| // 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, opt_limit) { |
| while (offset-- > 0) iter.next(); |
| |
| var mirror = debug.MakeMirror(iter); |
| assertTrue(mirror.isIterator()); |
| |
| var preview = mirror.preview(opt_limit); |
| assertArrayEquals(expected, preview); |
| |
| // Check that iterator has not changed after taking preview. |
| var values = []; |
| for (var i of iter) { |
| if (opt_limit && values.length >= opt_limit) break; |
| values.push(i); |
| } |
| assertArrayEquals(expected, values); |
| } |
| |
| function testIteratorInternalProperties(iter, offset, kind, index, has_more) { |
| while (offset-- > 0) iter.next(); |
| |
| var mirror = debug.MakeMirror(iter); |
| assertTrue(mirror.isIterator()); |
| |
| var properties = mirror.internalProperties(); |
| assertEquals(3, properties.length); |
| assertEquals("[[IteratorHasMore]]", properties[0].name()); |
| assertEquals(has_more, properties[0].value().value()); |
| assertEquals("[[IteratorIndex]]", properties[1].name()); |
| assertEquals(index, properties[1].value().value()); |
| assertEquals("[[IteratorKind]]", properties[2].name()); |
| assertEquals(kind, properties[2].value().value()); |
| } |
| |
| 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, []); |
| |
| // Test with maximum limit. |
| testIteratorMirror(map.keys(), 0, [41], 1); |
| testIteratorMirror(map.values(), 0, [42], 1); |
| testIteratorMirror(map.entries(), 0, [[41, 42]], 1); |
| |
| testIteratorInternalProperties(map.keys(), 0, "keys", 0, true); |
| testIteratorInternalProperties(map.values(), 1, "values", 1, true); |
| testIteratorInternalProperties(map.entries(), 2, "entries", 2, false); |
| testIteratorInternalProperties(map.keys(), 3, "keys", 2, false); |
| |
| 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, []); |
| |
| // Test with maximum limit. |
| testIteratorMirror(set.keys(), 1, [42, o1], 2); |
| testIteratorMirror(set.values(), 1, [42, o1], 2); |
| testIteratorMirror(set.entries(), 1, [[42, 42], [o1, o1]], 2); |
| |
| testIteratorInternalProperties(set.keys(), 0, "values", 0, true); |
| testIteratorInternalProperties(set.values(), 1, "values", 1, true); |
| testIteratorInternalProperties(set.entries(), 2, "entries", 2, true); |
| testIteratorInternalProperties(set.keys(), 3, "values", 3, true); |
| testIteratorInternalProperties(set.values(), 4, "values", 4, false); |
| testIteratorInternalProperties(set.entries(), 5, "entries", 4, false); |