| Index: third_party/WebKit/LayoutTests/bindings/pair-iterators.html
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| diff --git a/third_party/WebKit/LayoutTests/bindings/pair-iterators.html b/third_party/WebKit/LayoutTests/bindings/pair-iterators.html
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| new file mode 100644
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| index 0000000000000000000000000000000000000000..0cb7632b189442ec016760f1b8d58c24d28140b9
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| --- /dev/null
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| +++ b/third_party/WebKit/LayoutTests/bindings/pair-iterators.html
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| @@ -0,0 +1,34 @@
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| +<!DOCTYPE html>
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| +<script src="../resources/testharness.js"></script>
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| +<script src="../resources/testharnessreport.js"></script>
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| +<script>
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| + test(() => {
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| +   // Headers.idl has an iterable<k, v> declaration.
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| +   let iterator = new Headers().entries();
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| +   let iteratorProto = Object.getPrototypeOf(iterator);
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| +   let iteratorProtoProto = Object.getPrototypeOf(iteratorProto);
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| +
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| +   assert_array_equals(Object.getOwnPropertyNames(iterator), [],
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| +                       "The default iterator object has no properties of its own.");
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| +   assert_array_equals(Object.getOwnPropertySymbols(iterator), [],
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| +                       "The default iterator object has no symbols of its own.");
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| +
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| +   assert_in_array("next", Object.getOwnPropertyNames(iteratorProto),
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| +                   "The iterator prototype object has a property called 'next'.");
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| +   let nextProperty = Object.getOwnPropertyDescriptor(iteratorProto, "next");
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| +   assert_true(nextProperty.configurable, "The 'next' property must be configurable.");
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| +   assert_true(nextProperty.enumerable, "The 'next' property must be enumerable.");
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| +   assert_true(nextProperty.writable, "The 'next' property must be writable.");
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| +
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| +   assert_equals(iteratorProtoProto,
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| +                 Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]())),
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| +                 "The iterator prototype object's [[Prototype]] is %IteratorPrototype.");
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| +   assert_array_equals(Object.getOwnPropertyNames(iteratorProtoProto), [],
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| +                       "%IteratorPrototype% has no properties of its own");
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| +   assert_array_equals(Object.getOwnPropertySymbols(iteratorProtoProto),
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| +                       [Symbol.iterator],
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| +                       "%IteratorPrototype% has defines @@iterator.");
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| +   assert_equals(Object.getPrototypeOf(iteratorProtoProto), Object.prototype,
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| +                 "%IteratorPrototype% descends from %ObjectPrototype%.");
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| + }, "Iterators from pair-iterable interfaces inherit from %IteratorPrototype%");
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| +</script>
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| 
 |