Spit pub tests into smaller suites.

utils/tests/pub/update/hosted/remove_removed_transitive_dependency_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("removes a transitive dependency that's no longer depended on", () {
+    servePackages([
+      package("foo", "1.0.0", [dependency("shared-dep")]),
+      package("bar", "1.0.0", [
+        dependency("shared-dep"),
+        dependency("bar-dep")
+      ]),
+      package("shared-dep", "1.0.0"),
+      package("bar-dep", "1.0.0")
+    ]);
+
+    appDir([dependency("foo"), dependency("bar")]).scheduleCreate();
+
+    schedulePub(args: ['update'],
+        output: const RegExp(r"Dependencies updated!$"));
+
+    packagesDir({
+      "foo": "1.0.0",
+      "bar": "1.0.0",
+      "shared-dep": "1.0.0",
+      "bar-dep": "1.0.0",
+    }).scheduleValidate();
+
+    appDir([dependency("foo")]).scheduleCreate();
+
+    schedulePub(args: ['update'],
+        output: const RegExp(r"Dependencies updated!$"));
+
+    packagesDir({
+      "foo": "1.0.0",
+      "bar": null,
+      "shared-dep": "1.0.0",
+      "bar-dep": null,
+    }).scheduleValidate();
+
+    run();
+  });
+}