Add m-esr52 at 52.6.0

28 files changed, 1361 insertions, 0 deletions

diff --git a/js/src/tests/ecma_5/Array/browser.js b/js/src/tests/ecma_5/Array/browser.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/browser.js
diff --git a/js/src/tests/ecma_5/Array/frozen-dense-array.js b/js/src/tests/ecma_5/Array/frozen-dense-array.js
new file mode 100644
index 000000000..9db63036f
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/frozen-dense-array.js
@@ -0,0 +1,61 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Author: Emilio Cobos Álvarez <ecoal95@gmail.com>
+ */
+var BUGNUMBER = 1310744;
+var summary = "Dense array properties shouldn't be modified when they're frozen";
+
+print(BUGNUMBER + ": " + summary);
+
+var a = Object.freeze([4, 5, 1]);
+
+function assertArrayIsExpected() {
+  assertEq(a.length, 3);
+  assertEq(a[0], 4);
+  assertEq(a[1], 5);
+  assertEq(a[2], 1);
+}
+
+assertThrowsInstanceOf(() => a.reverse(), TypeError);
+assertThrowsInstanceOf(() => a.shift(), TypeError);
+assertThrowsInstanceOf(() => a.unshift(0), TypeError);
+assertThrowsInstanceOf(() => a.sort(function() {}), TypeError);
+assertThrowsInstanceOf(() => a.pop(), TypeError);
+assertThrowsInstanceOf(() => a.fill(0), TypeError);
+assertThrowsInstanceOf(() => a.splice(0, 1, 1), TypeError);
+assertThrowsInstanceOf(() => a.push("foo"), TypeError);
+assertThrowsInstanceOf(() => { "use strict"; a.length = 5; }, TypeError);
+assertThrowsInstanceOf(() => { "use strict"; a[2] = "foo"; }, TypeError);
+assertThrowsInstanceOf(() => { "use strict"; delete a[0]; }, TypeError);
+assertThrowsInstanceOf(() => a.splice(Math.a), TypeError);
+
+// Shouldn't throw, since this is not strict mode, but shouldn't change the
+// value of the property.
+a.length = 5;
+a[2] = "foo";
+assertEq(delete a[0], false);
+
+assertArrayIsExpected();
+
+var watchpointCalled = false;
+// NOTE: Be careful with the position of this test, since this sparsifies the
+// elements and you might not test what you think you're testing otherwise.
+a.watch(2, function(prop, oldValue, newValue) {
+  watchpointCalled = true;
+  assertEq(prop, 2);
+  assertEq(oldValue, 1);
+  assertEq(newValue, "foo");
+});
+
+assertArrayIsExpected();
+
+a.length = 5;
+a[2] = "foo";
+assertEq(watchpointCalled, true);
+assertEq(delete a[0], false);
+
+assertArrayIsExpected();
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
diff --git a/js/src/tests/ecma_5/Array/frozen-dict-mode-length.js b/js/src/tests/ecma_5/Array/frozen-dict-mode-length.js
new file mode 100644
index 000000000..e519b5892
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/frozen-dict-mode-length.js
@@ -0,0 +1,18 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Author: Emilio Cobos Álvarez <ecoal95@gmail.com>
+ */
+var BUGNUMBER = 1312948;
+var summary = "Freezing a dictionary mode object with a length property should make Object.isFrozen report true";
+
+print(BUGNUMBER + ": " + summary);
+
+/* Convert to dictionary mode */
+delete Array.prototype.slice;
+
+Object.freeze(Array.prototype);
+assertEq(Object.isFrozen(Array.prototype), true);
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
diff --git a/js/src/tests/ecma_5/Array/index-with-null-character.js b/js/src/tests/ecma_5/Array/index-with-null-character.js
new file mode 100644
index 000000000..51e71bc8a
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/index-with-null-character.js
@@ -0,0 +1,18 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var testArray = [1, 2, 3]
+assertEq(testArray['0' + '\0'], undefined);
+assertEq(testArray['1' + '\0' + 'aaaa'], undefined)
+assertEq(testArray['\0' + '2'], undefined);
+assertEq(testArray['\0' + ' 2'], undefined);
+
+testArray['\0'] = 'hello';
+testArray[' \0'] = 'world';
+assertEq(testArray['\0'], 'hello');
+assertEq(testArray[' \0'], 'world');
+
+if (typeof reportCompare == 'function')
+    reportCompare(true, true);
diff --git a/js/src/tests/ecma_5/Array/join-01.js b/js/src/tests/ecma_5/Array/join-01.js
new file mode 100644
index 000000000..3cc6cccd0
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/join-01.js
@@ -0,0 +1,83 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+print("ES5: Array.prototype.join");
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var count;
+var stringifyCounter = { toString: function() { count++; return "obj"; } };
+
+var arr = [1, 2, 3, 4, 5];
+assertEq(arr.join(), "1,2,3,4,5");
+assertEq(arr.join(","), "1,2,3,4,5");
+assertEq(arr.join(undefined), "1,2,3,4,5");
+assertEq(arr.join(4), "142434445");
+assertEq(arr.join(""), "12345");
+
+count = 0;
+assertEq(arr.join(stringifyCounter), "1obj2obj3obj4obj5");
+assertEq(count, 1);
+
+var holey = [1, 2, , 4, 5];
+assertEq(holey.join(), "1,2,,4,5");
+assertEq(holey.join(","), "1,2,,4,5");
+assertEq(holey.join(undefined), "1,2,,4,5");
+assertEq(holey.join(4), "14244445");
+
+count = 0;
+assertEq(holey.join(stringifyCounter), "1obj2objobj4obj5");
+assertEq(count, 1);
+
+var nully = [1, 2, 3, null, 5];
+assertEq(nully.join(), "1,2,3,,5");
+assertEq(nully.join(","), "1,2,3,,5");
+assertEq(nully.join(undefined), "1,2,3,,5");
+assertEq(nully.join(4), "14243445");
+
+count = 0;
+assertEq(nully.join(stringifyCounter), "1obj2obj3objobj5");
+assertEq(count, 1);
+
+var undefiney = [1, undefined, 3, 4, 5];
+assertEq(undefiney.join(), "1,,3,4,5");
+assertEq(undefiney.join(","), "1,,3,4,5");
+assertEq(undefiney.join(undefined), "1,,3,4,5");
+assertEq(undefiney.join(4), "14434445");
+
+count = 0;
+assertEq(undefiney.join(stringifyCounter), "1objobj3obj4obj5");
+assertEq(count, 1);
+
+var log = '';
+arr = {length: {valueOf: function () { log += "L"; return 2; }},
+      0: "x", 1: "z"};
+var sep = {toString: function () { log += "S"; return "y"; }};
+assertEq(Array.prototype.join.call(arr, sep), "xyz");
+assertEq(log, "LS");
+
+var funky =
+  {
+    toString: function()
+    {
+      Array.prototype[1] = "chorp";
+      Object.prototype[3] = "fnord";
+      return "funky";
+    }
+  };
+var trailingHoles = [0, funky, /* 2 */, /* 3 */,];
+assertEq(trailingHoles.join(""), "0funkyfnord");
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/length-01.js b/js/src/tests/ecma_5/Array/length-01.js
new file mode 100644
index 000000000..4fe81e2b6
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/length-01.js
@@ -0,0 +1,71 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 600392;
+var summary =
+  'Object.preventExtensions([]).length = 0 should do nothing, not throw';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+
+function testEmpty()
+{
+  var a = [];
+  assertEq(a.length, 0);
+  assertEq(Object.preventExtensions(a), a);
+  assertEq(a.length, 0);
+  a.length = 0;
+  assertEq(a.length, 0);
+}
+testEmpty();
+
+function testEmptyStrict()
+{
+  "use strict";
+  var a = [];
+  assertEq(a.length, 0);
+  assertEq(Object.preventExtensions(a), a);
+  assertEq(a.length, 0);
+  a.length = 0;
+  assertEq(a.length, 0);
+}
+testEmptyStrict();
+
+function testNonEmpty()
+{
+  var a = [1, 2, 3];
+  assertEq(a.length, 3);
+  assertEq(Object.preventExtensions(a), a);
+  assertEq(a.length, 3);
+  a.length = 0;
+  assertEq(a.length, 0);
+}
+testNonEmpty();
+
+function testNonEmptyStrict()
+{
+  "use strict";
+  var a = [1, 2, 3];
+  assertEq(a.length, 3);
+  assertEq(Object.preventExtensions(a), a);
+  assertEq(a.length, 3);
+  a.length = 0;
+  assertEq(a.length, 0);
+}
+testNonEmptyStrict();
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");
diff --git a/js/src/tests/ecma_5/Array/length-nonwritable-redefine-nop.js b/js/src/tests/ecma_5/Array/length-nonwritable-redefine-nop.js
new file mode 100644
index 000000000..1d7fe32c8
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/length-nonwritable-redefine-nop.js
@@ -0,0 +1,70 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 858381;
+var summary = "No-op array length redefinition";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var arr;
+
+// initializedLength == capacity == length
+// 6 == 6 == 6
+arr = Object.defineProperty([0, 1, 2, 3, 4, 5], "length", { writable: false });
+Object.defineProperty(arr, "length", { value: 6 });
+Object.defineProperty(arr, "length", { writable: false });
+Object.defineProperty(arr, "length", { configurable: false });
+Object.defineProperty(arr, "length", { writable: false, configurable: false });
+Object.defineProperty(arr, "length", { writable: false, value: 6 });
+Object.defineProperty(arr, "length", { configurable: false, value: 6 });
+Object.defineProperty(arr, "length", { writable: false, configurable: false, value: 6 });
+
+// initializedLength == capacity < length
+// 6 == 6 < 8
+arr = Object.defineProperty([0, 1, 2, 3, 4, 5], "length", { value: 8, writable: false });
+Object.defineProperty(arr, "length", { value: 8 });
+Object.defineProperty(arr, "length", { writable: false });
+Object.defineProperty(arr, "length", { configurable: false });
+Object.defineProperty(arr, "length", { writable: false, configurable: false });
+Object.defineProperty(arr, "length", { writable: false, value: 8 });
+Object.defineProperty(arr, "length", { configurable: false, value: 8 });
+Object.defineProperty(arr, "length", { writable: false, configurable: false, value: 8 });
+
+// initializedLength < capacity == length
+// 7 < 8 == 8
+arr = Object.defineProperty([0, 1, 2, 3, 4, 5, 6, /* hole */, ], "length",
+                            { value: 8, writable: false });
+Object.defineProperty(arr, "length", { value: 8 });
+Object.defineProperty(arr, "length", { writable: false });
+Object.defineProperty(arr, "length", { configurable: false });
+Object.defineProperty(arr, "length", { writable: false, configurable: false });
+Object.defineProperty(arr, "length", { writable: false, value: 8 });
+Object.defineProperty(arr, "length", { configurable: false, value: 8 });
+Object.defineProperty(arr, "length", { writable: false, configurable: false, value: 8 });
+
+// initializedLength < capacity < length
+// 3 < 6 < 8
+arr = Object.defineProperty([0, 1, 2], "length", { value: 8, writable: false });
+Object.defineProperty(arr, "length", { value: 8 });
+Object.defineProperty(arr, "length", { writable: false });
+Object.defineProperty(arr, "length", { configurable: false });
+Object.defineProperty(arr, "length", { writable: false, configurable: false });
+Object.defineProperty(arr, "length", { writable: false, value: 8 });
+Object.defineProperty(arr, "length", { configurable: false, value: 8 });
+Object.defineProperty(arr, "length", { writable: false, configurable: false, value: 8 });
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/length-set-object.js b/js/src/tests/ecma_5/Array/length-set-object.js
new file mode 100644
index 000000000..bf80b592e
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/length-set-object.js
@@ -0,0 +1,68 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 657298;
+var summary = 'Various quirks of setting array length properties to objects';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+function invokeConversionTwice1()
+{
+  var count = 0;
+  [].length = { valueOf: function() { count++; return 1; } };
+  assertEq(count, 2);
+}
+invokeConversionTwice1();
+
+function invokeConversionTwice2()
+{
+  var count = 0;
+  [].length = { toString: function() { count++; return 1; }, valueOf: null };
+  assertEq(count, 2);
+}
+invokeConversionTwice2();
+
+function dontOverwriteError1()
+{
+  try
+  {
+    [].length = { valueOf: {}, toString: {} };
+    throw new Error("didn't throw a TypeError");
+  }
+  catch (e)
+  {
+    assertEq(e instanceof TypeError, true,
+             "expected a TypeError running out of conversion options, got " + e);
+  }
+}
+dontOverwriteError1();
+
+function dontOverwriteError2()
+{
+  try
+  {
+    [].length = { valueOf: function() { throw "error"; } };
+    throw new Error("didn't throw a TypeError");
+  }
+  catch (e)
+  {
+    assertEq(e, "error", "expected 'error' from failed conversion, got " + e);
+  }
+}
+dontOverwriteError2();
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");
diff --git a/js/src/tests/ecma_5/Array/length-truncate-nonconfigurable-sparse.js b/js/src/tests/ecma_5/Array/length-truncate-nonconfigurable-sparse.js
new file mode 100644
index 000000000..a51fd4089
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/length-truncate-nonconfigurable-sparse.js
@@ -0,0 +1,110 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 858381;
+var summary =
+  "Array length redefinition behavior with non-configurable elements";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+function addDataProperty(obj, prop, value, enumerable, configurable, writable)
+{
+  var desc =
+    { enumerable: enumerable,
+      configurable: configurable,
+      writable: writable,
+      value: value };
+  Object.defineProperty(obj, prop, desc);
+}
+
+function nonstrict()
+{
+  var arr = [0, , 2, , , 5];
+
+  addDataProperty(arr,  31415926, "foo", true,  true,  true);
+  addDataProperty(arr, 123456789, "bar", true,  true,  false);
+  addDataProperty(arr,   8675309, "qux", false, true,  true);
+  addDataProperty(arr,   1735039, "eit", false, true,  false);
+  addDataProperty(arr, 987654321, "fun", false, true,  false);
+
+  // non-array indexes to spice things up
+  addDataProperty(arr, "foopy", "sdfsd", false, false, false);
+  addDataProperty(arr, 4294967296, "psych", true, false, false);
+  addDataProperty(arr, 4294967295, "psych", true, false, false);
+
+  addDataProperty(arr,  27182818, "eep", false, false, false);
+
+  // Truncate...but only as far as possible.
+  arr.length = 1;
+
+  assertEq(arr.length, 27182819);
+
+  var props = Object.getOwnPropertyNames(arr).sort();
+  var expected =
+    ["0", "2", "5", "1735039", "8675309", "27182818",
+     "foopy", "4294967296", "4294967295", "length"].sort();
+
+  assertEq(props.length, expected.length);
+  for (var i = 0; i < props.length; i++)
+    assertEq(props[i], expected[i], "unexpected property: " + props[i]);
+}
+nonstrict();
+
+function strict()
+{
+  "use strict";
+
+  var arr = [0, , 2, , , 5];
+
+  addDataProperty(arr,  31415926, "foo", true,  true,  true);
+  addDataProperty(arr, 123456789, "bar", true,  true,  false);
+  addDataProperty(arr,   8675309, "qux", false, true,  true);
+  addDataProperty(arr,   1735039, "eit", false, true,  false);
+  addDataProperty(arr, 987654321, "fun", false, true,  false);
+
+  // non-array indexes to spice things up
+  addDataProperty(arr, "foopy", "sdfsd", false, false, false);
+  addDataProperty(arr, 4294967296, "psych", true, false, false);
+  addDataProperty(arr, 4294967295, "psych", true, false, false);
+
+  addDataProperty(arr,  27182818, "eep", false, false, false);
+
+  try
+  {
+    arr.length = 1;
+    throw new Error("didn't throw?!");
+  }
+  catch (e)
+  {
+    assertEq(e instanceof TypeError, true,
+             "non-configurable property should trigger TypeError, got " + e);
+  }
+
+  assertEq(arr.length, 27182819);
+
+  var props = Object.getOwnPropertyNames(arr).sort();
+  var expected =
+    ["0", "2", "5", "1735039", "8675309", "27182818",
+     "foopy", "4294967296", "4294967295", "length"].sort();
+
+  assertEq(props.length, expected.length);
+  for (var i = 0; i < props.length; i++)
+    assertEq(props[i], expected[i], "unexpected property: " + props[i]);
+}
+strict();
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js b/js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js
new file mode 100644
index 000000000..e9a66fe0a
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/length-truncate-nonconfigurable.js
@@ -0,0 +1,48 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 858381;
+var summary =
+  "Array length redefinition behavior with non-configurable elements";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var arr = [0, 1, 2];
+Object.defineProperty(arr, 1, { configurable: false });
+
+try
+{
+  Object.defineProperty(arr, "length", { value: 0, writable: false });
+}
+catch (e)
+{
+  assertEq(e instanceof TypeError, true,
+           "must throw TypeError when array truncation would have to remove " +
+           "non-configurable elements");
+}
+
+assertEq(arr.length, 2, "length is highest remaining index plus one");
+
+var desc = Object.getOwnPropertyDescriptor(arr, "length");
+assertEq(desc !== undefined, true);
+
+assertEq(desc.value, 2);
+assertEq(desc.writable, false);
+assertEq(desc.enumerable, false);
+assertEq(desc.configurable, false);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/length-truncate-with-indexed.js b/js/src/tests/ecma_5/Array/length-truncate-with-indexed.js
new file mode 100644
index 000000000..9e4da812a
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/length-truncate-with-indexed.js
@@ -0,0 +1,101 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 858381;
+var summary =
+  "Array length setting/truncating with non-dense, indexed elements";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+function testTruncateDenseAndSparse()
+{
+  var arr;
+
+  // initialized length 16, capacity same
+  arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
+
+  // plus a sparse element
+  arr[987654321] = 987654321;
+
+  // lop off the sparse element and half the dense elements, shrink capacity
+  arr.length = 8;
+
+  assertEq(987654321 in arr, false);
+  assertEq(arr[987654321], undefined);
+  assertEq(arr.length, 8);
+}
+testTruncateDenseAndSparse();
+
+function testTruncateSparse()
+{
+  // initialized length 8, capacity same
+  var arr = [0, 1, 2, 3, 4, 5, 6, 7];
+
+  // plus a sparse element
+  arr[987654321] = 987654321;
+
+  // lop off the sparse element, leave initialized length/capacity unchanged
+  arr.length = 8;
+
+  assertEq(987654321 in arr, false);
+  assertEq(arr[987654321], undefined);
+  assertEq(arr.length, 8);
+}
+testTruncateSparse();
+
+function testTruncateDenseAndSparseShrinkCapacity()
+{
+  // initialized length 11, capacity...somewhat larger, likely 16
+  var arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+
+  // plus a sparse element
+  arr[987654321] = 987654321;
+
+  // lop off the sparse element, reduce initialized length, reduce capacity
+  arr.length = 8;
+
+  assertEq(987654321 in arr, false);
+  assertEq(arr[987654321], undefined);
+  assertEq(arr.length, 8);
+}
+testTruncateDenseAndSparseShrinkCapacity();
+
+function testTruncateSparseShrinkCapacity()
+{
+  // initialized length 8, capacity same
+  var arr = [0, 1, 2, 3, 4, 5, 6, 7];
+
+  // capacity expands to accommodate, initialized length remains same (not equal
+  // to capacity or length)
+  arr[15] = 15;
+
+  // now no elements past initialized length
+  delete arr[15];
+
+  // ...except a sparse element
+  arr[987654321] = 987654321;
+
+  // trims sparse element, doesn't change initialized length, shrinks capacity
+  arr.length = 8;
+
+  assertEq(987654321 in arr, false);
+  assertEq(arr[987654321], undefined);
+  assertEq(arr.length, 8);
+}
+testTruncateSparseShrinkCapacity();
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/pop-empty-nonwritable.js b/js/src/tests/ecma_5/Array/pop-empty-nonwritable.js
new file mode 100644
index 000000000..f42ca98f5
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/pop-empty-nonwritable.js
@@ -0,0 +1,32 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 858381;
+var summary = 'Object.freeze([]).pop() must throw a TypeError';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+try
+{
+  Object.freeze([]).pop();
+  throw new Error("didn't throw");
+}
+catch (e)
+{
+  assertEq(e instanceof TypeError, true,
+           "should have thrown TypeError, instead got: " + e);
+}
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/pop-nonarray-higher-elements.js b/js/src/tests/ecma_5/Array/pop-nonarray-higher-elements.js
new file mode 100644
index 000000000..052eb4230
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/pop-nonarray-higher-elements.js
@@ -0,0 +1,91 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 909602;
+var summary =
+  "Array.prototype.pop shouldn't touch elements greater than length on " +
+  "non-arrays";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+function doTest(obj, index)
+{
+  // print("testing " + JSON.stringify(obj) + " with index " + index);
+  assertEq(Array.prototype.pop.call(obj), undefined);
+  assertEq(index in obj, true);
+  assertEq(obj[index], 42);
+}
+
+// not-super-much-later element
+
+// non-zero length
+function testPop1()
+{
+  var obj = { length: 2, 3: 42 };
+  doTest(obj, 3);
+}
+for (var i = 0; i < 50; i++)
+  testPop1();
+
+// zero length
+function testPop2()
+{
+  var obj = { length: 0, 3: 42 };
+  doTest(obj, 3);
+}
+for (var i = 0; i < 50; i++)
+  testPop2();
+
+// much-later (but dense) element
+
+// non-zero length
+function testPop3()
+{
+  var obj = { length: 2, 55: 42 };
+  doTest(obj, 55);
+}
+for (var i = 0; i < 50; i++)
+  testPop3();
+
+// zero length
+function testPop4()
+{
+  var obj = { length: 0, 55: 42 };
+  doTest(obj, 55);
+}
+for (var i = 0; i < 50; i++)
+  testPop4();
+
+// much much much later (sparse) element
+
+// non-zero length
+function testPop5()
+{
+  var obj = { length: 2, 65530: 42 };
+  doTest(obj, 65530);
+}
+for (var i = 0; i < 50; i++)
+  testPop5();
+
+// zero length
+function testPop6()
+{
+  var obj = { length: 0, 65530: 42 };
+  doTest(obj, 65530);
+}
+for (var i = 0; i < 50; i++)
+  testPop6();
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/redefine-length-frozen-array.js b/js/src/tests/ecma_5/Array/redefine-length-frozen-array.js
new file mode 100644
index 000000000..ca3b43018
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/redefine-length-frozen-array.js
@@ -0,0 +1,26 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 866580;
+var summary = "Assertion redefining length property of a frozen array";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var arr = Object.freeze([]);
+Object.defineProperty(arr, "length", {});
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/redefine-length-frozen-dictionarymode-array.js b/js/src/tests/ecma_5/Array/redefine-length-frozen-dictionarymode-array.js
new file mode 100644
index 000000000..bca6e0cd7
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/redefine-length-frozen-dictionarymode-array.js
@@ -0,0 +1,36 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 880591;
+var summary =
+  "Assertion redefining length property of a frozen dictionary-mode array";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+function convertToDictionaryMode(arr)
+{
+  Object.defineProperty(arr, 0, { configurable: true });
+  Object.defineProperty(arr, 1, { configurable: true });
+  delete arr[0];
+}
+
+var arr = [];
+convertToDictionaryMode(arr);
+Object.freeze(arr);
+Object.defineProperty(arr, "length", {});
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/redefine-nonwritable-length-custom-conversion-call-counts.js b/js/src/tests/ecma_5/Array/redefine-nonwritable-length-custom-conversion-call-counts.js
new file mode 100644
index 000000000..b77f39675
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/redefine-nonwritable-length-custom-conversion-call-counts.js
@@ -0,0 +1,45 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 866700;
+var summary = "Assertion redefining non-writable length to a non-numeric value";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var count = 0;
+
+var convertible =
+  {
+    valueOf: function()
+    {
+      count++;
+      return 0;
+    }
+  };
+
+var arr = [];
+Object.defineProperty(arr, "length", { value: 0, writable: false });
+
+Object.defineProperty(arr, "length", { value: convertible });
+assertEq(count, 2);
+
+Object.defineProperty(arr, "length", { value: convertible });
+assertEq(count, 4);
+
+assertEq(arr.length, 0);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/redefine-nonwritable-length-custom-conversion-throw.js b/js/src/tests/ecma_5/Array/redefine-nonwritable-length-custom-conversion-throw.js
new file mode 100644
index 000000000..f3003a6bd
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/redefine-nonwritable-length-custom-conversion-throw.js
@@ -0,0 +1,58 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 866700;
+var summary = "Assertion redefining non-writable length to a non-numeric value";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var count = 0;
+
+var convertible =
+  {
+    valueOf: function()
+    {
+      count++;
+      if (count > 2)
+        return 0;
+      throw new SyntaxError("fnord");
+    }
+  };
+
+var arr = [];
+Object.defineProperty(arr, "length", { value: 0, writable: false });
+
+try
+{
+  Object.defineProperty(arr, "length",
+                        {
+                          value: convertible,
+                          writable: true,
+                          configurable: true,
+                          enumerable: true
+                        });
+  throw new Error("didn't throw");
+}
+catch (e)
+{
+  assertEq(e instanceof SyntaxError, true, "expected SyntaxError, got " + e);
+}
+
+assertEq(count, 1);
+assertEq(arr.length, 0);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/redefine-nonwritable-length-nonnumeric.js b/js/src/tests/ecma_5/Array/redefine-nonwritable-length-nonnumeric.js
new file mode 100644
index 000000000..aab9c1d5d
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/redefine-nonwritable-length-nonnumeric.js
@@ -0,0 +1,32 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 866700;
+var summary = "Assertion redefining non-writable length to a non-numeric value";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var arr = [];
+Object.defineProperty(arr, "length", { value: 0, writable: false });
+
+// Per Array's magical behavior, the value in the descriptor gets canonicalized
+// *before* SameValue comparisons occur, so this shouldn't throw.
+Object.defineProperty(arr, "length", { value: '' });
+
+assertEq(arr.length, 0);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/regress-599159.js b/js/src/tests/ecma_5/Array/regress-599159.js
new file mode 100644
index 000000000..bd8225b52
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/regress-599159.js
@@ -0,0 +1,10 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var b = Object.create(Array.prototype);
+b.length = 12;
+assertEq(b.length, 12);
+
+reportCompare(true,true);
diff --git a/js/src/tests/ecma_5/Array/reverse-order-of-low-high-accesses.js b/js/src/tests/ecma_5/Array/reverse-order-of-low-high-accesses.js
new file mode 100644
index 000000000..a9b1e80de
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/reverse-order-of-low-high-accesses.js
@@ -0,0 +1,88 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 858677;
+var summary =
+  "[].reverse should swap elements low to high using accesses to low " +
+  "elements, then accesses to high elements";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var observed = [];
+
+// (0, 7) hits the lowerExists/upperExists case.
+// (1, 6) hits the !lowerExists/upperExists case.
+// (2, 5) hits the lowerExists/!upperExists case.
+// (3, 4) hits the !lowerExists/!upperExists case.
+//
+// It'd be a good idea to have a second version of this test at some point
+// where the "array" being reversed is a proxy, to detect proper ordering of
+// getproperty, hasproperty, setproperty into a hole, and deleteproperty from a
+// non-configurable element.  But at present our Array.prototype.reverse
+// implementation probably doesn't conform fully to all this (because our
+// internal MOP is still slightly off), so punt for now.
+var props =
+  {
+    0: {
+      configurable: true,
+      get: function() { observed.push("index 0 get"); return "index 0 get"; },
+      set: function(v) { observed.push("index 0 set: " + v); }
+    },
+    /* 1: hole */
+    2: {
+      configurable: true,
+      get: function() { observed.push("index 2 get"); return "index 2 get"; },
+      set: function(v) { observed.push("index 2 set: " + v); }
+    },
+    /* 3: hole */
+    /* 4: hole */
+    /* 5: hole */
+    6: {
+      configurable: true,
+      get: function() { observed.push("index 6 get"); return "index 6 get"; },
+      set: function(v) { observed.push("index 6 set: " + v); }
+    },
+    7: {
+      configurable: true,
+      get: function() { observed.push("index 7 get"); return "index 7 get"; },
+      set: function(v) { observed.push("index 7 set: " + v); }
+    },
+  };
+
+var arr = Object.defineProperties(new Array(8), props);
+
+arr.reverse();
+
+var expectedObserved =
+  ["index 0 get", "index 7 get", "index 0 set: index 7 get", "index 7 set: index 0 get",
+   "index 6 get",
+   "index 2 get"
+   /* nothing for 3/4 */];
+print(observed);
+// Do this before the assertions below futz even more with |observed|.
+assertEq(observed.length, expectedObserved.length);
+for (var i = 0; i < expectedObserved.length; i++)
+  assertEq(observed[i], expectedObserved[i]);
+
+assertEq(arr[0], "index 0 get"); // no deletion, setting doesn't overwrite
+assertEq(arr[1], "index 6 get"); // copies result of getter
+assertEq(2 in arr, false); // deleted
+assertEq(3 in arr, false); // never there
+assertEq(4 in arr, false); // never there
+assertEq(arr[5], "index 2 get"); // copies result of getter
+assertEq(6 in arr, false); // deleted
+assertEq(arr[7], "index 7 get"); // no deletion, setter doesn't overwrite
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/shell.js b/js/src/tests/ecma_5/Array/shell.js
new file mode 100644
index 000000000..e69de29bb
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/shell.js
diff --git a/js/src/tests/ecma_5/Array/sort-01.js b/js/src/tests/ecma_5/Array/sort-01.js
new file mode 100644
index 000000000..da90220ae
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/sort-01.js
@@ -0,0 +1,23 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 604971;
+var summary = 'array.sort compare-function gets incorrect this';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+[1, 2, 3].sort(function() { "use strict"; assertEq(this, undefined); });
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");
diff --git a/js/src/tests/ecma_5/Array/sort-array-with-holes-and-undefined.js b/js/src/tests/ecma_5/Array/sort-array-with-holes-and-undefined.js
new file mode 100644
index 000000000..b77c6d341
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/sort-array-with-holes-and-undefined.js
@@ -0,0 +1,32 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 664528;
+var summary =
+  "Sorting an array containing only holes and |undefined| should move all " +
+  "|undefined| to the start of the array";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var a = [, , , undefined];
+a.sort();
+
+assertEq(a.hasOwnProperty(0), true);
+assertEq(a[0], undefined);
+assertEq(a.hasOwnProperty(1), false);
+assertEq(a.hasOwnProperty(2), false);
+assertEq(a.hasOwnProperty(3), false);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/splice-return-array-elements-defined-not-set.js b/js/src/tests/ecma_5/Array/splice-return-array-elements-defined-not-set.js
new file mode 100644
index 000000000..2f5eca610
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/splice-return-array-elements-defined-not-set.js
@@ -0,0 +1,46 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 668024;
+var summary =
+  'Array.prototype.splice should define, not set, the elements of the array ' +
+  'it returns';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+Object.defineProperty(Object.prototype, 2,
+  {
+    set: function(v)
+    {
+      throw new Error("setter on Object.prototype called!");
+    },
+    get: function() { return "fnord"; },
+    enumerable: false,
+    configurable: true
+  });
+
+var arr = [0, 1, 2, 3, 4, 5];
+var removed = arr.splice(0, 6);
+
+assertEq(arr.length, 0);
+assertEq(removed.length, 6);
+assertEq(removed[0], 0);
+assertEq(removed[1], 1);
+assertEq(removed[2], 2);
+assertEq(removed[3], 3);
+assertEq(removed[4], 4);
+assertEq(removed[5], 5);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/splice-suppresses-unvisited-indexes.js b/js/src/tests/ecma_5/Array/splice-suppresses-unvisited-indexes.js
new file mode 100644
index 000000000..717116fa0
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/splice-suppresses-unvisited-indexes.js
@@ -0,0 +1,61 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 668024;
+var summary =
+  'Array.prototype.splice, when it deletes elements, should make sure any ' +
+  'deleted but not visited elements are suppressed from subsequent enumeration';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var arr = [0, 1, 2, 3, 4, 5, , 7];
+
+var seen = [];
+var sawOneBeforeThree = true;
+for (var p in arr)
+{
+  if (p === "1")
+  {
+    // The order of enumeration of properties is unspecified, so technically,
+    // it would be kosher to enumerate "1" last, say, such that all properties
+    // in the array actually were enumerated, including an index which splice
+    // would delete.  Don't flag that case as a failure.  (SpiderMonkey doesn't
+    // do this, and neither do any of the other browser engines, but it is
+    // permissible behavior.)
+    if (seen.indexOf("3") >= 0)
+    {
+      sawOneBeforeThree = false;
+      break;
+    }
+
+    arr.splice(2, 3);
+  }
+
+  seen.push(p);
+}
+
+if (sawOneBeforeThree)
+{
+  // ES5 12.6.4 states:
+  //
+  //   If a property that has not yet been visited during enumeration is
+  //   deleted, then it will not be visited.
+  //
+  // So if we haven't seen "3" by the time we see "1", the splice call above
+  // will delete "3", and therefore we must not see it.
+  assertEq(seen.indexOf("3"), -1);
+}
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");
diff --git a/js/src/tests/ecma_5/Array/toLocaleString-01.js b/js/src/tests/ecma_5/Array/toLocaleString-01.js
new file mode 100644
index 000000000..458283e63
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/toLocaleString-01.js
@@ -0,0 +1,36 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 562446;
+var summary = 'ES5: Array.prototype.toLocaleString';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var o;
+
+o = { length: 2, 0: 7, 1: { toLocaleString: function() { return "baz" } } };
+assertEq(Array.prototype.toLocaleString.call(o), "7,baz");
+
+o = {};
+assertEq(Array.prototype.toLocaleString.call(o), "");
+
+var log = '';
+arr = {length: {valueOf: function () { log += "L"; return 2; }},
+      0: "x", 1: "z"};
+assertEq(Array.prototype.toLocaleString.call(arr), "x,z");
+assertEq(log, "L");
+
+/******************************************************************************/
+
+reportCompare(true, true);
+
+print("All tests passed!");
diff --git a/js/src/tests/ecma_5/Array/toString-01.js b/js/src/tests/ecma_5/Array/toString-01.js
new file mode 100644
index 000000000..a92fe6369
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/toString-01.js
@@ -0,0 +1,52 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Jeff Walden <jwalden+code@mit.edu>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 562446;
+var summary = 'ES5: Array.prototype.toString';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+var o;
+
+o = { join: function() { assertEq(arguments.length, 0); return "ohai"; } };
+assertEq(Array.prototype.toString.call(o), "ohai");
+
+o = {};
+assertEq(Array.prototype.toString.call(o), "[object Object]");
+
+Array.prototype.join = function() { return "kthxbai"; };
+assertEq(Array.prototype.toString.call([]), "kthxbai");
+
+o = { join: 17 };
+assertEq(Array.prototype.toString.call(o), "[object Object]");
+
+o = { get join() { throw 42; } };
+try
+{
+  var str = Array.prototype.toString.call(o);
+  assertEq(true, false,
+           "expected an exception calling [].toString on an object with a " +
+           "join getter that throws, got " + str + " instead");
+}
+catch (e)
+{
+  assertEq(e, 42,
+           "expected thrown e === 42 when calling [].toString on an object " +
+           "with a join getter that throws, got " + e);
+}
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");
diff --git a/js/src/tests/ecma_5/Array/unshift-01.js b/js/src/tests/ecma_5/Array/unshift-01.js
new file mode 100644
index 000000000..84c9d88a5
--- /dev/null
+++ b/js/src/tests/ecma_5/Array/unshift-01.js
@@ -0,0 +1,45 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 614070;
+var summary = 'Array.prototype.unshift without args';
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+// ES6 ToLength clamps length values to 2^53 - 1.
+// We currently clamp to 2^32 - 1 instead. See bug 924058.
+var MAX_LENGTH = 0xffffffff;
+
+var a = {};
+a.length = MAX_LENGTH + 1;
+assertEq([].unshift.call(a), MAX_LENGTH);
+assertEq(a.length, MAX_LENGTH);
+
+function testGetSet(len, expected) {
+    var newlen;
+    var a = { get length() { return len; }, set length(v) { newlen = v; } };
+    var res = [].unshift.call(a);
+    assertEq(res, expected);
+    assertEq(newlen, expected);
+}
+
+testGetSet(0, 0);
+testGetSet(10, 10);
+testGetSet("1", 1);
+testGetSet(null, 0);
+testGetSet(MAX_LENGTH + 2, MAX_LENGTH);
+testGetSet(-5, 0);
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");