views: Add unittests for View::RemoveAllChildViews() method.

views/view_unittest.cc

 // Copyright (c) 2011 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 <map>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "ui/base/clipboard/clipboard.h"
@@ skipping 1984 matching lines @@
   // Conversions from top_view to child with a value that should be negative.
   // This ensures we don't round up with negative numbers.
   {
     gfx::Point point(6, 18);
     View::ConvertPointToView(&top_view, child, &point);
     EXPECT_EQ(-1, point.x());
     EXPECT_EQ(-1, point.y());
   }
 }
 
+// Verify if the child views added under the root are all deleted when
+// calling RemoveAllChildViews.
+// The tree looks like this:
+// root
+// |-- child
+// |   |-- foo
+// |       |-- bar0
+// |       |-- bar1
+// +-------|-- bar2
+TEST_F(ViewTest, RemoveAllChildViews) {
+  View root;
+
+  View* child = new View();
+  root.AddChildView(child);
+
+  View* foo = new View();
+  child->AddChildView(foo);
+
+  // Add some nodes to |foo|.
+  for (int i = 0; i < 3; ++i)
+    foo->AddChildView(new View());
+
+  ASSERT_EQ(1, root.child_count());
+  ASSERT_EQ(1, child->child_count());
+  ASSERT_EQ(3, foo->child_count());
+
+  // Now remove all child views from root.
+  root.RemoveAllChildViews(true);
+
+  ASSERT_EQ(0, root.child_count());
+  ASSERT_FALSE(root.has_children());
+}
+
 TEST_F(ViewTest, Contains) {
   View v1;
   View* v2 = new View();
   View* v3 = new View();
 
   v1.AddChildView(v2);
   v2->AddChildView(v3);
 
   EXPECT_FALSE(v1.Contains(NULL));
   EXPECT_TRUE(v1.Contains(&v1));
@@ skipping 43 matching lines @@
   ASSERT_EQ(0, child1->GetIndexOf(foo1));
 
   ASSERT_EQ(-1, child2->GetIndexOf(NULL));
   ASSERT_EQ(-1, child2->GetIndexOf(&root));
   ASSERT_EQ(-1, child2->GetIndexOf(child2));
   ASSERT_EQ(-1, child2->GetIndexOf(child1));
   ASSERT_EQ(-1, child2->GetIndexOf(foo1));
 }
 
 }  // namespace views