| <!DOCTYPE html> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <script> |
| test(() => { |
| // Headers.idl has an iterable<k, v> declaration. |
| let iterator = new Headers().entries(); |
| let iteratorProto = Object.getPrototypeOf(iterator); |
| let iteratorProtoProto = Object.getPrototypeOf(iteratorProto); |
| |
| assert_array_equals(Object.getOwnPropertyNames(iterator), [], |
| "The default iterator object has no properties of its own."); |
| assert_array_equals(Object.getOwnPropertySymbols(iterator), [], |
| "The default iterator object has no symbols of its own."); |
| |
| assert_in_array("next", Object.getOwnPropertyNames(iteratorProto), |
| "The iterator prototype object has a property called 'next'."); |
| let nextProperty = Object.getOwnPropertyDescriptor(iteratorProto, "next"); |
| assert_true(nextProperty.configurable, "The 'next' property must be configurable."); |
| assert_true(nextProperty.enumerable, "The 'next' property must be enumerable."); |
| assert_true(nextProperty.writable, "The 'next' property must be writable."); |
| |
| assert_equals(iteratorProtoProto, |
| Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]())), |
| "The iterator prototype object's [[Prototype]] is %IteratorPrototype."); |
| assert_array_equals(Object.getOwnPropertyNames(iteratorProtoProto), [], |
| "%IteratorPrototype% has no properties of its own"); |
| assert_array_equals(Object.getOwnPropertySymbols(iteratorProtoProto), |
| [Symbol.iterator], |
| "%IteratorPrototype% has defines @@iterator."); |
| assert_equals(Object.getPrototypeOf(iteratorProtoProto), Object.prototype, |
| "%IteratorPrototype% descends from %ObjectPrototype%."); |
| }, "Iterators from pair-iterable interfaces inherit from %IteratorPrototype%"); |
| </script> |
