Unit tests for the unit test library.

tests/lib/unittest/unittest_test.dart

Index: tests/lib/unittest/unittest_test.dart
===================================================================
--- tests/lib/unittest/unittest_test.dart	(revision 0)
+++ tests/lib/unittest/unittest_test.dart	(revision 0)
@@ -0,0 +1,159 @@
+// 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('unittestTest');
+#import('dart:isolate');
+#import('../../../lib/unittest/unittest.dart');
+
+var tests;
+var expected;
+var actual;
+var _testconfig;
+
+_defer(void fn()) {
+  // Exploit isolate ports as a platform-independent mechanism to queue a
+  // message at the end of the event loop. Stolen from unittest.dart.
+  final port = new ReceivePort();
+  port.receive((msg, reply) {
+    fn();
+    port.close();
+  });
+  port.toSendPort().send(null, null);
+}
+
+class TestConfiguration extends Configuration {
+  int x = 0;
+  String setup = '';
+  String teardown = '';
+  SendPort _port;
+
+  TestConfiguration(this._port);
+
+  void onDone(int passed, int failed, int errors, List<TestCase> results,
+      String uncaughtError) {
+    var result = '$passed:$failed:$errors:${results.length}:${x}:'
+        '${setup}:${teardown}:$uncaughtError';

[eub, 2012/06/21 00:09:42]

$uncaughtError unused here?

[gram, 2012/06/21 16:48:16]

Currently, as I did not find anything that triggered it, but it may pop up in
future, and is passed to onDone, so I think it is worth capturing.

+    for (var i = 0; i < results.length; i++) {
+      result = '$result:${results[i].description}:'
+          '${collapseWhitespace(results[i].message)}';
+    }
+    _port.send(result);
+  }
+}
+
+callback() {

[eub, 2012/06/21 00:09:42]

I'm missing where this is used.

[gram, 2012/06/21 16:48:16]

I went through many iterations (before isolates and with isolates) trying to get
this stuff to work; there are some artifacts from that. Removed.

+  if (++_testconfig.x < 10) {
+    _defer(callback);
+  }
+}
+
+runTest() {
+  port.receive((testName, sendport) {
+    configure(_testconfig = new TestConfiguration(sendport));
+    if (testName == 'single correct test') {
+      test(testName, () => expect(2 + 3, equals(5)));
+    } else if (testName == 'single failing test') {
+      test(testName, () => expect(2 + 2, equals(5)));
+    } else if (testName == 'exception test') {
+      test(testName, () { throw new Exception('fail'); });
+    } else if (testName == 'group name test') {
+      group('a', () {
+        test('a', () {});
+        group('b', () {
+          test('b', () {});
+        });
+      });
+    } else if (testName == 'setup test') {
+      group('a', () {
+        setUp(() { _testconfig.setup = 'setup'; });
+        test(testName, () {});
+      });
+    } else if (testName == 'teardown test') {
+      group('a', () {
+        tearDown(() { _testconfig.teardown = 'teardown'; });
+        test(testName, () {});
+      });
+    } else if (testName == 'setup and teardown test') {
+      group('a', () {
+        setUp(() { _testconfig.setup = 'setup'; });
+        tearDown(() { _testconfig.teardown = 'teardown'; });
+        test(testName, () {});
+      });
+    } else if (testName == 'correct callback test') {
+      test(testName,
+        () =>_defer(expectAsync0((){ ++_testconfig.x;})));
+    } else if (testName == 'excess callback test') {
+      test(testName, () {
+        var _callback = expectAsync0((){ ++_testconfig.x;});
+        _defer(_callback);
+        _defer(_callback);
+      });
+    } else if (testName == 'completion test') {
+      test(testName, () {
+             var _callback;
+             _callback = expectAsyncUntil0(() {
+               if (++_testconfig.x < 10) {
+                 _defer(_callback);
+               }
+             },
+             () => (_testconfig.x == 10));
+             _defer(_callback);
+      });
+    } else if (testName == 'setup and teardown test') {

[eub, 2012/06/21 00:09:42]

Duplicate 'setup and teardown test'.

[gram, 2012/06/21 16:48:16]

Done.

+      group('a', () {
+        setUp(() { _testconfig.setup = 'setup'; });
+        tearDown(() { _testconfig.teardown = 'teardown'; });
+        test(testName, () {});
+      });
+    }
+  });
+}
+
+void nextTest(int testNum) {
+  SendPort sport = spawnFunction(runTest);
+  sport.call(tests[testNum]).then((msg) {
+    actual.add(msg);
+    if (actual.length == expected.length) {
+      for (var i = 0; i < tests.length; i++) {
+        test(tests[i], () => expect(actual[i], equals(expected[i])));
+      }
+    } else {
+      nextTest(testNum+1);
+    }
+  });
+}
+
+main() {
+  tests = [
+    'single correct test',
+    'single failing test',
+    'exception test',
+    'group name test',
+    'setup test',
+    'teardown test',
+    'setup and teardown test',
+    'correct callback test',
+    'excess callback test',
+    'completion test'
+  ];
+
+  expected = [
+    '1:0:0:1:0:::null:single correct test:',

[eub, 2012/06/21 00:09:42]

Comment w/ structure reference.
passed : failed : errors : results : testconfig x : setup : teardown :
uncaughtError[?] : description : message

+    '0:1:0:1:0:::null:single failing test:Expected: <5> but: was <4>',

[eub, 2012/06/21 00:09:42]

BTW, might like a helper to construct these strings, w/ some positional args,
some named.

+    '0:1:0:1:0:::null:exception test:Caught Exception: fail',
+    '2:0:0:2:0:::null:a a::a b b:',
+    '1:0:0:1:0:setup::null:a setup test:',
+    '1:0:0:1:0::teardown:null:a teardown test:',
+    '1:0:0:1:0:setup:teardown:null:a setup and teardown test:',
+    '1:0:0:1:1:::null:correct callback test:',
+    '0:0:1:1:1:::null:excess callback test:'
+        'Callback called more times than expected (2 > 1)',
+    '1:0:0:1:10:::null:completion test:'
+  ];
+
+  actual = [];
+
+  nextTest(0);
+}
+