Spit pub tests into smaller suites.

utils/tests/pub/install/git/check_out_twice_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 Git twice', () {
+    ensureGit();
+
+    git('foo.git', [
+      libDir('foo'),
+      libPubspec('foo', '1.0.0')
+    ]).scheduleCreate();
+
+    appDir([{"git": "../foo.git"}]).scheduleCreate();
+
+    schedulePub(args: ['install'],
+        output: const RegExp(r"Dependencies installed!$"));
+
+    dir(cachePath, [
+      dir('git', [
+        dir('cache', [gitPackageRepoCacheDir('foo')]),
+        gitPackageRevisionCacheDir('foo')
+      ])
+    ]).scheduleValidate();
+
+    dir(packagesPath, [
+      dir('foo', [
+        file('foo.dart', 'main() => "foo";')
+      ])
+    ]).scheduleValidate();
+
+    // TODO(nweiz): remove this once we support pub update
+    dir(packagesPath).scheduleDelete();
+
+    // Verify that nothing breaks if we install a Git revision that's already
+    // in the cache.
+    schedulePub(args: ['install'],
+        output: const RegExp(r"Dependencies installed!$"));
+
+    run();
+  });
+}