Reorganize tests for samples so the test is discoverable from the sample

samples/tests/samples/lib/util/util_test.dart

Index: samples/tests/samples/lib/util/util_test.dart
diff --git a/samples/tests/samples/lib/util/util_test.dart b/samples/tests/samples/lib/util/util_test.dart
deleted file mode 100644
index c6fd0ef4110b16bbf7ecf8659f946a3dd0521cc2..0000000000000000000000000000000000000000
--- a/samples/tests/samples/lib/util/util_test.dart
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright (c) 2011, 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 util_tests;
-
-import 'dart:html';
-import '../../../../../pkg/unittest/lib/unittest.dart';
-import '../../../../../pkg/unittest/lib/html_config.dart';
-import '../../../../swarm/swarm_ui_lib/util/utilslib.dart';
-
-main() {
-  useHtmlConfiguration();
-  test('insertAt', () {
-    var a = [];
-    CollectionUtils.insertAt(a, 0, 1);
-    expect(a, orderedEquals([1]));
-
-    CollectionUtils.insertAt(a, 0, 2);
-    expect(a, orderedEquals([2, 1]));
-
-    CollectionUtils.insertAt(a, 0, 5);
-    CollectionUtils.insertAt(a, 0, 4);
-    CollectionUtils.insertAt(a, 0, 3);
-    expect(a, orderedEquals([3, 4, 5, 2, 1]));
-
-    a = [];
-    CollectionUtils.insertAt(a, 0, 1);
-    expect(a, orderedEquals([1]));
-
-    CollectionUtils.insertAt(a, 1, 2);
-    expect(a, orderedEquals([1, 2]));
-
-    CollectionUtils.insertAt(a, 1, 3);
-    CollectionUtils.insertAt(a, 3, 4);
-    CollectionUtils.insertAt(a, 3, 5);
-    expect(a, orderedEquals([1, 3, 2, 5, 4]));
-  });
-
-  test('defaultString', () {
-    expect(StringUtils.defaultString(null), isEmpty);
-    expect(StringUtils.defaultString(''), isEmpty);
-    expect(StringUtils.defaultString('test'), equals('test'));
-  });
-}