Add a bare-bones extension shelf that displays extension items on OS X.

chrome/browser/cocoa/extension_shelf_controller_unittest.mm

+// Copyright (c) 2009 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 <Cocoa/Cocoa.h>
+
+#include "base/scoped_nsobject.h"
+#include "chrome/browser/cocoa/browser_test_helper.h"
+#import "chrome/browser/cocoa/cocoa_test_helper.h"
+#import "chrome/browser/cocoa/extension_shelf_controller.h"
+#import "chrome/browser/cocoa/view_resizer_pong.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+namespace {
+
+class ExtensionShelfControllerTest : public PlatformTest {
+ public:
+  ExtensionShelfControllerTest() {
+    resizeDelegate_.reset([[ViewResizerPong alloc] init]);
+
+    NSRect frame = NSMakeRect(0, 0, 100, 30);
+    controller_.reset([[ExtensionShelfController alloc]
+        initWithBrowser:helper_.browser()
+         resizeDelegate:resizeDelegate_.get()]);
+  }
+
+  CocoaTestHelper cocoa_helper_;  // Inits Cocoa, creates window, etc...
+  BrowserTestHelper helper_;
+  scoped_nsobject<ExtensionShelfController> controller_;
+  scoped_nsobject<ViewResizerPong> resizeDelegate_;
+};
+
+// Check that |hide:| tells the delegate to set the shelf's height to zero.
+TEST_F(ExtensionShelfControllerTest, HideSetsHeightToZero) {
+  [resizeDelegate_ setHeight:10];
+  [controller_ hide:nil];
+  EXPECT_EQ(0, [resizeDelegate_ height]);
+}
+
+// Check that |show:| tells the delegate to set the shelf's height to the
+// shelf's desired height.
+TEST_F(ExtensionShelfControllerTest, ShowSetsHeightToHeight) {
+  [resizeDelegate_ setHeight:0];
+  [controller_ show:nil];
+  EXPECT_GT([controller_ height], 0);
+  EXPECT_EQ([controller_ height], [resizeDelegate_ height]);
+}
+
+// Test adding to the view hierarchy, mostly to ensure nothing leaks or crashes.
+TEST_F(ExtensionShelfControllerTest, Add) {
+  [cocoa_helper_.contentView() addSubview:[controller_ view]];
+  [controller_ wasInsertedIntoWindow];
+}
+
+}  // namespace