[Mac] Updates the unit test with some minor tweaks to the Browser Actions con...

chrome/browser/cocoa/extensions/browser_actions_container_view_unittest.mm

 // Copyright (c) 2010 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.
 
 #include "base/scoped_nsobject.h"
 #import "chrome/browser/cocoa/cocoa_test_helper.h"
 #import "chrome/browser/cocoa/extensions/browser_actions_container_view.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/platform_test.h"
 
 namespace {
 
 const CGFloat kContainerHeight = 15.0;
+const CGFloat kMinimumContainerWidth = 10.0;
 
 class BrowserActionsContainerViewTest : public CocoaTest {
  public:
   virtual void SetUp() {
     CocoaTest::SetUp();
     view_.reset([[BrowserActionsContainerView alloc]
         initWithFrame:NSMakeRect(0, 0, 0, kContainerHeight)]);
   }
 
   scoped_nsobject<BrowserActionsContainerView> view_;
 };
 
 TEST_F(BrowserActionsContainerViewTest, BasicTests) {
   EXPECT_TRUE([view_ isResizable]);
   EXPECT_TRUE([view_ canDragLeft]);
   EXPECT_TRUE([view_ canDragRight]);
   EXPECT_TRUE([view_ isHidden]);
 }
 
+TEST_F(BrowserActionsContainerViewTest, SetWidthTests) {
+  // Try setting below the minimum width (10 pixels).
+  [view_ resizeToWidth:5.0 animate:NO];
+  EXPECT_EQ(kMinimumContainerWidth, NSWidth([view_ frame])) << "Frame width is "
+      << "less than the minimum allowed.";
+  // Since the frame expands to the left, the x-position delta value will be
+  // negative.
+  EXPECT_EQ(-kMinimumContainerWidth, [view_ resizeDeltaX]);
+
+  [view_ resizeToWidth:35.0 animate:NO];
+  EXPECT_EQ(35.0, NSWidth([view_ frame]));
+  EXPECT_EQ(-25.0, [view_ resizeDeltaX]);
+
+  [view_ resizeToWidth:20.0 animate:NO];
+  EXPECT_EQ(20.0, NSWidth([view_ frame]));
+  EXPECT_EQ(15.0, [view_ resizeDeltaX]);
+}
+
 }  // namespace