1 files changed, 54 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/GeneratorPrototype/return/from-state-executing.js b/js/src/tests/test262/built-ins/GeneratorPrototype/return/from-state-executing.js
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index 0000000000..62827d5ad6
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+++ b/js/src/tests/test262/built-ins/GeneratorPrototype/return/from-state-executing.js
@@ -0,0 +1,54 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-generatorvalidate
+description: >
+  A TypeError should be thrown if the generator is in the "executing" state,
+  and the generator should be marked as "completed"
+info: |
+  25.3.3.1 GeneratorStart
+
+  [...]
+  4. Set the code evaluation state of genContext such that when evaluation is
+     resumed for that execution context the following steps will be performed:
+     a. Let result be the result of evaluating generatorBody.
+     b. Assert: If we return here, the generator either threw an exception or
+        performed either an implicit or explicit return.
+     c. Remove genContext from the execution context stack and restore the
+        execution context that is at the top of the execution context stack as
+        the running execution context.
+     d. Set generator.[[GeneratorState]] to "completed".
+     [...]
+
+  25.3.3.4 GeneratorResumeAbrupt
+
+  1. Let state be ? GeneratorValidate(generator).
+
+  25.3.3.2 GeneratorValidate
+
+  1. If Type(generator) is not Object, throw a TypeError exception.
+  2. If generator does not have a [[GeneratorState]] internal slot, throw a
+     TypeError exception.
+  3. Assert: generator also has a [[GeneratorContext]] internal slot.
+  4. Let state be generator.[[GeneratorState]].
+  5. If state is "executing", throw a TypeError exception.
+features: [generators]
+---*/
+
+var iter, result;
+function* g() {
+  iter.return(42);
+}
+
+iter = g();
+assert.throws(TypeError, function() {
+  iter.next();
+});
+
+result = iter.next();
+
+assert.sameValue(typeof result, 'object');
+assert.sameValue(result.value, undefined);
+assert.sameValue(result.done, true);
+
+reportCompare(0, 0);