Use the new test runner.

test/pubspec_test.dart

 // 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 pubspec_test;
 
 import 'dart:async';
 
 import 'package:pub/src/package.dart';
 import 'package:pub/src/pubspec.dart';
 import 'package:pub/src/source.dart';
 import 'package:pub/src/source/path.dart';
 import 'package:pub/src/source_registry.dart';
 import 'package:pub_semver/pub_semver.dart';
-import 'package:unittest/unittest.dart';
+import 'package:test/test.dart';
 
 import 'test_pub.dart';
 
 class MockSource extends Source {
   final String name = "mock";
 
   Future<Pubspec> doDescribe(PackageId id) => throw new UnsupportedError(
       "Cannot describe mock packages.");
 
   Future get(PackageId id, String symlink) => throw new UnsupportedError(
       "Cannot get a mock package.");
 
   Future<String> getDirectory(PackageId id) => throw new UnsupportedError(
       "Cannot get the directory for mock packages.");
 
   dynamic parseDescription(String filePath, description,
                            {bool fromLockFile: false}) {
     if (description != 'ok') throw new FormatException('Bad');
     return description;
   }
 
   bool descriptionsEqual(description1, description2) =>
       description1 == description2;
 
   String packageName(description) => 'foo';
 }
 
 main() {
-  initConfig();
   group('parse()', () {
     var sources = new SourceRegistry();
     sources.register(new MockSource());
     sources.register(new PathSource());
 
     var throwsPubspecException =
-      throwsA(new isInstanceOf<PubspecException>('PubspecException'));
+      throwsA(new isInstanceOf<PubspecException>());

[Bob Nystrom, 2015/06/26 23:04:10]

Indent +4.

 
     expectPubspecException(String contents, fn(Pubspec pubspec),
         [String expectedContains]) {
       var expectation = throwsPubspecException;
       if (expectedContains != null) {
         expectation = throwsA(allOf(
-            new isInstanceOf<PubspecException>('PubspecException'),
+            new isInstanceOf<PubspecException>(),
             predicate((error) => error.message.contains(expectedContains))));
       }
 
       var pubspec = new Pubspec.parse(contents, sources);
       expect(() => fn(pubspec), expectation);
     }
 
     test("doesn't eagerly throw an error for an invalid field", () {
       // Shouldn't throw an error.
       new Pubspec.parse('version: not a semver', sources);
@@ skipping 454 matching lines @@
       test("uses the key if the value is null", () {
         var pubspec = new Pubspec.parse('''
 executables:
   command:
 ''', sources);
         expect(pubspec.executables['command'], equals('command'));
       });
     });
   });
 }