New expectation functions plus convert old tests to use these.

lib/unittest/unittest.dart

Index: lib/unittest/unittest.dart
===================================================================
--- lib/unittest/unittest.dart	(revision 8082)
+++ lib/unittest/unittest.dart	(working copy)
@@ -12,9 +12,7 @@
  *
  *  * Tests: Tests are specified via the top-level function [test], they can be
  *    organized together using [group].
- *  * Checks: Test expectations can be specified via [expect] (see methods in
- *    [Expectation]), [expectThrow], or using assertions with the [Expect]
- *    class.
+ *  * Checks: Test expectations can be specified via [expect]
  *  * Configuration: The framework can be adapted by calling [configure] with a
  *    [Configuration].  Common configurations can be found in this package
  *    under: 'dom\_config.dart', 'html\_config.dart', and 'vm\_config.dart'.
@@ -125,8 +123,17 @@
 
 #import('dart:isolate');
 
+#source('collection_matchers.dart');
 #source('config.dart');
-#source('expectation.dart');
+#source('core_matchers.dart');
+#source('description.dart');
+#source('expect.dart');
+#source('interfaces.dart');
+#source('map_matchers.dart');
+#source('matcher.dart');
+#source('numeric_matchers.dart');
+#source('operator_matchers.dart');
+#source('string_matchers.dart');
 #source('test_case.dart');
 
 /** [Configuration] used by the unittest library. */
@@ -179,9 +186,6 @@
 /** If set, then all other test cases will be ignored. */
 TestCase _soloTest;
 
-/** Creates an expectation for the given value. */
-Expectation expect(value) => new Expectation(value);
-
 /**
  * Evaluates the [function] and validates that it throws an exception. If
  * [callback] is provided, then it will be invoked with the thrown exception.