sra@google.com
f261cf4f11
This fixes issue 1883. Review URL: https://chromiumcodereview.appspot.com//10868067 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@11331 260f80e4-7a28-3924-810f-c04153c831b5
70 lines
1.9 KiB
Dart
70 lines
1.9 KiB
Dart
#library('TestUtils');
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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, $reason";
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walk(path, expected, actual) {
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if (expected is String || expected is num || expected == null) {
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Expect.equals(expected, actual, message(path, 'not equal'));
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return;
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}
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// Cycle or DAG?
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for (int i = 0; i < eItems.length; i++) {
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if (expected === eItems[i]) {
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Expect.identical(aItems[i], actual,
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message(path, 'missing back or side edge'));
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return;
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}
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}
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for (int i = 0; i < aItems.length; i++) {
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if (actual === aItems[i]) {
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Expect.identical(eItems[i], expected,
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message(path, 'extra back or side edge'));
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return;
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}
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}
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eItems.add(expected);
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aItems.add(actual);
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if (expected is List) {
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Expect.isTrue(actual is List, message(path, '$actual is List'));
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Expect.equals(expected.length, actual.length,
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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.isTrue(actual is Map, message(path, '$actual is Map'));
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for (var key in expected.getKeys()) {
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if (!actual.containsKey(key)) {
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Expect.fail(message(path, 'missing key "$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.getKeys()) {
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if (!expected.containsKey(key)) {
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Expect.fail(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.fail('Unhandled type: $expected');
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}
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walk('', expected, actual);
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}
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