Spit pub tests into smaller suites.

utils/tests/pub/install/sdk/check_out_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', [
+        dir('foo', [
+          libDir('foo', 'foo 0.0.1234'),
+          libPubspec('foo', '0.0.0-not.used')
+        ])
+      ])
+    ]).scheduleCreate();
+
+    dir(appPath, [
+      pubspec({"name": "myapp", "dependencies": {"foo": {"sdk": "foo"}}})
+    ]).scheduleCreate();
+
+    schedulePub(args: ['install'],
+        output: const RegExp(r"Dependencies installed!$"));
+
+    packagesDir({"foo": "0.0.1234"}).scheduleValidate();
+
+    run();
+  });
+}