1 files changed, 57 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Class/uninitializedThisError.js b/js/src/tests/ecma_6/Class/uninitializedThisError.js
new file mode 100644
index 000000000..cbc557285
--- /dev/null
+++ b/js/src/tests/ecma_6/Class/uninitializedThisError.js
@@ -0,0 +1,57 @@
+function checkErr(f, className) {
+    var expected;
+    if (className !== "")
+        expected = "|this| used uninitialized in " + className + " class constructor";
+    else
+        expected = "|this| used uninitialized in arrow function in class constructor";
+    try {
+        f();
+        assertEq(0, 1);
+    } catch (e) {
+        assertEq(e.name, "ReferenceError");
+        assertEq(e.message, expected);
+    }
+}
+class TestNormal extends class {} {
+    constructor() { this; }
+}
+checkErr(() => new TestNormal(), "TestNormal");
+
+class TestEval extends class {} {
+    constructor() { eval("this") }
+}
+checkErr(() => new TestEval(), "TestEval");
+
+class TestNestedEval extends class {} {
+    constructor() { eval("eval('this')") }
+}
+checkErr(() => new TestNestedEval(), "TestNestedEval");
+
+checkErr(() => {
+    new class extends class {} {
+        constructor() { eval("this") }
+    }
+}, "anonymous");
+
+class TestArrow extends class {} {
+    constructor() { (() => this)(); }
+}
+checkErr(() => new TestArrow(), "");
+
+class TestArrowEval extends class {} {
+    constructor() { (() => eval("this"))(); }
+}
+checkErr(() => new TestArrowEval(), "");
+
+class TestEvalArrow extends class {} {
+    constructor() { eval("(() => this)()"); }
+}
+checkErr(() => new TestEvalArrow(), "");
+
+class TestTypeOf extends class {} {
+    constructor() { eval("typeof this"); }
+}
+checkErr(() => new TestTypeOf(), "TestTypeOf");
+
+if (typeof reportCompare === 'function')
+    reportCompare(0, 0);