Audio indicator: Mac UI

chrome/browser/ui/cocoa/tabs/tab_audio_indicator_view_mac_unittest.mm

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import "chrome/browser/ui/cocoa/tabs/tab_audio_indicator_view_mac.h"
+
+#include "base/message_loop.h"
+#import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
+
+class TabAudioIndicatorViewMacTest : public CocoaTest {
+ protected:
+  TabAudioIndicatorViewMacTest() {
+    scoped_nsobject<TabAudioIndicatorViewMac> view(
+        [[TabAudioIndicatorViewMac alloc]
+            initWithFrame:NSMakeRect(0, 0, 16, 16)]);
+    view_ = view.get();
+    [[test_window() contentView] addSubview:view_];
+
+    scoped_nsobject<NSImage> image(
+        [[NSImage alloc] initWithSize:NSMakeSize(16, 16)]);
+    [image lockFocus];
+    NSRectFill(NSMakeRect(0, 0, 16, 16));
+    [image unlockFocus];
+
+    [view_ setBackgroundImage:image];
+    [view_ setIsPlayingAudio:YES];
+  }
+
+  TabAudioIndicatorViewMac* view_;
+  MessageLoopForUI message_loop_;  // Needed for ui::LinearAnimation.
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TabAudioIndicatorViewMacTest);
+};
+
+TEST_VIEW(TabAudioIndicatorViewMacTest, view_)