floitsch@google.com
8e6f238f86
Replace === null with == null. BUG=http://dartbug.com/6380 Review URL: https://codereview.chromium.org//11361190 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@14794 260f80e4-7a28-3924-810f-c04153c831b5
71 lines
2.0 KiB
Dart
71 lines
2.0 KiB
Dart
library TestUtils;
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import '../../pkg/unittest/lib/unittest.dart';
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/**
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* Verifies that [actual] has the same graph structure as [expected].
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* Detects cycles and DAG structure in Maps and Lists.
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*/
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verifyGraph(expected, actual) {
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var eItems = [];
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var aItems = [];
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message(path, reason) => path == ''
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? reason
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: reason == null ? "path: $path" : "path: $path, $reason";
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walk(path, expected, actual) {
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if (expected is String || expected is num || expected == null) {
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expect(actual, equals(expected), reason: message(path, 'not equal'));
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return;
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}
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// Cycle or DAG?
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for (int i = 0; i < eItems.length; i++) {
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if (identical(expected, eItems[i])) {
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expect(actual, same(aItems[i]),
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reason: message(path, 'missing back or side edge'));
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return;
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}
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}
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for (int i = 0; i < aItems.length; i++) {
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if (identical(actual, aItems[i])) {
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expect(expected, same(eItems[i]),
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reason: message(path, 'extra back or side edge'));
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return;
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}
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}
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eItems.add(expected);
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aItems.add(actual);
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if (expected is List) {
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expect(actual, isList, reason: message(path, '$actual is List'));
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expect(actual.length, expected.length,
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reason: message(path, 'different list lengths'));
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for (var i = 0; i < expected.length; i++) {
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walk('$path[$i]', expected[i], actual[i]);
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}
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return;
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}
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if (expected is Map) {
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expect(actual, isMap, reason: message(path, '$actual is Map'));
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for (var key in expected.keys) {
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if (!actual.containsKey(key)) {
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expect(false, isTrue, reason: message(path, 'missing key "$key"'));
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}
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walk('$path["$key"]', expected[key], actual[key]);
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}
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for (var key in actual.keys) {
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if (!expected.containsKey(key)) {
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expect(false, isTrue, reason: message(path, 'extra key "$key"'));
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}
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}
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return;
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}
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expect(false, isTrue, reason: 'Unhandled type: $expected');
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}
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walk('', expected, actual);
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}
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