Updates to clean up default theme and add hover states

chrome/browser/cocoa/gradient_button_cell_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/gradient_button_cell.h"
 #import "chrome/browser/cocoa/cocoa_test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+@interface GradientButtonCell (HoverValueTesting)
+- (void)adjustHoverValue;
+@end
+
 namespace {
 
 class GradientButtonCellTest : public testing::Test {
  public:
   GradientButtonCellTest() {
     NSRect frame = NSMakeRect(0, 0, 50, 30);
     view_.reset([[NSButton alloc] initWithFrame:frame]);
     scoped_nsobject<GradientButtonCell> cell([[GradientButtonCell alloc]
                                               initTextCell:@"Testing"]);
     [view_ setCell:cell.get()];
     [cocoa_helper_.contentView() addSubview:view_.get()];
   }
 
   CocoaTestHelper cocoa_helper_;  // Inits Cocoa, creates window, etc...
   scoped_nsobject<NSButton> view_;
 };
 
 // Test adding/removing from the view hierarchy, mostly to ensure nothing
 // leaks or crashes.
 TEST_F(GradientButtonCellTest, AddRemove) {
   EXPECT_EQ(cocoa_helper_.contentView(), [view_ superview]);
   [view_.get() removeFromSuperview];
   EXPECT_FALSE([view_ superview]);
 }
 
 // Test drawing, mostly to ensure nothing leaks or crashes.
 TEST_F(GradientButtonCellTest, Display) {
+  [[view_ cell] setHoverAlpha:0.0];
   [view_ display];
+  [[view_ cell] setHoverAlpha:0.5];
+  [view_ display];
+  [[view_ cell] setHoverAlpha:1.0];
+  [view_ display];
+}
+
+// Test drawing, mostly to ensure nothing leaks or crashes.
+TEST_F(GradientButtonCellTest, Hover) {
+  GradientButtonCell* cell = [view_ cell];
+  [cell setMouseInside:YES animate:NO];
+  EXPECT_EQ([[view_ cell] hoverAlpha], 1.0);
+
+  [cell setMouseInside:NO animate:YES];
+  CGFloat alpha1 = [cell hoverAlpha];
+  [cell adjustHoverValue];
+  CGFloat alpha2 = [cell hoverAlpha];
+  EXPECT_TRUE(alpha2 < alpha1);
 }
 
 // Tracking rects
 TEST_F(GradientButtonCellTest, TrackingRects) {
   GradientButtonCell* cell = [view_ cell];
   EXPECT_FALSE([cell showsBorderOnlyWhileMouseInside]);
   EXPECT_FALSE([cell isMouseInside]);
 
   [cell setShowsBorderOnlyWhileMouseInside:YES];
   [cell mouseEntered:nil];
   EXPECT_TRUE([cell isMouseInside]);
   [cell mouseExited:nil];
   EXPECT_FALSE([cell isMouseInside]);
 
   [cell setShowsBorderOnlyWhileMouseInside:NO];
   EXPECT_FALSE([cell isMouseInside]);
 
   [cell setShowsBorderOnlyWhileMouseInside:YES];
   [cell setShowsBorderOnlyWhileMouseInside:YES];
   [cell setShowsBorderOnlyWhileMouseInside:NO];
   [cell setShowsBorderOnlyWhileMouseInside:NO];
 }
 
 }  // namespace