pkg/matcher: cleanup, updates, deprecations, fixes

pkg/matcher/test/deprecated_matchers_test.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library matcher.deprecated_matchers_test;
+
+import 'package:matcher/matcher.dart';
+import 'package:unittest/unittest.dart' show test, group;
+
+import 'test_utils.dart';
+
+void main() {
+  initUtils();
+
+  test('throwsAbstractClassInstantiationError', () {
+    expect(() => new _AbstractClass(), throwsAbstractClassInstantiationError);
+  });
+
+  test('throwsFallThroughError', () {
+    expect(() {
+      var a = 0;
+      switch (a) {
+        case 0:
+          a += 1;
+        case 1:
+          return;
+      }
+    }, throwsFallThroughError);
+  });
+}
+
+abstract class _AbstractClass {
+}