Enable more web tests; use blacklist to filter them out (#41922)

Add more web tests;use blacklist instead of whitelist

dev/bots/test.dart

@@ -435,18 +435,28 @@ Future<void> _runTests() async {
 }
 
 Future<void> _runWebTests() async {
-  await _runFlutterWebTest(path.join(flutterRoot, 'packages', 'flutter'), tests: <String>[
-    'test/foundation/',
-    'test/physics/',
-    'test/services/',
-    // TODO(yjbanov): re-enable when flakiness is resolved
-    // 'test/rendering/',
-    // 'test/painting/',
-    // 'test/scheduler/',
-    // 'test/semantics/',
-    // 'test/widgets/',
-    // 'test/material/',
-  ]);
+  final Directory flutterPackageDir = Directory(path.join(flutterRoot, 'packages', 'flutter'));
+  final Directory testDir = Directory(path.join(flutterPackageDir.path, 'test'));
+
+  // TODO(yjbanov): we're getting rid of this blacklist as part of https://github.com/flutter/flutter/projects/60
+  const List<String> kBlacklist = <String>[
+    'test/cupertino',
+    'test/examples',
+    'test/material',
+    'test/painting',
+    'test/rendering',
+    'test/semantics',
+    'test/widgets',
+  ];
+
+  final List<String> directories = testDir
+    .listSync()
+    .whereType<Directory>()
+    .map<String>((Directory dir) => path.relative(dir.path, from: flutterPackageDir.path))
+    .where((String relativePath) => !kBlacklist.contains(relativePath))
+    .toList();
+
+  await _runFlutterWebTest(flutterPackageDir.path, tests: directories);
   await _runFlutterWebTest(path.join(flutterRoot, 'packages', 'flutter_web_plugins'), tests: <String>['test']);
 }
 

packages/flutter/test/gestures/transformed_monodrag_test.dart

@@ -334,7 +334,7 @@ void main() {
       expect(startDetails, hasLength(1));
       expect(updateDetails.single.globalPosition, within(distance: 0.0001, from: const Offset(400 + kTouchSlop + 3, 300 + kTouchSlop + 4)));
       expect(updateDetails.single.delta, within(distance: 0.1, from: const Offset(5, 0.0))); // sqrt(3^2 + 4^2)
-      expect(updateDetails.single.primaryDelta, within(distance: 0.1, from: 5.0)); // sqrt(3^2 + 4^2)
+      expect(updateDetails.single.primaryDelta, within<double>(distance: 0.1, from: 5.0)); // sqrt(3^2 + 4^2)
     });
   });
 
@@ -662,7 +662,7 @@ void main() {
       expect(startDetails, hasLength(1));
       expect(updateDetails.single.globalPosition, within(distance: 0.0001, from: const Offset(400 + kTouchSlop - 4, 300 + kTouchSlop + 3)));
       expect(updateDetails.single.delta, within(distance: 0.1, from: const Offset(0.0, 5.0))); // sqrt(3^2 + 4^2)
-      expect(updateDetails.single.primaryDelta, within(distance: 0.1, from: 5.0)); // sqrt(3^2 + 4^2)
+      expect(updateDetails.single.primaryDelta, within<double>(distance: 0.1, from: 5.0)); // sqrt(3^2 + 4^2)
     });
   });
 }

packages/flutter_test/lib/src/matchers.dart

@@ -1026,8 +1026,8 @@ double _sizeDistance(Size a, Size b) {
 /// The distance is computed by a [DistanceFunction].
 ///
 /// If `distanceFunction` is null, a standard distance function is used for the
-/// `runtimeType` of the `from` argument. Standard functions are defined for
-/// the following types:
+/// `T` generic argument. Standard functions are defined for the following
+/// types:
 ///
 ///  * [Color], whose distance is the maximum component-wise delta.
 ///  * [Offset], whose distance is the Euclidean distance computed using the
@@ -1050,7 +1050,7 @@ Matcher within<T>({
   @required T from,
   DistanceFunction<T> distanceFunction,
 }) {
-  distanceFunction ??= _kStandardDistanceFunctions[from.runtimeType];
+  distanceFunction ??= _kStandardDistanceFunctions[T];
 
   if (distanceFunction == null) {
     throw ArgumentError(

packages/flutter_tools/lib/src/web/chrome.dart

@@ -154,10 +154,6 @@ class ChromeLauncher {
     return chrome;
   }
 
-  /// Connects to an instance of Chrome with an open debug port.
-  static Future<Chrome> fromExisting(int port) async =>
-      _connect(Chrome._(port, ChromeConnection('localhost', port)), false);
-
   static Future<Chrome> get connectedInstance => _currentCompleter.future;
 
   /// Returns the full URL of the Chrome remote debugger for the main page.