Don't implicitly run "pub get".

test/transformer/cache_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.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 'package:scheduled_test/scheduled_stream.dart';
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
@@ skipping 130 matching lines @@
           "foo": "1.2.3",
           "bar": "1.2.3"
         },
         "transformers": ["foo", "bar"]
       }),
       d.dir("bin", [
         d.file("myapp.dart", "main() => print('Hello!');")
       ])
     ]).create();
 
+    pubGet();
     process = pubRun(args: ['myapp']);
     process.stdout.expect("See ya!");
     process.shouldExit();
 
     d.dir(appPath, [
       d.dir(".pub/transformers", [
         d.file("manifest.txt", "0.1.2+3\nbar,foo"),
         d.matcherFile("transformers.snapshot", isNot(isEmpty))
       ])
     ]).validate();
@@ skipping 138 matching lines @@
           // around issue 20498.
           "baz": "1.2.3"
         },
         "transformers": ["foo"]
       }),
       d.dir("bin", [
         d.file("myapp.dart", "main() => print('Hello!');")
       ])
     ]).create();
 
+    pubGet();
     process = pubRun(args: ['myapp']);
-    process.stdout.expect(
-        "Your pubspec has changed, so we need to update your lockfile:");
-    process.stdout.expect(consumeThrough("Goodbye!"));
+    process.stdout.expect("Goodbye!");
     process.shouldExit();
 
     // "bar" should still be in the manifest, since there's no reason to
     // recompile the cache.
     d.dir(appPath, [
       d.dir(".pub/transformers", [
         d.file("manifest.txt", "0.1.2+3\nbar,foo"),
         d.matcherFile("transformers.snapshot", isNot(isEmpty))
       ])
     ]).validate();
@@ skipping 14 matching lines @@
   Future apply(Transform transform) {
     return transform.primaryInput.readAsString().then((contents) {
       transform.addOutput(new Asset.fromString(
           transform.primaryInput.id,
           contents.replaceAll("$input", "$output")));
     });
   }
 }
 """;
 }