Take Sam Elkhateeb's path for "path" dependencies and clean it up some.

utils/tests/pub/install/path/no_pubspec_test.dart

+// Copyright (c) 2013, 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.
+
+import 'dart:io';
+
+import '../../../../../pkg/path/lib/path.dart' as path;
+
+import '../../test_pub.dart';
+
+main() {
+  initConfig();
+  integration('path dependency to non-package directory', () {
+    // Make an empty directory.
+    dir('foo').scheduleCreate();
+    var fooPath = path.join(sandboxDir, "foo");
+
+    dir(appPath, [
+      pubspec({
+        "name": "myapp",
+        "dependencies": {
+          "foo": {"path": fooPath}
+        }
+      })
+    ]).scheduleCreate();
+
+    schedulePub(args: ['install'],
+        error:
+            new RegExp('Package "foo" doesn\'t have a pubspec.yaml file.'),
+        exitCode: 1);
+  });
+}