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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/test262/annexB/language/statements/for-of/iterator-close-return-emulates-undefined-throws-when-called.js | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/test262/annexB/language/statements/for-of/iterator-close-return-emulates-undefined-throws-when-called.js b/js/src/tests/test262/annexB/language/statements/for-of/iterator-close-return-emulates-undefined-throws-when-called.js new file mode 100644 index 0000000000..6a81a3ec29 --- /dev/null +++ b/js/src/tests/test262/annexB/language/statements/for-of/iterator-close-return-emulates-undefined-throws-when-called.js @@ -0,0 +1,27 @@ +// Copyright (C) 2017 Mozilla Corporation. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-iteratorclose +description: > + If <iterator>.return is an object emulating `undefined` (e.g. `document.all` + in browsers), it shouldn't be treated as if it were actually `undefined`. +features: [generators, IsHTMLDDA] +---*/ + +var IsHTMLDDA = $262.IsHTMLDDA; +var iter = { + [Symbol.iterator]() { return this; }, + next() { return {}; }, + return: IsHTMLDDA, +}; + +assert.throws(TypeError, function() { + // `IsHTMLDDA` is called here with `iter` as `this` and no arguments, and it's + // specified to return `null` under these conditions. Then the iteration + // protocol throws a `TypeError` because `null` isn't an object. + for (var x of iter) + break; +}); + +reportCompare(0, 0); |