Move client/{base, observable, layout, touch, util, view} to samples/ui_lib .

samples/tests/samples/src/lib/observable/ObservableValueTests.dart

Index: samples/tests/samples/src/lib/observable/ObservableValueTests.dart
===================================================================
--- samples/tests/samples/src/lib/observable/ObservableValueTests.dart	(revision 0)
+++ samples/tests/samples/src/lib/observable/ObservableValueTests.dart	(revision 0)
@@ -0,0 +1,42 @@
+// 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.
+
+testObservableValue() {
+  test('ObservableValue', () {
+    final value = new ObservableValue<String>('initial');
+    expect(value.value).equals('initial');
+
+    // Set value.
+    value.value = 'new';
+    expect(value.value).equals('new');
+
+    // Change event is sent when value is changed.
+    EventSummary result = null;
+    value.addChangeListener((summary) {
+      expect(result).isNull();
+      result = summary;
+      expect(result).isNotNull();
+    });
+
+    value.value = 'newer';
+
+    expect(result).isNotNull();
+    expect(result.events.length).equals(1);
+    validateUpdate(result.events[0], value, 'value', null, 'newer', 'new');
+  });
+
+  test('does not raise event if unchanged', () {
+    final value = new ObservableValue<String>('foo');
+    expect(value.value).equals('foo');
+
+    bool called = false;
+    value.addChangeListener((summary) { called = true; });
+
+    // Set it to the same value.
+    value.value = 'foo';
+
+    // Should not have gotten an event.
+    expect(called).equals(false);
+  });
+}