pkg/(unit)test: include a copy of old matcher

lib/src/matcher/operator_matchers.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 unittest.matcher.operator_matchers;
+
+import 'interfaces.dart';
+import 'util.dart';
+
+/// This returns a matcher that inverts [matcher] to its logical negation.
+Matcher isNot(matcher) => new _IsNot(wrapMatcher(matcher));
+
+class _IsNot extends Matcher {
+  final Matcher _matcher;
+
+  const _IsNot(this._matcher);
+
+  bool matches(item, Map matchState) => !_matcher.matches(item, matchState);
+
+  Description describe(Description description) =>
+      description.add('not ').addDescriptionOf(_matcher);
+}
+
+/// This returns a matcher that matches if all of the matchers passed as
+/// arguments (up to 7) match.
+///
+/// Instead of passing the matchers separately they can be passed as a single
+/// List argument. Any argument that is not a matcher is implicitly wrapped in a
+/// Matcher to check for equality.
+Matcher allOf(arg0, [arg1, arg2, arg3, arg4, arg5, arg6]) {
+  return new _AllOf(_wrapArgs(arg0, arg1, arg2, arg3, arg4, arg5, arg6));
+}
+
+class _AllOf extends Matcher {
+  final List<Matcher> _matchers;
+
+  const _AllOf(this._matchers);
+
+  bool matches(item, Map matchState) {
+    for (var matcher in _matchers) {
+      if (!matcher.matches(item, matchState)) {
+        addStateInfo(matchState, {'matcher': matcher});
+        return false;
+      }
+    }
+    return true;
+  }
+
+  Description describeMismatch(
+      item, Description mismatchDescription, Map matchState, bool verbose) {
+    var matcher = matchState['matcher'];
+    matcher.describeMismatch(
+        item, mismatchDescription, matchState['state'], verbose);
+    return mismatchDescription;
+  }
+
+  Description describe(Description description) =>
+      description.addAll('(', ' and ', ')', _matchers);
+}
+
+/// Matches if any of the given matchers evaluate to true.
+///
+/// The arguments can be a set of matchers as separate parameters
+/// (up to 7), or a List of matchers.
+///
+/// The matchers are evaluated from left to right using short-circuit
+/// evaluation, so evaluation stops as soon as a matcher returns true.
+///
+/// Any argument that is not a matcher is implicitly wrapped in a
+/// Matcher to check for equality.
+Matcher anyOf(arg0, [arg1, arg2, arg3, arg4, arg5, arg6]) {
+  return new _AnyOf(_wrapArgs(arg0, arg1, arg2, arg3, arg4, arg5, arg6));
+}
+
+class _AnyOf extends Matcher {
+  final List<Matcher> _matchers;
+
+  const _AnyOf(this._matchers);
+
+  bool matches(item, Map matchState) {
+    for (var matcher in _matchers) {
+      if (matcher.matches(item, matchState)) {
+        return true;
+      }
+    }
+    return false;
+  }
+
+  Description describe(Description description) =>
+      description.addAll('(', ' or ', ')', _matchers);
+}
+
+List<Matcher> _wrapArgs(arg0, arg1, arg2, arg3, arg4, arg5, arg6) {
+  Iterable<Matcher> matchers;
+  if (arg0 is List) {
+    if (arg1 != null ||
+        arg2 != null ||
+        arg3 != null ||
+        arg4 != null ||
+        arg5 != null ||
+        arg6 != null) {
+      throw new ArgumentError('If arg0 is a List, all other arguments must be'
+          ' null.');
+    }
+
+    matchers = arg0;
+  } else {
+    matchers =
+        [arg0, arg1, arg2, arg3, arg4, arg5, arg6].where((e) => e != null);
+  }
+
+  return matchers.map((e) => wrapMatcher(e)).toList();
+}