pkg/matcher: refactor with unittest v0.12 work

test/core_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.core_matchers_test;
 
 import 'package:matcher/matcher.dart';
 import 'package:unittest/unittest.dart' show test, group;
 
 import 'test_utils.dart';
 
 void main() {
-  initUtils();
-
   test('isTrue', () {
     shouldPass(true, isTrue);
     shouldFail(false, isTrue, "Expected: true Actual: <false>");
   });
 
   test('isFalse', () {
     shouldPass(false, isFalse);
     shouldFail(10, isFalse, "Expected: false Actual: <10>");
     shouldFail(true, isFalse, "Expected: false Actual: <true>");
   });
@@ skipping 85 matching lines @@
         r"from Function 'doesThrow': static\.)?>"
         r"   Which: threw 'X'"));
   });
 
   test('hasLength', () {
     var a = new Map();
     var b = new List();
     shouldPass(a, hasLength(0));
     shouldPass(b, hasLength(0));
     shouldPass('a', hasLength(1));
-    shouldFail(0, hasLength(0), new PrefixMatcher(
+    shouldFail(0, hasLength(0), new _PrefixMatcher(
         "Expected: an object with length of <0> "
         "Actual: <0> "
         "Which: has no length property"));
 
     b.add(0);
     shouldPass(b, hasLength(1));
     shouldFail(b, hasLength(2), "Expected: an object with length of <2> "
         "Actual: [0] "
         "Which: has length of <1>");
 
@@ skipping 52 matching lines @@
   });
 
   group('Predicate Matchers', () {
     test('isInstanceOf', () {
       shouldFail(0, predicate((x) => x is String, "an instance of String"),
           "Expected: an instance of String Actual: <0>");
       shouldPass('cow', predicate((x) => x is String, "an instance of String"));
     });
   });
 }
+
+class _PrefixMatcher extends Matcher {

[nweiz, 2015/02/17 23:17:42]

Add at least a short description of this.

[kevmoo, 2015/02/18 00:33:40]

Or remove it. Much easier. :-)

+  final String _prefix;
+  const _PrefixMatcher(this._prefix);
+  bool matches(item, Map matchState) {
+    return item is String &&
+        (collapseWhitespace(item)).startsWith(collapseWhitespace(_prefix));
+  }
+
+  Description describe(Description description) => description
+      .add('a string starting with ')
+      .addDescriptionOf(collapseWhitespace(_prefix))
+      .add(' ignoring whitespace');
+}