Added test setup/teardown.

lib/unittest/unittest.dart

Index: lib/unittest/unittest.dart
===================================================================
--- lib/unittest/unittest.dart	(revision 8828)
+++ lib/unittest/unittest.dart	(working copy)
@@ -175,6 +175,12 @@
  */
 Function _testRunner;
 
+/** Setup function called before each test in a group */
+Function _testSetup;
+
+/** Teardown function called after each test in a group */
+Function _testTeardown;
+
 /** Current test being executed. */
 int _currentTest = 0;
 
@@ -504,11 +510,12 @@
  * Creates a new named group of tests. Calls to group() or test() within the
  * body of the function passed to this will inherit this group's description.
  */
-void group(String description, void body()) {
+void group(String description, void body(),
+           [Function setupTest, Function teardownTest]) {

[Bob Nystrom, 2012/06/19 23:38:33]

Instead of taking these functions as arguments, how about making separate
setUp() and tearDown() functions to register them, like:

group('some group', () {
  setUp(() {
    print('setting up...');
  });

  tearDown(() {
    print('tearing down...');
  });

  test('some test', () {
    print('this will print between "setting up" and "tearing down"');
  });
});

[gram, 2012/06/20 17:44:14]

Done.

   ensureInitialized();
 
   // Concatenate the new group.
-  final oldGroup = _currentGroup;
+  final parentGroup = _currentGroup;
   if (_currentGroup != '') {
     // Add a space.
     _currentGroup = '$_currentGroup $description';
@@ -517,11 +524,20 @@
     _currentGroup = description;
   }
 
+  // Groups can be nested, so we need to preserve the current
+  // settings for test setup/teardown

[Bob Nystrom, 2012/06/19 23:38:33]

.

[gram, 2012/06/20 17:44:14]

Done.

+  Function parentSetup = _testSetup;
+  Function parentTeardown = _testTeardown;
+
   try {
+    _testSetup = setupTest;
+    _testTeardown = teardownTest;
     body();
   } finally {
     // Now that the group is over, restore the previous one.
-    _currentGroup = oldGroup;
+    _currentGroup = parentGroup;
+    _testSetup = parentSetup;
+    _testTeardown = parentTeardown;
   }
 }
 
@@ -648,7 +664,7 @@
     guardAsync(() {
       _callbacksCalled = 0;
       _state = _RUNNING_TEST;
-      testCase.test();
+      testCase.run();
 
       if (_state != _UNCAUGHT_ERROR) {
         if (testCase.callbacks == _callbacksCalled) {