New expectation functions plus convert old tests to use these.

lib/unittest/operator_matchers.dart

Index: lib/unittest/operator_matchers.dart
===================================================================
--- lib/unittest/operator_matchers.dart	(revision 0)
+++ lib/unittest/operator_matchers.dart	(revision 0)
@@ -0,0 +1,176 @@
+// 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.
+
+/**
+ * This returns a matcher that inverts [matcher] to its logical negation.
+ */
+IMatcher isNot(matcher) => new _IsNot(wrapMatcher(matcher));
+
+class _IsNot extends Matcher {
+  final IMatcher _matcher;
+
+  const _IsNot(IMatcher this._matcher);
+
+  bool matches(item) => !_matcher.matches(item);
+
+  IDescription describe(IDescription 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.
+*/
+IMatcher allOf(arg0,
+             [arg1 = null,
+              arg2 = null,
+              arg3 = null,
+              arg4 = null,
+              arg5 = null,
+              arg6 = null]) {
+  if (arg0 is List) {
+    expect(arg1, isNull);
+    expect(arg2, isNull);
+    expect(arg3, isNull);
+    expect(arg4, isNull);
+    expect(arg5, isNull);
+    expect(arg6, isNull);
+    for (int i = 0; i < arg0.length; i++) {
+      arg0[i] = wrapMatcher(arg0[i]);
+    }
+    return new _AllOf(arg0);
+  } else {
+    List matchers = new List();
+    if (arg0 != null) {
+      matchers.add(arg0);
+    }
+    if (arg1 != null) {
+      matchers.add(arg1);
+    }
+    if (arg2 != null) {
+      matchers.add(arg2);
+    }
+    if (arg3 != null) {
+      matchers.add(arg3);
+    }
+    if (arg4 != null) {
+      matchers.add(arg4);
+    }
+    if (arg5 != null) {
+      matchers.add(arg5);
+    }
+    if (arg6 != null) {
+      matchers.add(arg6);
+    }
+    return new _AllOf(matchers);
+  }
+}
+
+class _AllOf extends Matcher {
+  final Iterable<IMatcher> _matchers;
+
+  const _AllOf(this._matchers);
+
+  bool matches(item) {
+     for (var matcher in _matchers) {
+       if (!matcher.matches(item)) {
+         return false;
+       }
+     }
+     return true;
+  }
+
+  IDescription describeMismatch(item, IDescription mismatchDescription) {
+    for (var matcher in _matchers) {
+      if (!matcher.matches(item)) {
+        mismatchDescription.addDescriptionOf(matcher).add(' ');
+        matcher.describeMismatch(item, mismatchDescription);
+        break;
+      }
+    }
+    return mismatchDescription;
+  }
+
+  IDescription describe(IDescription description) =>
+      description.addList('(', ' 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.
+*/
+
+IMatcher anyOf(arg0,
+               [arg1 = null,
+                arg2 = null,
+                arg3 = null,
+                arg4 = null,
+                arg5 = null,
+                arg6 = null]) {
+  if (arg0 is List) {
+    expect(arg1, isNull);

[Bob Nystrom, 2012/06/01 18:22:23]

This does look pretty nice. I like the new API you have.

[gram, 2012/06/01 22:22:00]

Done.

+    expect(arg2, isNull);
+    expect(arg3, isNull);
+    expect(arg4, isNull);
+    expect(arg5, isNull);
+    expect(arg6, isNull);
+    for (int i = 0; i < arg0.length; i++) {
+      arg0[i] = wrapMatcher(arg0[i]);
+    }
+    return new _AnyOf(arg0);
+  } else {
+    List matchers = new List();
+    if (arg0 != null) {
+      matchers.add(arg0);
+    }
+    if (arg1 != null) {
+      matchers.add(arg1);
+    }
+    if (arg2 != null) {
+      matchers.add(arg2);
+    }
+    if (arg3 != null) {
+      matchers.add(arg3);
+    }
+    if (arg4 != null) {
+      matchers.add(arg4);
+    }
+    if (arg5 != null) {
+      matchers.add(arg5);
+    }
+    if (arg6 != null) {
+      matchers.add(arg6);
+    }
+    return new _AnyOf(matchers);
+  }
+}
+
+class _AnyOf extends Matcher {
+  final Iterable<IMatcher> _matchers;
+
+  const _AnyOf(this._matchers);
+
+  bool matches(item) {
+     for (var matcher in _matchers) {
+       if (matcher.matches(item)) {
+         return true;
+       }
+     }
+     return false;
+  }
+
+  IDescription describe(IDescription description) =>
+    description.addList('(', ' or ', ')', _matchers);
+}
+