Add all dart:html tests from the sdk to test/codegen.

test/codegen/lib/html/utils.dart

+library TestUtils;
+
+import 'dart:async';
+import 'dart:html';
+import 'dart:js' as js;
+import 'dart:typed_data';
+import 'package:unittest/unittest.dart';
+export 'package:web_components/polyfill.dart';
+
+/**
+ * Verifies that [actual] has the same graph structure as [expected].
+ * Detects cycles and DAG structure in Maps and Lists.
+ */
+verifyGraph(expected, actual) {
+  var eItems = [];
+  var aItems = [];
+
+  message(path, reason) => path == ''
+      ? reason
+      : reason == null ? "path: $path" : "path: $path, $reason";
+
+  walk(path, expected, actual) {
+    if (expected is String || expected is num || expected == null) {
+      expect(actual, equals(expected), reason: message(path, 'not equal'));
+      return;
+    }
+
+    // Cycle or DAG?
+    for (int i = 0; i < eItems.length; i++) {
+      if (identical(expected, eItems[i])) {
+        expect(actual, same(aItems[i]),
+            reason: message(path, 'missing back or side edge'));
+        return;
+      }
+    }
+    for (int i = 0; i < aItems.length; i++) {
+      if (identical(actual, aItems[i])) {
+        expect(expected, same(eItems[i]),
+            reason: message(path, 'extra back or side edge'));
+        return;
+      }
+    }
+    eItems.add(expected);
+    aItems.add(actual);
+
+    if (expected is Blob) {
+      expect(actual is Blob, isTrue,
+          reason: '$actual is Blob');
+      expect(expected.type, equals(actual.type),
+          reason: message(path, '.type'));
+      expect(expected.size, equals(actual.size),
+          reason: message(path, '.size'));
+      return;
+    }
+
+    if (expected is ByteBuffer) {
+      expect(actual is ByteBuffer, isTrue,
+          reason: '$actual is ByteBuffer');
+      expect(expected.lengthInBytes, equals(actual.lengthInBytes),
+          reason: message(path, '.lengthInBytes'));
+      // TODO(antonm): one can create a view on top of those
+      // and check if contents identical.  Let's do it later.
+      return;
+    }
+
+    if (expected is DateTime) {
+      expect(actual is DateTime, isTrue,
+          reason: '$actual is DateTime');
+      expect(expected.millisecondsSinceEpoch,
+          equals(actual.millisecondsSinceEpoch),
+          reason: message(path, '.millisecondsSinceEpoch'));
+      return;
+    }
+
+    if (expected is ImageData) {
+      expect(actual is ImageData, isTrue,
+          reason: '$actual is ImageData');
+      expect(expected.width, equals(actual.width),
+          reason: message(path, '.width'));
+      expect(expected.height, equals(actual.height),
+          reason: message(path, '.height'));
+      walk('$path.data', expected.data, actual.data);
+      return;
+    }
+
+    if (expected is TypedData) {
+      expect(actual is TypedData, isTrue,
+          reason: '$actual is TypedData');
+      walk('$path/.buffer', expected.buffer, actual.buffer);
+      expect(expected.offsetInBytes, equals(actual.offsetInBytes),
+          reason: message(path, '.offsetInBytes'));
+      expect(expected.lengthInBytes, equals(actual.lengthInBytes),
+          reason: message(path, '.lengthInBytes'));
+      // And also fallback to elements check below.
+    }
+
+    if (expected is List) {
+      expect(actual, isList, reason: message(path, '$actual is List'));
+      expect(actual.length, expected.length,
+          reason: message(path, 'different list lengths'));
+      for (var i = 0; i < expected.length; i++) {
+        walk('$path[$i]', expected[i], actual[i]);
+      }
+      return;
+    }
+
+    if (expected is Map) {
+      expect(actual, isMap, reason: message(path, '$actual is Map'));
+      for (var key in expected.keys) {
+        if (!actual.containsKey(key)) {
+          expect(false, isTrue, reason: message(path, 'missing key "$key"'));
+        }
+        walk('$path["$key"]',  expected[key], actual[key]);
+      }
+      for (var key in actual.keys) {
+        if (!expected.containsKey(key)) {
+          expect(false, isTrue, reason: message(path, 'extra key "$key"'));
+        }
+      }
+      return;
+    }
+
+    expect(false, isTrue, reason: 'Unhandled type: $expected');
+  }
+
+  walk('', expected, actual);
+}
+
+
+/**
+ * Sanitizer which does nothing.
+ */
+class NullTreeSanitizer implements NodeTreeSanitizer {
+  void sanitizeTree(Node node) {}
+}
+
+
+/**
+ * Validate that two DOM trees are equivalent.
+ */
+void validateNodeTree(Node a, Node b, [String path = '']) {
+  path = '${path}${a.runtimeType}';
+  expect(a.nodeType, b.nodeType, reason: '$path nodeTypes differ');
+  expect(a.nodeValue, b.nodeValue, reason: '$path nodeValues differ');
+  expect(a.text, b.text, reason: '$path texts differ');
+  expect(a.nodes.length, b.nodes.length, reason: '$path nodes.lengths differ');
+
+  if (a is Element) {
+    Element bE = b;
+    Element aE = a;
+
+    expect(aE.tagName, bE.tagName, reason: '$path tagNames differ');
+    expect(aE.attributes.length, bE.attributes.length,
+        reason: '$path attributes.lengths differ');
+    for (var key in aE.attributes.keys) {
+      expect(aE.attributes[key], bE.attributes[key],
+          reason: '$path attribute [$key] values differ');
+    }
+  }
+  for (var i = 0; i < a.nodes.length; ++i) {
+    validateNodeTree(a.nodes[i], b.nodes[i], '$path[$i].');
+  }
+}
+
+/**
+ * Upgrade all custom elements in the subtree which have not been upgraded.
+ *
+ * This is needed to cover timing scenarios which the custom element polyfill
+ * does not cover.
+ */
+void upgradeCustomElements(Node node) {
+  if (js.context.hasProperty('CustomElements') &&
+      js.context['CustomElements'].hasProperty('upgradeAll')) {
+    js.context['CustomElements'].callMethod('upgradeAll', [node]);
+  }
+}