[Mac] Select the previous node when the last cookie in the list is deleted.

chrome/browser/cocoa/cookies_window_controller_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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "app/tree_model.h"
 #import "base/scoped_nsobject.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/cocoa/browser_test_helper.h"
@@ skipping 343 matching lines @@
 
   EXPECT_TRUE([@"Silly Change" isEqualToString:[cocoa_node title]]);
 }
 
 TEST_F(CookiesWindowControllerTest, DeleteCookie) {
   const GURL url = GURL("http://foo.com");
   TestingProfile* profile = browser_helper_.profile();
   net::CookieMonster* cm = profile->GetCookieMonster();
   cm->SetCookie(url, "A=B");
   cm->SetCookie(url, "C=D");
+  cm->SetCookie(GURL("http://google.com"), "E=F");
 
   // This will clean itself up when we call |-closeSheet:|. If we reset the
   // scoper, we'd get a double-free.
   CookiesWindowController* controller =
       [[CookiesWindowController alloc] initWithProfile:profile
                                         databaseHelper:database_helper_
                                          storageHelper:local_storage_helper_
                                         appcacheHelper:appcache_helper_];
   [controller attachSheetTo:test_window()];
   NSTreeController* treeController = [controller treeController];
 
-  // Pretend to select cookie A.
-  NSUInteger path[3] = {0, 0, 0};
-  NSIndexPath* indexPath = [NSIndexPath indexPathWithIndexes:path length:3];
+  // Select cookie A.
+  NSUInteger pathA[3] = {0, 0, 0};
+  NSIndexPath* indexPath = [NSIndexPath indexPathWithIndexes:pathA length:3];
   [treeController setSelectionIndexPath:indexPath];
 
   // Press the "Delete" button.
   [controller deleteCookie:nil];
 
   // Root --> foo.com --> Cookies.
   NSArray* cookies = [[[[[[controller cocoaTreeModel] children]
       objectAtIndex:0] children] objectAtIndex:0] children];
   EXPECT_EQ(1U, [cookies count]);
   EXPECT_TRUE([@"C" isEqualToString:[[cookies lastObject] title]]);
   EXPECT_TRUE([indexPath isEqual:[treeController selectionIndexPath]]);
 
+  // Select cookie E.
+  NSUInteger pathE[3] = {1, 0, 0};
+  indexPath = [NSIndexPath indexPathWithIndexes:pathE length:3];
+  [treeController setSelectionIndexPath:indexPath];
+
+  // Perform delete.
+  [controller deleteCookie:nil];
+
+  // Make sure that both the domain level node and the Cookies folder node got
+  // deleted because there was only one leaf node.
+  EXPECT_EQ(1U, [[[controller cocoaTreeModel] children] count]);
+
+  // Select cookie C.
+  NSUInteger pathC[3] = {0, 0, 0};
+  indexPath = [NSIndexPath indexPathWithIndexes:pathC length:3];
+  [treeController setSelectionIndexPath:indexPath];
+
+  // Perform delete.
+  [controller deleteCookie:nil];
+
+  // Make sure the world didn't explode and that there's nothing in the tree.
+  EXPECT_EQ(0U, [[[controller cocoaTreeModel] children] count]);
+
   [controller closeSheet:nil];
 }
 
 TEST_F(CookiesWindowControllerTest, DidExpandItem) {
   const GURL url = GURL("http://foo.com");
   TestingProfile* profile = browser_helper_.profile();
   net::CookieMonster* cm = profile->GetCookieMonster();
   cm->SetCookie(url, "A=B");
   cm->SetCookie(url, "C=D");
 
@@ skipping 300 matching lines @@
   // Local Storage --> origin2.
   node = [[node children] lastObject];
   EXPECT_TRUE([@"origin2" isEqualToString:[node title]]);
   EXPECT_EQ(kCocoaCookieDetailsTypeTreeLocalStorage, [node nodeType]);
   EXPECT_TRUE([@"origin2" isEqualToString:[[node details] domain]]);
   EXPECT_TRUE([[node details] lastModified]);
   EXPECT_TRUE([[node details] fileSize]);
 }
 
 }  // namespace