1 // Copyright 2014 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Flags: --expose-debug-as debug 6 // Test the mirror object for collection iterators. 7 8 function testIteratorMirror(iter, offset, expected, opt_limit) { 9 while (offset-- > 0) iter.next(); 10 11 var mirror = debug.MakeMirror(iter); 12 assertTrue(mirror.isIterator()); 13 14 var preview = mirror.preview(opt_limit); 15 assertArrayEquals(expected, preview); 16 17 // Check that iterator has not changed after taking preview. 18 var values = []; 19 for (var i of iter) { 20 if (opt_limit && values.length >= opt_limit) break; 21 values.push(i); 22 } 23 assertArrayEquals(expected, values); 24 } 25 26 function testIteratorInternalProperties(iter, offset, kind, index, has_more) { 27 while (offset-- > 0) iter.next(); 28 29 var mirror = debug.MakeMirror(iter); 30 assertTrue(mirror.isIterator()); 31 32 var properties = mirror.internalProperties(); 33 assertEquals(3, properties.length); 34 assertEquals("[[IteratorHasMore]]", properties[0].name()); 35 assertEquals(has_more, properties[0].value().value()); 36 assertEquals("[[IteratorIndex]]", properties[1].name()); 37 assertEquals(index, properties[1].value().value()); 38 assertEquals("[[IteratorKind]]", properties[2].name()); 39 assertEquals(kind, properties[2].value().value()); 40 } 41 42 var o1 = { foo: 1 }; 43 var o2 = { foo: 2 }; 44 45 var map = new Map(); 46 map.set(41, 42); 47 map.set(o1, o2); 48 49 testIteratorMirror(map.keys(), 0, [41, o1]); 50 testIteratorMirror(map.values(), 0, [42, o2]); 51 testIteratorMirror(map.entries(), 0, [[41, 42], [o1, o2]]); 52 53 testIteratorMirror(map.keys(), 1, [o1]); 54 testIteratorMirror(map.values(), 1, [o2]); 55 testIteratorMirror(map.entries(), 1, [[o1, o2]]); 56 57 testIteratorMirror(map.keys(), 2, []); 58 testIteratorMirror(map.values(), 2, []); 59 testIteratorMirror(map.entries(), 2, []); 60 61 // Test with maximum limit. 62 testIteratorMirror(map.keys(), 0, [41], 1); 63 testIteratorMirror(map.values(), 0, [42], 1); 64 testIteratorMirror(map.entries(), 0, [[41, 42]], 1); 65 66 testIteratorInternalProperties(map.keys(), 0, "keys", 0, true); 67 testIteratorInternalProperties(map.values(), 1, "values", 1, true); 68 testIteratorInternalProperties(map.entries(), 2, "entries", 2, false); 69 testIteratorInternalProperties(map.keys(), 3, "keys", 2, false); 70 71 var set = new Set(); 72 set.add(41); 73 set.add(42); 74 set.add(o1); 75 set.add(o2); 76 77 testIteratorMirror(set.keys(), 0, [41, 42, o1, o2]); 78 testIteratorMirror(set.values(), 0, [41, 42, o1, o2]); 79 testIteratorMirror(set.entries(), 0, [[41, 41], [42, 42], [o1, o1], [o2, o2]]); 80 81 testIteratorMirror(set.keys(), 1, [42, o1, o2]); 82 testIteratorMirror(set.values(), 1, [42, o1, o2]); 83 testIteratorMirror(set.entries(), 1, [[42, 42], [o1, o1], [o2, o2]]); 84 85 testIteratorMirror(set.keys(), 3, [o2]); 86 testIteratorMirror(set.values(), 3, [o2]); 87 testIteratorMirror(set.entries(), 3, [[o2, o2]]); 88 89 testIteratorMirror(set.keys(), 5, []); 90 testIteratorMirror(set.values(), 5, []); 91 testIteratorMirror(set.entries(), 5, []); 92 93 // Test with maximum limit. 94 testIteratorMirror(set.keys(), 1, [42, o1], 2); 95 testIteratorMirror(set.values(), 1, [42, o1], 2); 96 testIteratorMirror(set.entries(), 1, [[42, 42], [o1, o1]], 2); 97 98 testIteratorInternalProperties(set.keys(), 0, "values", 0, true); 99 testIteratorInternalProperties(set.values(), 1, "values", 1, true); 100 testIteratorInternalProperties(set.entries(), 2, "entries", 2, true); 101 testIteratorInternalProperties(set.keys(), 3, "values", 3, true); 102 testIteratorInternalProperties(set.values(), 4, "values", 4, false); 103 testIteratorInternalProperties(set.entries(), 5, "entries", 4, false); 104
