685bc04a01
R=yangguo@chromium.org, vsevik LOG=Y Committed: https://code.google.com/p/v8/source/detail?r=d5f5d38f73f43eba9658d91ffbe511af8c340d78 Review URL: https://codereview.chromium.org/710273002 Cr-Commit-Position: refs/heads/master@{#25380}
104 lines
3.5 KiB
JavaScript
104 lines
3.5 KiB
JavaScript
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --expose-debug-as debug
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// Test the mirror object for collection iterators.
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function testIteratorMirror(iter, offset, expected, opt_limit) {
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while (offset-- > 0) iter.next();
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var mirror = debug.MakeMirror(iter);
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assertTrue(mirror.isIterator());
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var preview = mirror.preview(opt_limit);
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assertArrayEquals(expected, preview);
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// Check that iterator has not changed after taking preview.
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var values = [];
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for (var i of iter) {
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if (opt_limit && values.length >= opt_limit) break;
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values.push(i);
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}
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assertArrayEquals(expected, values);
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}
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function testIteratorInternalProperties(iter, offset, kind, index, has_more) {
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while (offset-- > 0) iter.next();
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var mirror = debug.MakeMirror(iter);
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assertTrue(mirror.isIterator());
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var properties = mirror.internalProperties();
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assertEquals(3, properties.length);
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assertEquals("[[IteratorHasMore]]", properties[0].name());
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assertEquals(has_more, properties[0].value().value());
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assertEquals("[[IteratorIndex]]", properties[1].name());
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assertEquals(index, properties[1].value().value());
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assertEquals("[[IteratorKind]]", properties[2].name());
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assertEquals(kind, properties[2].value().value());
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}
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var o1 = { foo: 1 };
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var o2 = { foo: 2 };
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var map = new Map();
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map.set(41, 42);
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map.set(o1, o2);
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testIteratorMirror(map.keys(), 0, [41, o1]);
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testIteratorMirror(map.values(), 0, [42, o2]);
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testIteratorMirror(map.entries(), 0, [[41, 42], [o1, o2]]);
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testIteratorMirror(map.keys(), 1, [o1]);
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testIteratorMirror(map.values(), 1, [o2]);
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testIteratorMirror(map.entries(), 1, [[o1, o2]]);
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testIteratorMirror(map.keys(), 2, []);
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testIteratorMirror(map.values(), 2, []);
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testIteratorMirror(map.entries(), 2, []);
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// Test with maximum limit.
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testIteratorMirror(map.keys(), 0, [41], 1);
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testIteratorMirror(map.values(), 0, [42], 1);
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testIteratorMirror(map.entries(), 0, [[41, 42]], 1);
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testIteratorInternalProperties(map.keys(), 0, "keys", 0, true);
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testIteratorInternalProperties(map.values(), 1, "values", 1, true);
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testIteratorInternalProperties(map.entries(), 2, "entries", 2, false);
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testIteratorInternalProperties(map.keys(), 3, "keys", 2, false);
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var set = new Set();
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set.add(41);
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set.add(42);
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set.add(o1);
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set.add(o2);
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testIteratorMirror(set.keys(), 0, [41, 42, o1, o2]);
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testIteratorMirror(set.values(), 0, [41, 42, o1, o2]);
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testIteratorMirror(set.entries(), 0, [[41, 41], [42, 42], [o1, o1], [o2, o2]]);
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testIteratorMirror(set.keys(), 1, [42, o1, o2]);
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testIteratorMirror(set.values(), 1, [42, o1, o2]);
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testIteratorMirror(set.entries(), 1, [[42, 42], [o1, o1], [o2, o2]]);
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testIteratorMirror(set.keys(), 3, [o2]);
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testIteratorMirror(set.values(), 3, [o2]);
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testIteratorMirror(set.entries(), 3, [[o2, o2]]);
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testIteratorMirror(set.keys(), 5, []);
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testIteratorMirror(set.values(), 5, []);
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testIteratorMirror(set.entries(), 5, []);
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// Test with maximum limit.
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testIteratorMirror(set.keys(), 1, [42, o1], 2);
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testIteratorMirror(set.values(), 1, [42, o1], 2);
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testIteratorMirror(set.entries(), 1, [[42, 42], [o1, o1]], 2);
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testIteratorInternalProperties(set.keys(), 0, "values", 0, true);
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testIteratorInternalProperties(set.values(), 1, "values", 1, true);
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testIteratorInternalProperties(set.entries(), 2, "entries", 2, true);
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testIteratorInternalProperties(set.keys(), 3, "values", 3, true);
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testIteratorInternalProperties(set.values(), 4, "values", 4, false);
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testIteratorInternalProperties(set.entries(), 5, "entries", 4, false);
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