Unit test filtering.

lib/unittest/unittest.dart

 // Copyright (c) 2011, 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.
 
 /**
  * A library for writing dart unit tests.
  *
  * To import this library, specify the relative path to
  * lib/unittest/unittest.dart.
  *
@@ skipping 224 matching lines @@
       if (result == false) {
         _fail('Exception:\n$e\ndid not match expectation.');
       }
     }
   }
 
   if (threw != true) _fail('An expected exception was not thrown.');
 }
 
 /**
+ * The regexp pattern filter which constrains which tests to run
+ * based on their descriptions.
+ */
+
+String filter = null;
+
+/**
  * Creates a new test case with the given description and body. The
  * description will include the descriptions of any surrounding group()
  * calls.
  */
 void test(String spec, TestFunction body) {
   ensureInitialized();
 
   _tests.add(new TestCase(_tests.length + 1, _fullSpec(spec), body, 0));
 }
 
@@ skipping 379 matching lines @@
   });
   port.toSendPort().send(null, null);
 }
 
 /** Runs all queued tests, one at a time. */
 _runTests() {
   // If we are soloing a test, remove all the others.
   if (_soloTest != null) {
     _tests = _tests.filter((t) => t == _soloTest);
   }
+  if (filter != null) {
+    RegExp re = new RegExp(filter);
+    _tests = _tests.filter((t) => re.hasMatch(t.description));
+  }
 
   _config.onStart();
 
   _defer(() {
     assert (_currentTest == 0);
     _testRunner();
   });
 }
 
 /**
@@ skipping 102 matching lines @@
   _config.onInit();
 
   // Immediately queue the suite up. It will run after a timeout (i.e. after
   // main() has returned).
   _defer(_runTests);
 }
 
 /** Signature for a test function. */
 typedef void TestFunction();