Split pub tests into separate suites.

utils/tests/pub/pub_install_sdk_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('pub_tests');
+
+#import('dart:io');
+
+#import('test_pub.dart');
+#import('../../../pkg/unittest/unittest.dart');
+
+main() {
+  test('checks out a package from the SDK', () {
+    dir(sdkPath, [
+      file('revision', '1234'),
+      dir('pkg', [packageDir("foo", "0.0.1234")])
+    ]).scheduleCreate();
+
+    dir(appPath, [
+      pubspec({"dependencies": {"foo": null}})
+    ]).scheduleCreate();
+
+    schedulePub(args: ['install'],
+        output: '''
+        Dependencies installed!
+        ''');
+
+    packagesDir({"foo": "0.0.1234"}).scheduleValidate();
+
+    run();
+  });
+}