Strict mode Passingnon-Strict mode Passing
Features:
- ∅
// 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-map.prototype.keys description: > Returns an iterator. info: | Map.prototype.keys ( ) ... 2. Return CreateMapIterator(M, "key"). 23.1.5.1 CreateMapIterator Abstract Operation ... 7. Return iterator. ---*/ var obj = {}; var map = new Map(); map.set('foo', 1); map.set(obj, 2); map.set(map, 3); var iterator = map.keys(); var result; result = iterator.next(); assert.sameValue(result.value, 'foo', 'First result `value` ("key")'); assert.sameValue(result.done, false, 'First result `done` flag'); result = iterator.next(); assert.sameValue(result.value, obj, 'Second result `value` ("key")'); assert.sameValue(result.done, false, 'Second result `done` flag'); result = iterator.next(); assert.sameValue(result.value, map, 'Third result `value` ("key")'); assert.sameValue(result.done, false, 'Third result `done` flag'); result = iterator.next(); assert.sameValue(result.value, undefined, 'Exhausted result `value`'); assert.sameValue(result.done, true, 'Exhausted result `done` flag'); result = iterator.next(); assert.sameValue( result.value, undefined, 'Exhausted result `value` (repeated request)' ); assert.sameValue( result.done, true, 'Exhausted result `done` flag (repeated request)' );