(Mac) Added unit tests for ClickHoldButtonCell and DelayedMenuButton.

chrome/browser/cocoa/delayedmenu_button_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"
+#import "chrome/browser/cocoa/clickhold_button_cell.h"
+#import "chrome/browser/cocoa/cocoa_test_helper.h"
+#import "chrome/browser/cocoa/delayedmenu_button.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+
+namespace {
+
+class DelayedMenuButtonTest : public PlatformTest {
+ public:
+  DelayedMenuButtonTest() {
+    NSRect frame = NSMakeRect(0, 0, 50, 30);
+    button_.reset([[DelayedMenuButton alloc] initWithFrame:frame]);
+    scoped_nsobject<ClickHoldButtonCell> cell(
+        [[ClickHoldButtonCell alloc] initTextCell:@"Testing"]);
+    [button_ setCell:cell.get()];
+    [cocoa_helper_.contentView() addSubview:button_.get()];
+  }
+
+  scoped_nsobject<DelayedMenuButton> button_;
+  CocoaTestHelper cocoa_helper_;            // Inits Cocoa, creates window, etc.
+};
+
+// Test adding/removing from the view hierarchy, mostly to ensure nothing leaks
+// or crashes.
+TEST_F(DelayedMenuButtonTest, AddRemove) {
+  EXPECT_EQ(cocoa_helper_.contentView(), [button_ superview]);
+  [button_.get() removeFromSuperview];
+  EXPECT_FALSE([button_ superview]);
+}
+
+// Test drawing, mostly to ensure nothing leaks or crashes.
+TEST_F(DelayedMenuButtonTest, Display) {
+  [button_ display];
+}
+
+// Test assigning and enabling a menu, again mostly to ensure nothing leaks or
+// crashes.
+TEST_F(DelayedMenuButtonTest, MenuAssign) {
+  scoped_nsobject<NSMenu> menu([[NSMenu alloc] initWithTitle:@""]);
+  ASSERT_TRUE(menu.get());
+
+  [menu insertItemWithTitle:@"" action:nil keyEquivalent:@"" atIndex:0];
+  [menu insertItemWithTitle:@"foo" action:nil keyEquivalent:@"" atIndex:1];
+  [menu insertItemWithTitle:@"bar" action:nil keyEquivalent:@"" atIndex:2];
+  [menu insertItemWithTitle:@"baz" action:nil keyEquivalent:@"" atIndex:3];
+  
+  [button_ setMenu:menu];
+  EXPECT_TRUE([button_ menu]);
+
+  [button_ setMenuEnabled:YES];
+  EXPECT_TRUE([button_ menuEnabled]);
+
+  // TODO(viettrungluu): Display the menu. (Calling DelayedMenuButton's private
+  // |-menuAction:| method displays it fine, but the problem is getting rid of
+  // the menu. We can catch the |NSMenuDidBeginTrackingNotification| from |menu|
+  // fine, but then |-cancelTracking| doesn't dismiss it. I don't know why.)
+}
+
+// TODO(viettrungluu): Test the two actions of the button (the normal one and
+// displaying the menu, also making sure the latter drags correctly)? It would
+// require "emulating" a mouse....
+
+}  // namespace