mirror of
https://github.com/dart-lang/sdk
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500f5cb324
Retry https://github.com/dart-lang/sdk/commit/7a9cc03c09 Which was reverted at https://github.com/dart-lang/sdk/commit/b6d15d87bc R=devoncarew@google.com Review-Url: https://codereview.chromium.org/2978233002 .
220 lines
7.3 KiB
Dart
220 lines
7.3 KiB
Dart
library TestUtils;
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import 'dart:async';
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import 'dart:html';
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import 'dart:js' as js;
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import 'dart:typed_data';
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import 'package:unittest/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, $reason";
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walk(path, expected, actual) {
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if (expected is String || expected is num || expected == null) {
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expect(actual, equals(expected), reason: message(path, 'not equal'));
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return;
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}
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// Cycle or DAG?
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for (int i = 0; i < eItems.length; i++) {
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if (identical(expected, eItems[i])) {
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expect(actual, same(aItems[i]),
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reason: message(path, 'missing back or side edge'));
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return;
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}
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}
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for (int i = 0; i < aItems.length; i++) {
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if (identical(actual, aItems[i])) {
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expect(expected, same(eItems[i]),
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reason: message(path, 'extra back or side edge'));
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return;
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}
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}
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eItems.add(expected);
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aItems.add(actual);
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if (expected is Blob) {
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expect(actual is Blob, isTrue, reason: '$actual is Blob');
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expect(expected.type, equals(actual.type),
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reason: message(path, '.type'));
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expect(expected.size, equals(actual.size),
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reason: message(path, '.size'));
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return;
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}
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if (expected is ByteBuffer) {
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expect(actual is ByteBuffer, isTrue, reason: '$actual is ByteBuffer');
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expect(expected.lengthInBytes, equals(actual.lengthInBytes),
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reason: message(path, '.lengthInBytes'));
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// TODO(antonm): one can create a view on top of those
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// and check if contents identical. Let's do it later.
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return;
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}
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if (expected is DateTime) {
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expect(actual is DateTime, isTrue, reason: '$actual is DateTime');
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expect(expected.millisecondsSinceEpoch,
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equals(actual.millisecondsSinceEpoch),
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reason: message(path, '.millisecondsSinceEpoch'));
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return;
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}
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if (expected is ImageData) {
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expect(actual is ImageData, isTrue, reason: '$actual is ImageData');
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expect(expected.width, equals(actual.width),
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reason: message(path, '.width'));
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expect(expected.height, equals(actual.height),
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reason: message(path, '.height'));
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walk('$path.data', expected.data, actual.data);
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return;
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}
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if (expected is TypedData) {
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expect(actual is TypedData, isTrue, reason: '$actual is TypedData');
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walk('$path/.buffer', expected.buffer, actual.buffer);
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expect(expected.offsetInBytes, equals(actual.offsetInBytes),
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reason: message(path, '.offsetInBytes'));
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expect(expected.lengthInBytes, equals(actual.lengthInBytes),
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reason: message(path, '.lengthInBytes'));
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// And also fallback to elements check below.
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}
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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: $expected');
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}
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walk('', expected, actual);
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}
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/**
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* Sanitizer which does nothing.
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*/
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class NullTreeSanitizer implements NodeTreeSanitizer {
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void sanitizeTree(Node node) {}
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}
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/**
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* Validate that two DOM trees are equivalent.
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*/
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void validateNodeTree(Node a, Node b, [String path = '']) {
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path = '${path}${a.runtimeType}';
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expect(a.nodeType, b.nodeType, reason: '$path nodeTypes differ');
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expect(a.nodeValue, b.nodeValue, reason: '$path nodeValues differ');
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expect(a.text, b.text, reason: '$path texts differ');
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expect(a.nodes.length, b.nodes.length, reason: '$path nodes.lengths differ');
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if (a is Element) {
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Element bE = b;
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Element aE = a;
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expect(aE.tagName, bE.tagName, reason: '$path tagNames differ');
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expect(aE.attributes.length, bE.attributes.length,
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reason: '$path attributes.lengths differ');
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for (var key in aE.attributes.keys) {
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expect(aE.attributes[key], bE.attributes[key],
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reason: '$path attribute [$key] values differ');
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}
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}
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for (var i = 0; i < a.nodes.length; ++i) {
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validateNodeTree(a.nodes[i], b.nodes[i], '$path[$i].');
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}
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}
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/**
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* Upgrade all custom elements in the subtree which have not been upgraded.
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*
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* This is needed to cover timing scenarios which the custom element polyfill
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* does not cover.
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*/
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void upgradeCustomElements(Node node) {
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if (js.context.hasProperty('CustomElements') &&
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js.context['CustomElements'].hasProperty('upgradeAll')) {
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js.context['CustomElements'].callMethod('upgradeAll', [node]);
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}
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}
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/**
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* A future that completes once all custom elements in the initial HTML page
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* have been upgraded.
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*
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* This is needed because the native implementation can update the elements
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* while parsing the HTML document, but the custom element polyfill cannot,
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* so it completes this future once all elements are upgraded.
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*/
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// TODO(jmesserly): rename to webComponentsReady to match the event?
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Future customElementsReady = () {
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if (_isReady) return new Future.value();
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// Not upgraded. Wait for the polyfill to fire the WebComponentsReady event.
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// Note: we listen on document (not on document.body) to allow this polyfill
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// to be loaded in the HEAD element.
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return document.on['WebComponentsReady'].first;
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}();
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// Return true if we are using the polyfill and upgrade is complete, or if we
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// have native document.register and therefore the browser took care of it.
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// Otherwise return false, including the case where we can't find the polyfill.
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bool get _isReady {
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// If we don't have dart:js, assume things are ready
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if (js.context == null) return true;
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var customElements = js.context['CustomElements'];
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if (customElements == null) {
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// Return true if native document.register, otherwise false.
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// (Maybe the polyfill isn't loaded yet. Wait for it.)
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return document.supportsRegisterElement;
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}
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return customElements['ready'] == true;
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}
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/**
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* *Note* this API is primarily intended for tests. In other code it is better
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* to write it in a style that works with or without the polyfill, rather than
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* using this method.
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*
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* Synchronously trigger evaluation of pending lifecycle events, which otherwise
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* need to wait for a [MutationObserver] to signal the changes in the polyfill.
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* This method can be used to resolve differences in timing between native and
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* polyfilled custom elements.
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*/
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void customElementsTakeRecords([Node node]) {
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var customElements = js.context['CustomElements'];
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if (customElements == null) return;
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customElements.callMethod('takeRecords', [node]);
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}
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