| // Copyright 2014 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Flags: --expose-debug-as debug |
| // Test the mirror object for collection iterators. |
| |
| function testIteratorMirror(iter, offset, expected) { |
| while (offset-- > 0) iter.next(); |
| |
| var mirror = debug.MakeMirror(iter); |
| assertTrue(mirror.isIterator()); |
| |
| var preview = mirror.preview(); |
| assertArrayEquals(expected, preview); |
| |
| // Check that iterator has not changed after taking preview. |
| var values = []; |
| for (var i of iter) values.push(i); |
| assertArrayEquals(expected, values); |
| } |
| |
| var o1 = { foo: 1 }; |
| var o2 = { foo: 2 }; |
| |
| var map = new Map(); |
| map.set(41, 42); |
| map.set(o1, o2); |
| |
| testIteratorMirror(map.keys(), 0, [41, o1]); |
| testIteratorMirror(map.values(), 0, [42, o2]); |
| testIteratorMirror(map.entries(), 0, [[41, 42], [o1, o2]]); |
| |
| testIteratorMirror(map.keys(), 1, [o1]); |
| testIteratorMirror(map.values(), 1, [o2]); |
| testIteratorMirror(map.entries(), 1, [[o1, o2]]); |
| |
| testIteratorMirror(map.keys(), 2, []); |
| testIteratorMirror(map.values(), 2, []); |
| testIteratorMirror(map.entries(), 2, []); |
| |
| var set = new Set(); |
| set.add(41); |
| set.add(42); |
| set.add(o1); |
| set.add(o2); |
| |
| testIteratorMirror(set.keys(), 0, [41, 42, o1, o2]); |
| testIteratorMirror(set.values(), 0, [41, 42, o1, o2]); |
| testIteratorMirror(set.entries(), 0, [[41, 41], [42, 42], [o1, o1], [o2, o2]]); |
| |
| testIteratorMirror(set.keys(), 1, [42, o1, o2]); |
| testIteratorMirror(set.values(), 1, [42, o1, o2]); |
| testIteratorMirror(set.entries(), 1, [[42, 42], [o1, o1], [o2, o2]]); |
| |
| testIteratorMirror(set.keys(), 3, [o2]); |
| testIteratorMirror(set.values(), 3, [o2]); |
| testIteratorMirror(set.entries(), 3, [[o2, o2]]); |
| |
| testIteratorMirror(set.keys(), 5, []); |
| testIteratorMirror(set.values(), 5, []); |
| testIteratorMirror(set.entries(), 5, []); |