pkg/docgen: updated min dependencies of args and unittest

pkg/docgen/test/single_library_test.dart

 library single_library_test;
 
 import 'dart:io';
 
 import 'package:path/path.dart' as path;
 import 'package:unittest/unittest.dart';
 
 import '../lib/docgen.dart';
 import '../../../sdk/lib/_internal/compiler/implementation/mirrors/mirrors_util.dart'
     as dart2js_util;
@@ skipping 30 matching lines @@
   }
 ''';
 
 main() {
   group('Generate docs for', () {
     test('one simple file.', () {
       var temporaryDir = Directory.systemTemp.createTempSync('single_library_');
       var fileName = path.join(temporaryDir.path, 'temp.dart');
       var file = new File(fileName);
       file.writeAsStringSync(DART_LIBRARY);
-      getMirrorSystem([new Uri.file(fileName)])
-        .then(expectAsync1((mirrorSystem) {
+
+      return getMirrorSystem([new Uri.file(fileName)])

[Alan Knight, 2014/02/19 19:00:46]

Same here.

+        .then((mirrorSystem) {
           var testLibraryUri = new Uri.file(path.absolute(fileName),
                                             windows: Platform.isWindows);
           var library = new Library(mirrorSystem.libraries[testLibraryUri]);
           expect(library is Library, isTrue);
 
           var classTypes = library.classes;
           var classes = [];
           classes.addAll(classTypes.values);
           classes.addAll(library.errors.values);
           expect(classes.every((e) => e is Class), isTrue);
@@ skipping 51 matching lines @@
           expect(methodParameterDocComment, 'test.A.doThis.A');
 
           // Testing trying to refer to doThis function
           var methodDocComment = method.fixReference(
               'doThis').children.first.text;
           expect(methodDocComment, 'test.A.doThis');
 
           // Testing something with no reference
           var libraryDocComment = method.fixReference('foobar').text;
           expect(libraryDocComment, 'foobar');
-        })).whenComplete(() => temporaryDir.deleteSync(recursive: true));
+        }).whenComplete(() => temporaryDir.deleteSync(recursive: true));
     });
   });
 }