Spit pub tests into smaller suites.

utils/tests/pub/update/hosted/fail_gracefully_on_url_resolve_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('fails gracefully if the url does not resolve', () {
+    dir(appPath, [
+      pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {
+            "hosted": {
+              "name": "foo",
+              "url": "http://pub.invalid"
+            }
+          }
+         }
+      })
+    ]).scheduleCreate();
+
+    schedulePub(args: ['update'],
+        error: const RegExp('Could not resolve URL "http://pub.invalid".'),
+        exitCode: 1);
+
+    run();
+  });
+}