('#8: new String("1") + new Boolean(true) === "1true". Actual: ' + (new String("1") + new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.3.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.3.js
new file mode 100644
index 000000000..a097ed83b
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.3.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is String or Type(Primitive(y)) is String, then operator x + y returns the result of concatenating ToString(x) followed by ToString(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.2_T2.3.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between String (primitive or object) and Undefined
+ */
+
+//CHECK#1
+if ("1" + undefined !== "1undefined") {
+  $ERROR('#1: "1" + undefined === "1undefined". Actual: ' + ("1" + undefined));
+}
+
+//CHECK#2
+if (undefined + "1" !== "undefined1") {
+  $ERROR('#2: undefined + "1" === "undefined1". Actual: ' + (undefined + "1"));
+}
+
+//CHECK#3
+if (new String("1") + undefined !== "1undefined") {
+  $ERROR('#3: new String("1") + undefined === "1undefined". Actual: ' + (new String("1") + undefined));
+}
+
+//CHECK#4
+if (undefined + new String("1") !== "undefined1") {
+  $ERROR('#4: undefined + new String("1") === "undefined1". Actual: ' + (undefined + new String("1")));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.4.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.4.js
new file mode 100644
index 000000000..a957677b7
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A3.2_T2.4.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * If Type(Primitive(x)) is String or Type(Primitive(y)) is String, then operator x + y returns the result of concatenating ToString(x) followed by ToString(y)
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A3.2_T2.4.js
+ * @description Type(Primitive(x)) is different from Type(Primitive(y)) and both types vary between String (primitive or object) and Null
+ */
+
+//CHECK#1
+if ("1" + null !== "1null") {
+  $ERROR('#1: "1" + null === "1null". Actual: ' + ("1" + null));
+}
+
+//CHECK#2
+if (null + "1" !== "null1") {
+  $ERROR('#2: null + "1" === "null1". Actual: ' + (null + "1"));
+}
+
+//CHECK#3
+if (new String("1") + null !== "1null") {
+  $ERROR('#3: new String("1") + null === "1null". Actual: ' + (new String("1") + null));
+}
+
+//CHECK#4
+if (null + new String("1") !== "null1") {
+  $ERROR('#4: null + new String("1") === "null1". Actual: ' + (null + new String("1")));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T1.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T1.js
new file mode 100644
index 000000000..8a8ac37da
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T1.js
@@ -0,0 +1,41 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T1.js
+ * @description If either operand is NaN, the result is NaN
+ */
+
+//CHECK#1
+if (isNaN(Number.NaN + 1) !== true ) {
+  $ERROR('#1: NaN + 1 === Not-a-Number. Actual: ' + (NaN + 1));
+}
+
+//CHECK#2
+if (isNaN(1 + Number.NaN) !== true ) {
+  $ERROR('#2: 1 + NaN === Not-a-Number. Actual: ' + (1 + NaN));
+}
+
+//CHECK#3
+if (isNaN(Number.NaN + Number.POSITIVE_INFINITY) !== true ) {
+  $ERROR('#3: NaN + Infinity === Not-a-Number. Actual: ' + (NaN + Infinity));
+}
+
+//CHECK#4
+if (isNaN(Number.POSITIVE_INFINITY + Number.NaN) !== true ) {
+  $ERROR('#4: Infinity + NaN === Not-a-Number. Actual: ' + (Infinity + NaN));
+}
+
+//CHECK#5
+if (isNaN(Number.NaN + Number.NEGATIVE_INFINITY) !== true ) {
+  $ERROR('#5: NaN + Infinity === Not-a-Number. Actual: ' + (NaN + Infinity));
+}
+
+//CHECK#6
+if (isNaN(Number.NEGATIVE_INFINITY + Number.NaN) !== true ) {
+  $ERROR('#6: Infinity + NaN === Not-a-Number. Actual: ' + (Infinity + NaN));
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T2.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T2.js
new file mode 100644
index 000000000..6e6452567
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T2.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T2.js
+ * @description The sum of two infinities of opposite sign is NaN
+ */
+
+//CHECK#1
+if (isNaN(Number.POSITIVE_INFINITY + Number.NEGATIVE_INFINITY) !== true ) {
+  $ERROR('#1: Infinity + -Infinity === Not-a-Number. Actual: ' + (Infinity + -Infinity));
+}
+
+//CHECK#2
+if (isNaN(Number.NEGATIVE_INFINITY + Number.POSITIVE_INFINITY) !== true ) {
+  $ERROR('#2: -Infinity + Infinity === Not-a-Number. Actual: ' + (-Infinity + Infinity));
+}
+
+
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T3.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T3.js
new file mode 100644
index 000000000..d434e6c23
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T3.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T3.js
+ * @description The sum of two infinities of the same sign is the infinity of that sign
+ */
+
+//CHECK#1
+if (Number.POSITIVE_INFINITY + Number.POSITIVE_INFINITY !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#1: Infinity + Infinity === Infinity. Actual: ' + (Infinity + Infinity));
+}
+
+//CHECK#2
+if (Number.NEGATIVE_INFINITY + Number.NEGATIVE_INFINITY !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#2: -Infinity + -Infinity === -Infinity. Actual: ' + (-Infinity + -Infinity));
+}
+
+
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T4.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T4.js
new file mode 100644
index 000000000..4fd4a6f56
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T4.js
@@ -0,0 +1,53 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T4.js
+ * @description The sum of an infinity and a finite value is equal to the infinite operand
+ */
+
+//CHECK#1
+if (Number.POSITIVE_INFINITY + 1 !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#1: Infinity + 1 === Infinity. Actual: ' + (Infinity + 1));
+}
+
+//CHECK#2
+if (-1 + Number.POSITIVE_INFINITY !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#2: -1 + Infinity === Infinity. Actual: ' + (-1 + Infinity));
+}
+
+//CHECK#3
+if (Number.NEGATIVE_INFINITY + 1 !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#3: -Infinity + 1 === -Infinity. Actual: ' + (-Infinity + 1));
+}
+
+//CHECK#4
+if (-1 + Number.NEGATIVE_INFINITY !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#4: -1 + -Infinity === -Infinity. Actual: ' + (-1 + -Infinity));
+}
+
+//CHECK#5
+if (Number.POSITIVE_INFINITY + Number.MAX_VALUE !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#5: Infinity + Number.MAX_VALUE === Infinity. Actual: ' + (Infinity + Number.MAX_VALUE));
+}
+
+//CHECK#6
+if (-Number.MAX_VALUE + Number.POSITIVE_INFINITY !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#6: -Number.MAX_VALUE + Infinity === Infinity. Actual: ' + (-Number.MAX_VALUE + Infinity));
+}
+
+//CHECK#7
+if (Number.NEGATIVE_INFINITY + Number.MAX_VALUE !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#7: -Infinity + Number.MAX_VALUE === -Infinity. Actual: ' + (-Infinity + Number.MAX_VALUE));
+}
+
+//CHECK#8
+if (-Number.MAX_VALUE + Number.NEGATIVE_INFINITY !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#8: -Number.MAX_VALUE + -Infinity === -Infinity. Actual: ' + (-Number.MAX_VALUE + -Infinity));
+}
+
+
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T5.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T5.js
new file mode 100644
index 000000000..3ae18550a
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T5.js
@@ -0,0 +1,46 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T5.js
+ * @description The sum of two negative zeros is -0. The sum of two positive zeros, or of two zeros of opposite sign is +0
+ */
+
+//CHECK#1
+if (-0 + -0 !== -0 ) {  
+  $ERROR('#1.1: -0 + -0 === 0. Actual: ' + (-0 + -0));
+} else {
+  if (1 / (-0 + -0) !== Number.NEGATIVE_INFINITY) {
+    $ERROR('#1.1: -0 + -0 === - 0. Actual: +0');
+  }
+}
+
+//CHECK#2
+if (0 + -0 !== 0 ) {  
+  $ERROR('#2.1: 0 + -0 === 0. Actual: ' + (0 + -0));
+} else {
+  if (1 / (0 + -0) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#2.2: 0 + -0 === + 0. Actual: -0');
+  }
+}
+
+//CHECK#3
+if (-0 + 0 !== 0 ) {  
+  $ERROR('#3.1: -0 + 0 === 0. Actual: ' + (-0 + 0));
+} else {
+  if (1 / (-0 + 0) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#3.2: -0 + 0 === + 0. Actual: -0');
+  }
+}
+
+//CHECK#4
+if (0 + 0 !== 0 ) {  
+  $ERROR('#4.1: 0 + 0 === 0. Actual: ' + (0 + 0));
+} else {
+  if (1 / (0 + 0) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#4.2: 0 + 0 === + 0. Actual: -0');
+  }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T6.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T6.js
new file mode 100644
index 000000000..b25a8fbae
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T6.js
@@ -0,0 +1,50 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T6.js
+ * @description The sum of a zero and a nonzero finite value is equal to the nonzero operand
+ */
+
+//CHECK#1
+if (1 + -0 !== 1 ) {  
+  $ERROR('#1: 1 + -0 === 1. Actual: ' + (1 + -0));
+}
+
+//CHECK#2
+if (1 + 0 !== 1 ) {  
+  $ERROR('#2: 1 + 0 === 1. Actual: ' + (1 + 0));
+} 
+
+//CHECK#3
+if (-0 + 1 !== 1 ) {  
+  $ERROR('#3: -0 + 1 === 1. Actual: ' + (-0 + 1));
+}
+
+//CHECK#4
+if (0 + 1 !== 1 ) {  
+  $ERROR('#4: 0 + 1 === 1. Actual: ' + (0 + 1));
+} 
+
+//CHECK#5
+if (Number.MAX_VALUE + -0 !== Number.MAX_VALUE ) {  
+  $ERROR('#5: Number.MAX_VALUE + -0 === Number.MAX_VALUE. Actual: ' + (Number.MAX_VALUE + -0));
+}
+
+//CHECK#6
+if (Number.MAX_VALUE + 0 !== Number.MAX_VALUE ) {  
+  $ERROR('#6: Number.MAX_VALUE + 0 === Number.MAX_VALUE. Actual: ' + (Number.MAX_VALUE + 0));
+} 
+
+//CHECK#7
+if (-0 + Number.MIN_VALUE !== Number.MIN_VALUE ) {  
+  $ERROR('#7: -0 + Number.MIN_VALUE === Number.MIN_VALUE. Actual: ' + (-0 + Number.MIN_VALUE));
+}
+
+//CHECK#8
+if (0 + Number.MIN_VALUE !== Number.MIN_VALUE ) {  
+  $ERROR('#8: 0 + Number.MIN_VALUE === Number.MIN_VALUE. Actual: ' + (0 + Number.MIN_VALUE));
+} 
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T7.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T7.js
new file mode 100644
index 000000000..c8af57916
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T7.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T7.js
+ * @description The sum of two nonzero finite values of the same magnitude and opposite sign is +0
+ */
+
+//CHECK#1
+if (-Number.MIN_VALUE + Number.MIN_VALUE !== +0) {  
+  $ERROR('#1.1: -Number.MIN_VALUE + Number.MIN_VALUE === 0. Actual: ' + (-Number.MIN_VALUE + Number.MIN_VALUE));
+} else {
+  if (1 / (-Number.MIN_VALUE + Number.MIN_VALUE) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#1.2: -Number.MIN_VALUE + Number.MIN_VALUE === + 0. Actual: -0');
+  }
+}
+
+//CHECK#2
+if (-Number.MAX_VALUE + Number.MAX_VALUE !== +0) {  
+  $ERROR('#2.1: -Number.MAX_VALUE + Number.MAX_VALUE === 0. Actual: ' + (-Number.MAX_VALUE + Number.MAX_VALUE));
+} else {
+  if (1 / (-Number.MAX_VALUE + Number.MAX_VALUE) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#2.2: -Number.MAX_VALUE + Number.MAX_VALUE === + 0. Actual: -0');
+  }
+}
+
+//CHECK#3
+if (-1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE !== +0) {  
+  $ERROR('#3.1: -1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE === 0. Actual: ' + (-1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE));
+} else {
+  if (1 / (-1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#3.2: -1 / Number.MAX_VALUE + 1 / Number.MAX_VALUE === + 0. Actual: -0');
+  }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T8.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T8.js
new file mode 100644
index 000000000..ec90d44e5
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T8.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T8.js
+ * @description If the magnitude is too large to represent, the operation overflows and the result is then an infinity of appropriate sign
+ */
+
+//CHECK#1
+if (Number.MAX_VALUE + Number.MAX_VALUE !== Number.POSITIVE_INFINITY) {
+  $ERROR('#1: Number.MAX_VALUE + Number.MAX_VALUE === Number.POSITIVE_INFINITY. Actual: ' + (Number.MAX_VALUE + Number.MAX_VALUE));
+}
+
+//CHECK#2
+if (-Number.MAX_VALUE - Number.MAX_VALUE !== Number.NEGATIVE_INFINITY) {
+  $ERROR('#2: -Number.MAX_VALUE - Number.MAX_VALUE === Number.NEGATIVE_INFINITY. Actual: ' + (-Number.MAX_VALUE - Number.MAX_VALUE));
+}
+
+//CHECK#3
+if (1e+308 + 1e+308 !== Number.POSITIVE_INFINITY) {
+  $ERROR('#3: 1e+308 + 1e+308 === Number.POSITIVE_INFINITY. Actual: ' + (1e+308 + 1e+308));
+}
+
+//CHECK#4
+if (-8.99e+307 - 8.99e+307 !== Number.NEGATIVE_INFINITY) {
+  $ERROR('#4: -8.99e+307 - 8.99e+307 === Number.NEGATIVE_INFINITY. Actual: ' + (-8.99e+307 - 8.99e+307));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T9.js b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T9.js
new file mode 100644
index 000000000..bc082438a
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/S11.6.1_A4_T9.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * The result of an addition is determined using the rules of IEEE 754 double-precision arithmetics
+ *
+ * @path ch11/11.6/11.6.1/S11.6.1_A4_T9.js
+ * @description The addition operator is not always associative ( x + y + z is the same (x + y) + z, not x + (y + z))
+ */
+
+//CHECK#1
+if (-Number.MAX_VALUE + Number.MAX_VALUE + Number.MAX_VALUE !== (-Number.MAX_VALUE + Number.MAX_VALUE) + Number.MAX_VALUE) {
+  $ERROR('#1: -Number.MAX_VALUE + Number.MAX_VALUE + Number.MAX_VALUE === (-Number.MAX_VALUE + Number.MAX_VALUE) + Number.MAX_VALUE. Actual: ' + (-Number.MAX_VALUE + Number.MAX_VALUE + Number.MAX_VALUE));
+} 
+
+//CHECK#2
+if ((-Number.MAX_VALUE + Number.MAX_VALUE) + Number.MAX_VALUE === -Number.MAX_VALUE + (Number.MAX_VALUE + Number.MAX_VALUE)) {
+  $ERROR('#2: (-Number.MAX_VALUE + Number.MAX_VALUE) + Number.MAX_VALUE === -Number.MAX_VALUE + (Number.MAX_VALUE + Number.MAX_VALUE). Actual: ' + ((-Number.MAX_VALUE + Number.MAX_VALUE) + Number.MAX_VALUE));
+}
+
+//CHECK#3
+if ("1" + 1 + 1 !== ("1" + 1) + 1) {
+  $ERROR('#3: "1" + 1 + 1 === ("1" + 1) + 1. Actual: ' + ("1" + 1 + 1));
+} 
+
+//CHECK#4
+if (("1" + 1) + 1 === "1" + (1 + 1)) {
+  $ERROR('#4: ("1" + 1) + 1 !== "1" + (1 + 1)');
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/browser.js b/js/src/tests/test262/ch11/11.6/11.6.1/browser.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/browser.js
diff --git a/js/src/tests/test262/ch11/11.6/11.6.1/shell.js b/js/src/tests/test262/ch11/11.6/11.6.1/shell.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.1/shell.js
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A1.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A1.js
new file mode 100644
index 000000000..c3c08a221
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A1.js
@@ -0,0 +1,60 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * White Space and Line Terminator between AdditiveExpression and "-" or between "-" and MultiplicativeExpression are allowed
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A1.js
+ * @description Checking by using eval
+ */
+
+//CHECK#1
+if (eval("1\u0009-\u00091") !== 0) {
+  $ERROR('#1: 1\\u0009-\\u00091 === 0');
+}
+
+//CHECK#2
+if (eval("1\u000B-\u000B1") !== 0) {
+  $ERROR('#2: 1\\u000B-\\u000B1 === 0');  
+}
+
+//CHECK#3
+if (eval("1\u000C-\u000C1") !== 0) {
+  $ERROR('#3: 1\\u000C-\\u000C1 === 0');
+}
+
+//CHECK#4
+if (eval("1\u0020-\u00201") !== 0) {
+  $ERROR('#4: 1\\u0020-\\u00201 === 0');
+}
+
+//CHECK#5
+if (eval("1\u00A0-\u00A01") !== 0) {
+  $ERROR('#5: 1\\u00A0-\\u00A01 === 0');
+}
+
+//CHECK#6
+if (eval("1\u000A-\u000A1") !== 0) {
+  $ERROR('#6: 1\\u000A-\\u000A1 === 0');  
+}
+
+//CHECK#7
+if (eval("1\u000D-\u000D1") !== 0) {
+  $ERROR('#7: 1\\u000D-\\u000D1 === 0');
+}
+
+//CHECK#8
+if (eval("1\u2028-\u20281") !== 0) {
+  $ERROR('#8: 1\\u2028-\\u20281 === 0');
+}
+
+//CHECK#9
+if (eval("1\u2029-\u20291") !== 0) {
+  $ERROR('#9: 1\\u2029-\\u20291 === 0');
+}
+
+//CHECK#10
+if (eval("1\u0009\u000B\u000C\u0020\u00A0\u000A\u000D\u2028\u2029-\u0009\u000B\u000C\u0020\u00A0\u000A\u000D\u2028\u20291") !== 0) {
+  $ERROR('#10: 1\\u0009\\u000B\\u000C\\u0020\\u00A0\\u000A\\u000D\\u2028\\u2029-\\u0009\\u000B\\u000C\\u0020\\u00A0\\u000A\\u000D\\u2028\\u20291 === 0');
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T1.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T1.js
new file mode 100644
index 000000000..8d85c8233
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T1.js
@@ -0,0 +1,43 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y uses GetValue
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A2.1_T1.js
+ * @description Either Type is not Reference or GetBase is not null
+ */
+
+//CHECK#1
+if (1 - 1 !== 0) {
+  $ERROR('#1: 1 - 1 === 0. Actual: ' + (1 - 1));
+}
+
+//CHECK#2
+var x = 1;
+if (x - 1 !== 0) {
+  $ERROR('#2: var x = 1; x - 1 === 0. Actual: ' + (x - 1));
+}
+
+//CHECK#3
+var y = 1;
+if (1 - y !== 0) {
+  $ERROR('#3: var y = 1; 1 - y === 0. Actual: ' + (1 - y));
+}
+
+//CHECK#4
+var x = 1;
+var y = 1;
+if (x - y !== 0) {
+  $ERROR('#4: var x = 1; var y = 1; x - y === 0. Actual: ' + (x - y));
+}
+
+//CHECK#5
+var objectx = new Object();
+var objecty = new Object();
+objectx.prop = 1;
+objecty.prop = 1;
+if (objectx.prop - objecty.prop !== 0) {
+  $ERROR('#5: var objectx = new Object(); var objecty = new Object(); objectx.prop = 1; objecty.prop = 1; objectx.prop - objecty.prop === 0. Actual: ' + (objectx.prop - objecty.prop));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T2.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T2.js
new file mode 100644
index 000000000..34bcafc2b
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T2.js
@@ -0,0 +1,21 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y uses GetValue
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A2.1_T2.js
+ * @description If GetBase(x) is null, throw ReferenceError
+ */
+
+//CHECK#1
+try {
+  x - 1;
+  $ERROR('#1.1: x - 1 throw ReferenceError. Actual: ' + (x - 1));  
+}
+catch (e) {
+  if ((e instanceof ReferenceError) !== true) {
+    $ERROR('#1.2: x - 1 throw ReferenceError. Actual: ' + (e));  
+  }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T3.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T3.js
new file mode 100644
index 000000000..e5ef600f8
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.1_T3.js
@@ -0,0 +1,21 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y uses GetValue
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A2.1_T3.js
+ * @description If GetBase(y) is null, throw ReferenceError
+ */
+
+//CHECK#1
+try {
+  1 - y;
+  $ERROR('#1.1: 1 - y throw ReferenceError. Actual: ' + (1 - y));  
+}
+catch (e) {
+  if ((e instanceof ReferenceError) !== true) {
+    $ERROR('#1.2: 1 - y throw ReferenceError. Actual: ' + (e));  
+  }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.2_T1.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.2_T1.js
new file mode 100644
index 000000000..3f24d4c13
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.2_T1.js
@@ -0,0 +1,71 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y uses [[Default Value]]
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A2.2_T1.js
+ * @description If Type(value) is Object, evaluate ToPrimitive(value, Number)
+ */
+
+//CHECK#1
+if ({valueOf: function() {return 1}} - 1 !== 0) {
+  $ERROR('#1: {valueOf: function() {return 1}} - 1 === 0. Actual: ' + ({valueOf: function() {return 1}} - 1));
+}
+
+//CHECK#2
+if ({valueOf: function() {return 1}, toString: function() {return 0}} - 1 !== 0) {
+  $ERROR('#2: {valueOf: function() {return 1}, toString: function() {return 0}} - 1 === 0. Actual: ' + ({valueOf: function() {return 1}, toString: function() {return 0}} - 1));
+}
+
+//CHECK#3
+if ({valueOf: function() {return 1}, toString: function() {return {}}} - 1 !== 0) {
+  $ERROR('#3: {valueOf: function() {return 1}, toString: function() {return {}}} - 1 === 0. Actual: ' + ({valueOf: function() {return 1}, toString: function() {return {}}} - 1));
+}
+
+//CHECK#4
+try {
+  if ({valueOf: function() {return 1}, toString: function() {throw "error"}} - 1 !== 0) {
+    $ERROR('#4.1: {valueOf: function() {return 1}, toString: function() {throw "error"}} - 1 === 0. Actual: ' + ({valueOf: function() {return 1}, toString: function() {throw "error"}} - 1));
+  }
+}
+catch (e) {
+  if (e === "error") {
+    $ERROR('#4.2: {valueOf: function() {return 1}, toString: function() {throw "error"}} - 1 not throw "error"');
+  } else {
+    $ERROR('#4.3: {valueOf: function() {return 1}, toString: function() {throw "error"}} - 1 not throw Error. Actual: ' + (e));
+  }
+}
+
+//CHECK#5
+if (1 - {toString: function() {return 1}} !== 0) {
+  $ERROR('#5: 1 - {toString: function() {return 1}} === 0. Actual: ' + (1 - {toString: function() {return 1}}));
+}
+
+//CHECK#6
+if (1 - {valueOf: function() {return {}}, toString: function() {return 1}} !== 0) {
+  $ERROR('#6: 1 - {valueOf: function() {return {}}, toString: function() {return 1}} === 0. Actual: ' + (1 - {valueOf: function() {return {}}, toString: function() {return 1}}));
+}
+
+//CHECK#7
+try {
+  1 - {valueOf: function() {throw "error"}, toString: function() {return 1}};
+  $ERROR('#7.1: 1 - {valueOf: function() {throw "error"}, toString: function() {return 1}} throw "error". Actual: ' + (1 - {valueOf: function() {throw "error"}, toString: function() {return 1}}));
+}  
+catch (e) {
+  if (e !== "error") {
+    $ERROR('#7.2: 1 - {valueOf: function() {throw "error"}, toString: function() {return 1}} throw "error". Actual: ' + (e));
+  } 
+}
+
+//CHECK#8
+try {
+  1 - {valueOf: function() {return {}}, toString: function() {return {}}};
+  $ERROR('#8.1: 1 - {valueOf: function() {return {}}, toString: function() {return {}}} throw TypeError. Actual: ' + (1 - {valueOf: function() {return {}}, toString: function() {return {}}}));
+}  
+catch (e) {
+  if ((e instanceof TypeError) !== true) {
+    $ERROR('#8.2: 1 - {valueOf: function() {return {}}, toString: function() {return {}}} throw TypeError. Actual: ' + (e));
+  } 
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.3_T1.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.3_T1.js
new file mode 100644
index 000000000..b54588088
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.3_T1.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * ToNumber(first expression) is called first, and then ToNumber(second expression)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A2.3_T1.js
+ * @description Checking with "throw"
+ */
+
+//CHECK#1
+var x = { valueOf: function () { throw "x"; } };
+var y = { valueOf: function () { throw "y"; } };
+try {
+   x - y;
+   $ERROR('#1.1: var x = { valueOf: function () { throw "x"; } }; var y = { valueOf: function () { throw "y"; } }; x - y throw "x". Actual: ' + (x - y));
+} catch (e) {
+   if (e === "y") {
+     $ERROR('#1.2: ToNumber(first expression) is called first, and then ToNumber(second expression)');
+   } else {
+     if (e !== "x") {
+       $ERROR('#1.3: var x = { valueOf: function () { throw "x"; } }; var y = { valueOf: function () { throw "y"; } }; x - y throw "x". Actual: ' + (e));
+     }
+   }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T1.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T1.js
new file mode 100644
index 000000000..09b0a7184
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T1.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * First expression is evaluated first, and then second expression
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A2.4_T1.js
+ * @description Checking with "="
+ */
+
+//CHECK#1
+var x = 0; 
+if ((x = 1) - x !== 0) {
+  $ERROR('#1: var x = 0; (x = 1) - x === 0. Actual: ' + ((x = 1) - x));
+}
+
+//CHECK#2
+var x = 0; 
+if (x - (x = 1) !== -1) {
+  $ERROR('#2: var x = 0; x - (x = 1) === -1. Actual: ' + (x - (x = 1)));
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T2.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T2.js
new file mode 100644
index 000000000..ef853e38f
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T2.js
@@ -0,0 +1,26 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * First expression is evaluated first, and then second expression
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A2.4_T2.js
+ * @description Checking with "throw"
+ */
+
+//CHECK#1
+var x = function () { throw "x"; };
+var y = function () { throw "y"; };
+try {
+   x() - y();
+   $ERROR('#1.1: var x = function () { throw "x"; }; var y = function () { throw "y"; }; x() - y() throw "x". Actual: ' + (x() - y()));
+} catch (e) {
+   if (e === "y") {
+     $ERROR('#1.2: First expression is evaluated first, and then second expression');
+   } else {
+     if (e !== "x") {
+       $ERROR('#1.3: var x = function () { throw "x"; }; var y = function () { throw "y"; }; x() - y() throw "x". Actual: ' + (e));
+     }
+   }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T3.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T3.js
new file mode 100644
index 000000000..ace9f2e95
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A2.4_T3.js
@@ -0,0 +1,27 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * First expression is evaluated first, and then second expression
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A2.4_T3.js
+ * @description Checking with undeclarated variables
+ */
+
+//CHECK#1
+try {
+  x - (x = 1);
+  $ERROR('#1.1: x - (x = 1) throw ReferenceError. Actual: ' + (x - (x = 1)));  
+}
+catch (e) {
+  if ((e instanceof ReferenceError) !== true) {
+    $ERROR('#1.2: x - (x = 1) throw ReferenceError. Actual: ' + (e));  
+  }
+}
+
+//CHECK#2
+if ((y = 1) - y !== 0) {
+  $ERROR('#2: (y = 1) - y === 0. Actual: ' + ((y = 1) - y));
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.1.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.1.js
new file mode 100644
index 000000000..732297bf4
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.1.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T1.1.js
+ * @description Type(x) and Type(y) vary between primitive boolean and Boolean object
+ */
+
+//CHECK#1
+if (true - true !== 0) {
+  $ERROR('#1: true - true === 0. Actual: ' + (true - true));
+}
+
+//CHECK#2
+if (new Boolean(true) - true !== 0) {
+  $ERROR('#2: new Boolean(true) - true === 0. Actual: ' + (new Boolean(true) - true));
+}
+
+//CHECK#3
+if (true - new Boolean(true) !== 0) {
+  $ERROR('#3: true - new Boolean(true) === 0. Actual: ' + (true - new Boolean(true)));
+}
+
+//CHECK#4
+if (new Boolean(true) - new Boolean(true) !== 0) {
+  $ERROR('#4: new Boolean(true) - new Boolean(true) === 0. Actual: ' + (new Boolean(true) - new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.2.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.2.js
new file mode 100644
index 000000000..4a19423a0
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.2.js
@@ -0,0 +1,31 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T1.2.js
+ * @description Type(x) and Type(y) vary between primitive number and Number object
+ */
+
+//CHECK#1
+if (1 - 1 !== 0) {
+  $ERROR('#1: 1 - 1 === 0. Actual: ' + (1 - 1));
+}
+
+//CHECK#2
+if (new Number(1) - 1 !== 0) {
+  $ERROR('#2: new Number(1) - 1 === 0. Actual: ' + (new Number(1) - 1));
+}
+
+//CHECK#3
+if (1 - new Number(1) !== 0) {
+  $ERROR('#3: 1 - new Number(1) === 0. Actual: ' + (1 - new Number(1)));
+}
+
+//CHECK#4
+if (new Number(1) - new Number(1) !== 0) {
+  $ERROR('#4: new Number(1) - new Number(1) === 0. Actual: ' + (new Number(1) - new Number(1)));
+}
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.3.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.3.js
new file mode 100644
index 000000000..5e2f31a80
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.3.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T1.3.js
+ * @description Type(x) and Type(y) vary between primitive string and String object
+ */
+
+//CHECK#1
+if ("1" - "1" !== 0) {
+  $ERROR('#1: "1" - "1" === 0. Actual: ' + ("1" - "1"));
+}
+
+//CHECK#2
+if (new String("1") - "1" !== 0) {
+  $ERROR('#2: new String("1") - "1" === 0. Actual: ' + (new String("1") - "1"));
+}
+
+//CHECK#3
+if ("1" - new String("1") !== 0) {
+  $ERROR('#3: "1" - new String("1") === 0. Actual: ' + ("1" - new String("1")));
+}
+
+//CHECK#4
+if (new String("1") - new String("1") !== 0) {
+  $ERROR('#4: new String("1") - new String("1") === 0. Actual: ' + (new String("1") - new String("1")));
+}
+
+//CHECK#5
+if (isNaN("x" - "1") !== true) {
+  $ERROR('#5: "x" - "1" === Not-a-Number. Actual: ' + ("x" - "1"));
+}
+
+//CHECK#6
+if (isNaN("1" - "x") !== true) {
+  $ERROR('#6: "1" - "x" === Not-a-Number. Actual: ' + ("1" - "x"));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.4.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.4.js
new file mode 100644
index 000000000..a76eb6628
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.4.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T1.4.js
+ * @description Type(x) and Type(y) vary between Null and Undefined
+ */
+
+//CHECK#1
+if (isNaN(null - undefined) !== true) {
+  $ERROR('#1: null - undefined === Not-a-Number. Actual: ' + (null - undefined));
+}
+
+//CHECK#2
+if (isNaN(undefined - null) !== true) {
+  $ERROR('#2: undefined - null === Not-a-Number. Actual: ' + (undefined - null));
+}
+
+//CHECK#3
+if (isNaN(undefined - undefined) !== true) {
+  $ERROR('#3: undefined - undefined === Not-a-Number. Actual: ' + (undefined - undefined));
+}
+
+//CHECK#4
+if (null - null !== 0) {
+  $ERROR('#4: null - null === 0. Actual: ' + (null - null));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.5.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.5.js
new file mode 100644
index 000000000..21bc87c78
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T1.5.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T1.5.js
+ * @description Type(x) and Type(y) vary between Object object and Function object
+ */
+
+//CHECK#1
+if (isNaN({} - function(){return 1}) !== true) {
+  $ERROR('#1: {} - function(){return 1} === Not-a-Number. Actual: ' + ({} - function(){return 1}));
+}
+
+//CHECK#2
+if (isNaN(function(){return 1} - {}) !== true) {
+  $ERROR('#2: function(){return 1} - {} === Not-a-Number. Actual: ' + (function(){return 1} - {}));
+}
+
+//CHECK#3
+if (isNaN(function(){return 1} - function(){return 1}) !== true) {
+  $ERROR('#3: function(){return 1} - function(){return 1} === Not-a-Number. Actual: ' + (function(){return 1} - function(){return 1}));
+}
+
+//CHECK#4
+if (isNaN({} - {}) !== true) {
+  $ERROR('#4: {} - {} === Not-a-Number. Actual: ' + ({} - {}));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.1.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.1.js
new file mode 100644
index 000000000..8682a7154
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.1.js
@@ -0,0 +1,50 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.1.js
+ * @description Type(x) is different from Type(y) and both types vary between Number (primitive or object) and Boolean (primitive and object)
+ */
+
+//CHECK#1
+if (true - 1 !== 0) {
+  $ERROR('#1: true - 1 === 0. Actual: ' + (true - 1));
+}
+
+//CHECK#2
+if (1 - true !== 0) {
+  $ERROR('#2: 1 - true === 0. Actual: ' + (1 - true));
+}
+
+//CHECK#3
+if (new Boolean(true) - 1 !== 0) {
+  $ERROR('#3: new Boolean(true) - 1 === 0. Actual: ' + (new Boolean(true) - 1));
+}
+
+//CHECK#4
+if (1 - new Boolean(true) !== 0) {
+  $ERROR('#4: 1 - new Boolean(true) === 0. Actual: ' + (1 - new Boolean(true)));
+}
+
+//CHECK#5
+if (true - new Number(1) !== 0) {
+  $ERROR('#5: true - new Number(1) === 0. Actual: ' + (true - new Number(1)));
+}
+
+//CHECK#6
+if (new Number(1) - true !== 0) {
+  $ERROR('#6: new Number(1) - true === 0. Actual: ' + (new Number(1) - true));
+}
+
+//CHECK#7
+if (new Boolean(true) - new Number(1) !== 0) {
+  $ERROR('#7: new Boolean(true) - new Number(1) === 0. Actual: ' + (new Boolean(true) - new Number(1)));
+}
+
+//CHECK#8
+if (new Number(1) - new Boolean(true) !== 0) {
+  $ERROR('#8: new Number(1) - new Boolean(true) === 0. Actual: ' + (new Number(1) - new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.2.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.2.js
new file mode 100644
index 000000000..2c98620cc
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.2.js
@@ -0,0 +1,60 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.2.js
+ * @description Type(x) is different from Type(y) and both types vary between Number (primitive or object) and String (primitive and object)
+ */
+
+//CHECK#1
+if ("1" - 1 !== 0) {
+  $ERROR('#1: "1" - 1 === 0. Actual: ' + ("1" - 1));
+}
+
+//CHECK#2
+if (1 - "1" !== 0) {
+  $ERROR('#2: 1 - "1" === 0. Actual: ' + (1 - "1"));
+}
+
+//CHECK#3
+if (new String("1") - 1 !== 0) {
+  $ERROR('#3: new String("1") - 1 === 0. Actual: ' + (new String("1") - 1));
+}
+
+//CHECK#4
+if (1 - new String("1") !== 0) {
+  $ERROR('#4: 1 - new String("1") === 0. Actual: ' + (1 - new String("1")));
+}
+
+//CHECK#5
+if ("1" - new Number(1) !== 0) {
+  $ERROR('#5: "1" - new Number(1) === 0. Actual: ' + ("1" - new Number(1)));
+}
+
+//CHECK#6
+if (new Number(1) - "1" !== 0) {
+  $ERROR('#6: new Number(1) - "1" === 0. Actual: ' + (new Number(1) - "1"));
+}
+
+//CHECK#7
+if (new String("1") - new Number(1) !== 0) {
+  $ERROR('#7: new String("1") - new Number(1) === 0. Actual: ' + (new String("1") - new Number(1)));
+}
+
+//CHECK#8
+if (new Number(1) - new String("1") !== 0) {
+  $ERROR('#8: new Number(1) - new String("1") === 0. Actual: ' + (new Number(1) - new String("1")));
+}
+
+//CHECK#9
+if (isNaN("x" - 1) !== true) {
+  $ERROR('#9: "x" - 1 === Not-a-Number. Actual: ' + ("x" - 1));
+}
+
+//CHECK#10
+if (isNaN(1 - "x") !== true) {
+  $ERROR('#10: 1 - "x" === Not-a-Number. Actual: ' + (1 - "x"));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.3.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.3.js
new file mode 100644
index 000000000..9edba35ba
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.3.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.3.js
+ * @description Type(x) is different from Type(y) and both types vary between Number (primitive or object) and Null
+ */
+
+//CHECK#1
+if (1 - null !== 1) {
+  $ERROR('#1: 1 - null === 1. Actual: ' + (1 - null));
+}
+
+//CHECK#2
+if (null - 1 !== -1) {
+  $ERROR('#2: null - 1 === -1. Actual: ' + (null - 1));
+}
+
+//CHECK#3
+if (new Number(1) - null !== 1) {
+  $ERROR('#3: new Number(1) - null === 1. Actual: ' + (new Number(1) - null));
+}
+
+//CHECK#4
+if (null - new Number(1) !== -1) {
+  $ERROR('#4: null - new Number(1) === -1. Actual: ' + (null - new Number(1)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.4.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.4.js
new file mode 100644
index 000000000..9169bacdd
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.4.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.4.js
+ * @description Type(x) is different from Type(y) and both types vary between Number (primitive or object) and Undefined
+ */
+
+//CHECK#1
+if (isNaN(1 - undefined) !== true) {
+  $ERROR('#1: 1 - undefined === Not-a-Number. Actual: ' + (1 - undefined));
+}
+
+//CHECK#2
+if (isNaN(undefined - 1) !== true) {
+  $ERROR('#2: undefined - 1 === Not-a-Number. Actual: ' + (undefined - 1));
+}
+
+//CHECK#3
+if (isNaN(new Number(1) - undefined) !== true) {
+  $ERROR('#3: new Number(1) - undefined === Not-a-Number. Actual: ' + (new Number(1) - undefined));
+}
+
+//CHECK#4
+if (isNaN(undefined - new Number(1)) !== true) {
+  $ERROR('#4: undefined - new Number(1) === Not-a-Number. Actual: ' + (undefined - new Number(1)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.5.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.5.js
new file mode 100644
index 000000000..953fb4088
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.5.js
@@ -0,0 +1,50 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.5.js
+ * @description Type(x) is different from Type(y) and both types vary between String (primitive or object) and Boolean (primitive and object)
+ */
+
+//CHECK#1
+if (true - "1" !== 0) {
+  $ERROR('#1: true - "1" === 0. Actual: ' + (true - "1"));
+}
+
+//CHECK#2
+if ("1" - true !== 0) {
+  $ERROR('#2: "1" - true === 0. Actual: ' + ("1" - true));
+}
+
+//CHECK#3
+if (new Boolean(true) - "1" !== 0) {
+  $ERROR('#3: new Boolean(true) - "1" === 0. Actual: ' + (new Boolean(true) - "1"));
+}
+
+//CHECK#4
+if ("1" - new Boolean(true) !== 0) {
+  $ERROR('#4: "1" - new Boolean(true) === 0. Actual: ' + ("1" - new Boolean(true)));
+}
+
+//CHECK#5
+if (true - new String("1") !== 0) {
+  $ERROR('#5: true - new String("1") === 0. Actual: ' + (true - new String("1")));
+}
+
+//CHECK#6
+if (new String("1") - true !== 0) {
+  $ERROR('#6: new String("1") - true === 0. Actual: ' + (new String("1") - true));
+}
+
+//CHECK#7
+if (new Boolean(true) - new String("1") !== 0) {
+  $ERROR('#7: new Boolean(true) - new String("1") === 0. Actual: ' + (new Boolean(true) - new String("1")));
+}
+
+//CHECK#8
+if (new String("1") - new Boolean(true) !== 0) {
+  $ERROR('#8: new String("1") - new Boolean(true) === 0. Actual: ' + (new String("1") - new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.6.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.6.js
new file mode 100644
index 000000000..34fdcb385
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.6.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.6.js
+ * @description Type(x) is different from Type(y) and both types vary between String (primitive or object) and Undefined
+ */
+
+//CHECK#1
+if (isNaN("1" - undefined) !== true) {
+  $ERROR('#1: "1" - undefined === Not-a-Number. Actual: ' + ("1" - undefined));
+}
+
+//CHECK#2
+if (isNaN(undefined - "1") !== true) {
+  $ERROR('#2: undefined - "1" === Not-a-Number. Actual: ' + (undefined - "1"));
+}
+
+//CHECK#3
+if (isNaN(new String("1") - undefined) !== true) {
+  $ERROR('#3: new String("1") - undefined === Not-a-Number. Actual: ' + (new String("1") - undefined));
+}
+
+//CHECK#4
+if (isNaN(undefined - new String("1")) !== true) {
+  $ERROR('#4: undefined - new String("1") === Not-a-Number. Actual: ' + (undefined - new String("1")));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.7.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.7.js
new file mode 100644
index 000000000..3e467ed63
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.7.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.7.js
+ * @description Type(x) is different from Type(y) and both types vary between String (primitive or object) and Null
+ */
+
+//CHECK#1
+if ("1" - null !== 1) {
+  $ERROR('#1: "1" - null === 1. Actual: ' + ("1" - null));
+}
+
+//CHECK#2
+if (null - "1" !== -1) {
+  $ERROR('#2: null - "1" === -1. Actual: ' + (null - "1"));
+}
+
+//CHECK#3
+if (new String("1") - null !== 1) {
+  $ERROR('#3: new String("1") - null === 1. Actual: ' + (new String("1") - null));
+}
+
+//CHECK#4
+if (null - new String("1") !== -1) {
+  $ERROR('#4: null - new String("1") === -1. Actual: ' + (null - new String("1")));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.8.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.8.js
new file mode 100644
index 000000000..92704df1d
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.8.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.8.js
+ * @description Type(x) is different from Type(y) and both types vary between Boolean (primitive or object) and Undefined
+ */
+
+//CHECK#1
+if (isNaN(true - undefined) !== true) {
+  $ERROR('#1: true - undefined === Not-a-Number. Actual: ' + (true - undefined));
+}
+
+//CHECK#2
+if (isNaN(undefined - true) !== true) {
+  $ERROR('#2: undefined - true === Not-a-Number. Actual: ' + (undefined - true));
+}
+
+//CHECK#3
+if (isNaN(new Boolean(true) - undefined) !== true) {
+  $ERROR('#3: new Boolean(true) - undefined === Not-a-Number. Actual: ' + (new Boolean(true) - undefined));
+}
+
+//CHECK#4
+if (isNaN(undefined - new Boolean(true)) !== true) {
+  $ERROR('#4: undefined - new Boolean(true) === Not-a-Number. Actual: ' + (undefined - new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.9.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.9.js
new file mode 100644
index 000000000..22bbe59e5
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A3_T2.9.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y returns ToNumber(x) - ToNumber(y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A3_T2.9.js
+ * @description Type(x) is different from Type(y) and both types vary between Boolean (primitive or object) and Null
+ */
+
+//CHECK#1
+if (true - null !== 1) {
+  $ERROR('#1: true - null === 1. Actual: ' + (true - null));
+}
+
+//CHECK#2
+if (null - true !== -1) {
+  $ERROR('#2: null - true === -1. Actual: ' + (null - true));
+}
+
+//CHECK#3
+if (new Boolean(true) - null !== 1) {
+  $ERROR('#3: new Boolean(true) - null === 1. Actual: ' + (new Boolean(true) - null));
+}
+
+//CHECK#4
+if (null - new Boolean(true) !== -1) {
+  $ERROR('#4: null - new Boolean(true) === -1. Actual: ' + (null - new Boolean(true)));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T1.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T1.js
new file mode 100644
index 000000000..2ea5c563c
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T1.js
@@ -0,0 +1,40 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T1.js
+ * @description If either operand is NaN, the result is NaN
+ */
+
+//CHECK#1
+if (isNaN(Number.NaN - 1) !== true ) {
+  $ERROR('#1: NaN - 1 === Not-a-Number. Actual: ' + (NaN - 1));
+}
+
+//CHECK#2
+if (isNaN(1 - Number.NaN) !== true ) {
+  $ERROR('#2: 1 - NaN === Not-a-Number. Actual: ' + (1 - NaN));
+}
+
+//CHECK#3
+if (isNaN(Number.NaN - Number.POSITIVE_INFINITY) !== true ) {
+  $ERROR('#3: NaN - Infinity === Not-a-Number. Actual: ' + (NaN - Infinity));
+}
+
+//CHECK#4
+if (isNaN(Number.POSITIVE_INFINITY - Number.NaN) !== true ) {
+  $ERROR('#4: Infinity - NaN === Not-a-Number. Actual: ' + (Infinity - NaN));
+}
+
+//CHECK#5
+if (isNaN(Number.NaN - Number.NEGATIVE_INFINITY) !== true ) {
+  $ERROR('#5: NaN - Infinity === Not-a-Number. Actual: ' + (NaN - Infinity));
+}
+
+//CHECK#6
+if (isNaN(Number.NEGATIVE_INFINITY - Number.NaN) !== true ) {
+  $ERROR('#6: Infinity - NaN === Not-a-Number. Actual: ' + (Infinity - NaN));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T2.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T2.js
new file mode 100644
index 000000000..3853092ca
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T2.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T2.js
+ * @description The difference of two infinities of opposite sign is the infinity of minuend sign
+ */
+
+//CHECK#1
+if (Number.POSITIVE_INFINITY - Number.NEGATIVE_INFINITY !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#1: Infinity - -Infinity === Infinity. Actual: ' + (Infinity - -Infinity));
+}
+
+//CHECK#2
+if (Number.NEGATIVE_INFINITY - Number.POSITIVE_INFINITY !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#2: -Infinity - Infinity === -Infinity. Actual: ' + (-Infinity - Infinity));
+}
+
+
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T3.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T3.js
new file mode 100644
index 000000000..e1c18e1cb
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T3.js
@@ -0,0 +1,23 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T3.js
+ * @description The difference of two infinities of the same sign is NaN
+ */
+
+//CHECK#1
+if (isNaN(Number.POSITIVE_INFINITY - Number.POSITIVE_INFINITY) !== true ) {
+  $ERROR('#1: Infinity - Infinity === Not-a-Number. Actual: ' + (Infinity - Infinity));
+}
+
+//CHECK#2
+if (isNaN(Number.NEGATIVE_INFINITY - Number.NEGATIVE_INFINITY) !== true ) {
+  $ERROR('#2: -Infinity - -Infinity === Not-a-Number. Actual: ' + (-Infinity - -Infinity));
+}
+
+
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T4.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T4.js
new file mode 100644
index 000000000..2a0ddf37b
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T4.js
@@ -0,0 +1,53 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T4.js
+ * @description The difference of an infinity and a finite value is equal to infinity of appropriate sign
+ */
+
+//CHECK#1
+if (Number.POSITIVE_INFINITY - 1 !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#1: Infinity - 1 === Infinity. Actual: ' + (Infinity - 1));
+}
+
+//CHECK#2
+if (-1 - Number.POSITIVE_INFINITY !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#2: -1 - Infinity === -Infinity. Actual: ' + (-1 - Infinity));
+}
+
+//CHECK#3
+if (Number.NEGATIVE_INFINITY - 1 !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#3: -Infinity - 1 === -Infinity. Actual: ' + (-Infinity - 1));
+}
+
+//CHECK#4
+if (-1 - Number.NEGATIVE_INFINITY !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#4: -1 - -Infinity === Infinity. Actual: ' + (-1 - -Infinity));
+}
+
+//CHECK#5
+if (Number.POSITIVE_INFINITY - Number.MAX_VALUE !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#5: Infinity - Number.MAX_VALUE === Infinity. Actual: ' + (Infinity - Number.MAX_VALUE));
+}
+
+//CHECK#6
+if (-Number.MAX_VALUE - Number.POSITIVE_INFINITY !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#6: -Number.MAX_VALUE - Infinity === I-nfinity. Actual: ' + (-Number.MAX_VALUE - Infinity));
+}
+
+//CHECK#7
+if (Number.NEGATIVE_INFINITY - Number.MAX_VALUE !== Number.NEGATIVE_INFINITY ) {
+  $ERROR('#7: -Infinity - Number.MAX_VALUE === -Infinity. Actual: ' + (-Infinity - Number.MAX_VALUE));
+}
+
+//CHECK#8
+if (-Number.MAX_VALUE - Number.NEGATIVE_INFINITY !== Number.POSITIVE_INFINITY ) {
+  $ERROR('#8: -Number.MAX_VALUE - -Infinity === Infinity. Actual: ' + (-Number.MAX_VALUE - -Infinity));
+}
+
+
+
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T5.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T5.js
new file mode 100644
index 000000000..bcc6ac258
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T5.js
@@ -0,0 +1,46 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T5.js
+ * @description Using the rule of sum of two zeroes and the fact that a - b = a + (-b)
+ */
+
+//CHECK#1
+if (-0 - -0 !== 0 ) {  
+  $ERROR('#1.1: -0 - -0 === 0. Actual: ' + (-0 - -0));
+} else {
+  if (1 / (-0 - -0) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#1.2: -0 - -0 === + 0. Actual: -0');
+  }
+}
+
+//CHECK#2
+if (0 - -0 !== 0 ) {  
+  $ERROR('#2.1: 0 - -0 === 0. Actual: ' + (0 - -0));
+} else {
+  if (1 / (0 - -0) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#2.2: 0 - -0 === + 0. Actual: -0');
+  }
+}
+
+//CHECK#3
+if (-0 - 0 !== -0 ) {  
+  $ERROR('#3.1: -0 - 0 === 0. Actual: ' + (-0 - 0));
+} else {
+  if (1 / (-0 - 0) !== Number.NEGATIVE_INFINITY) {
+    $ERROR('#3.2: -0 - 0 === - 0. Actual: +0');
+  }
+}
+
+//CHECK#4
+if (0 - 0 !== 0 ) {  
+  $ERROR('#4.1: 0 - 0 === 0. Actual: ' + (0 - 0));
+} else {
+  if (1 / (0 - 0) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#4.2: 0 - 0 === + 0. Actual: -0');
+  }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T6.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T6.js
new file mode 100644
index 000000000..a71e3068f
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T6.js
@@ -0,0 +1,50 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T6.js
+ * @description Using the rule of sum of a zero and a nonzero finite value and the fact that a - b = a + (-b)
+ */
+
+//CHECK#1
+if (1 - -0 !== 1 ) {  
+  $ERROR('#1: 1 - -0 === 1. Actual: ' + (1 - -0));
+}
+
+//CHECK#2
+if (1 - 0 !== 1 ) {  
+  $ERROR('#2: 1 - 0 === 1. Actual: ' + (1 - 0));
+} 
+
+//CHECK#3
+if (-0 - 1 !== -1 ) {  
+  $ERROR('#3: -0 - 1 === -1. Actual: ' + (-0 - 1));
+}
+
+//CHECK#4
+if (0 - 1 !== -1 ) {  
+  $ERROR('#4: 0 - 1 === -1. Actual: ' + (0 - 1));
+} 
+
+//CHECK#5
+if (Number.MAX_VALUE - -0 !== Number.MAX_VALUE ) {  
+  $ERROR('#5: Number.MAX_VALUE - -0 === Number.MAX_VALUE. Actual: ' + (Number.MAX_VALUE - -0));
+}
+
+//CHECK#6
+if (Number.MAX_VALUE - 0 !== Number.MAX_VALUE ) {  
+  $ERROR('#6: Number.MAX_VALUE - 0 === Number.MAX_VALUE. Actual: ' + (Number.MAX_VALUE - 0));
+} 
+
+//CHECK#7
+if (-0 - Number.MIN_VALUE !== -Number.MIN_VALUE ) {  
+  $ERROR('#7: -0 - Number.MIN_VALUE === -Number.MIN_VALUE. Actual: ' + (-0 - Number.MIN_VALUE));
+}
+
+//CHECK#8
+if (0 - Number.MIN_VALUE !== -Number.MIN_VALUE ) {  
+  $ERROR('#8: 0 - Number.MIN_VALUE === -Number.MIN_VALUE. Actual: ' + (0 - Number.MIN_VALUE));
+} 
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T7.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T7.js
new file mode 100644
index 000000000..8f810cb46
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T7.js
@@ -0,0 +1,37 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T7.js
+ * @description The mathematical difference of two nonzero finite values of the same magnitude and same sign is +0
+ */
+
+//CHECK#1
+if (Number.MIN_VALUE - Number.MIN_VALUE !== +0) {  
+  $ERROR('#1.1: Number.MIN_VALUE - Number.MIN_VALUE === 0. Actual: ' + (Number.MIN_VALUE - Number.MIN_VALUE));
+} else {
+  if (1 / (Number.MIN_VALUE - Number.MIN_VALUE) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#1.2: Number.MIN_VALUE - Number.MIN_VALUE === + 0. Actual: -0');
+  }
+}
+
+//CHECK#2
+if (-Number.MAX_VALUE - -Number.MAX_VALUE !== +0) {  
+  $ERROR('#2.2: -Number.MAX_VALUE - -Number.MAX_VALUE === 0. Actual: ' + (-Number.MAX_VALUE - -Number.MAX_VALUE));
+} else {
+  if (1 / (-Number.MAX_VALUE - -Number.MAX_VALUE) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#2.1: -Number.MAX_VALUE - -Number.MAX_VALUE === + 0. Actual: -0');
+  }
+}
+
+//CHECK#3
+if (1 / Number.MAX_VALUE - 1 / Number.MAX_VALUE !== +0) {  
+  $ERROR('#3.1: 1 / Number.MAX_VALUE - 1 / Number.MAX_VALUE === 0. Actual: ' + (1 / Number.MAX_VALUE - 1 / Number.MAX_VALUE));
+} else {
+  if (1 / (1 / Number.MAX_VALUE - 1 / Number.MAX_VALUE) !== Number.POSITIVE_INFINITY) {
+    $ERROR('#3.2: 1 / Number.MAX_VALUE - 1 / Number.MAX_VALUE === + 0. Actual: -0');
+  }
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T8.js b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T8.js
new file mode 100644
index 000000000..b8a5cd4e8
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/S11.6.2_A4_T8.js
@@ -0,0 +1,30 @@
+// Copyright 2009 the Sputnik authors.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/**
+ * Operator x - y produces the same result as x + (-y)
+ *
+ * @path ch11/11.6/11.6.2/S11.6.2_A4_T8.js
+ * @description If the magnitude is too large to represent, the operation overflows and the result is then an infinity of appropriate sign
+ */
+
+//CHECK#1
+if (Number.MAX_VALUE - -Number.MAX_VALUE !== Number.POSITIVE_INFINITY) {
+  $ERROR('#1: Number.MAX_VALUE - -Number.MAX_VALUE === Number.POSITIVE_INFINITY. Actual: ' + (Number.MAX_VALUE - -Number.MAX_VALUE));
+}
+
+//CHECK#2
+if (-Number.MAX_VALUE - Number.MAX_VALUE !== Number.NEGATIVE_INFINITY) {
+  $ERROR('#2: -Number.MAX_VALUE - umber.MAX_VALUE === Number.NEGATIVE_INFINITY. Actual: ' + (-Number.MAX_VALUE - umber.MAX_VALUE));
+}
+
+//CHECK#3
+if (1e+308 - -1e+308 !== Number.POSITIVE_INFINITY) {
+  $ERROR('#3: 1e+308 - -1e+308 === Number.POSITIVE_INFINITY. Actual: ' + (1e+308 - -1e+308));
+}
+
+//CHECK#4
+if (-8.99e+307 - 8.99e+307 !== Number.NEGATIVE_INFINITY) {
+  $ERROR('#4: -8.99e+307 - 8.99e+307 === Number.NEGATIVE_INFINITY. Actual: ' + (-8.99e+307 - 8.99e+307));
+}
+
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/browser.js b/js/src/tests/test262/ch11/11.6/11.6.2/browser.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/browser.js
diff --git a/js/src/tests/test262/ch11/11.6/11.6.2/shell.js b/js/src/tests/test262/ch11/11.6/11.6.2/shell.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/11.6.2/shell.js
diff --git a/js/src/tests/test262/ch11/11.6/browser.js b/js/src/tests/test262/ch11/11.6/browser.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/browser.js
diff --git a/js/src/tests/test262/ch11/11.6/shell.js b/js/src/tests/test262/ch11/11.6/shell.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/tests/test262/ch11/11.6/shell.js