Revert 241151 "Make RenderFrameHostManager swap RenderFrameHosts..."

trunk/src/content/browser/frame_host/frame_tree_unittest.cc

 // Copyright 2013 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 "content/browser/frame_host/frame_tree.h"
 
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/browser/frame_host/navigator_impl.h"
 #include "content/browser/frame_host/render_frame_host_factory.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
-#include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/test/mock_render_process_host.h"
 #include "content/public/test/test_browser_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/public/test/test_renderer_host.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 namespace {
 
 class FrameTreeTest : public RenderViewHostTestHarness {
@@ skipping 17 matching lines @@
     const char* separator = "";
     for (size_t i = 0; i < node->child_count(); i++) {
       result->append(separator);
       AppendTreeNodeState(node->child_at(i), result);
       separator = ", ";
     }
     result->append("]");
   }
 };
 
+// The root node never changes during navigation even though its
+// RenderFrameHost does.
+//  - Swapping main frame doesn't change root node.
+//  - Swapping back to NULL doesn't crash (easier tear-down for interstitials).
+//  - Main frame does not own RenderFrameHost.
+TEST_F(FrameTreeTest, RootNode) {
+  FrameTree frame_tree(new NavigatorImpl(NULL, NULL), NULL, NULL, NULL, NULL);
+
+  // Initial state has empty node.
+  FrameTreeNode* root = frame_tree.root();
+  ASSERT_TRUE(root);
+  EXPECT_FALSE(frame_tree.GetMainFrame());
+
+  // Swap in main frame.
+  RenderFrameHostImpl* dummy = reinterpret_cast<RenderFrameHostImpl*>(0x1);
+  frame_tree.SwapMainFrame(dummy);
+  EXPECT_EQ(root, frame_tree.root());
+  EXPECT_EQ(dummy, frame_tree.GetMainFrame());
+
+  // Move back to NULL.
+  frame_tree.SwapMainFrame(NULL);
+  EXPECT_EQ(root, frame_tree.root());
+  EXPECT_FALSE(frame_tree.GetMainFrame());
+
+  // Move back to an invalid pointer, let the FrameTree go out of scope. Test
+  // should not crash because the main frame isn't owned.
+  frame_tree.SwapMainFrame(dummy);
+}
+
 // Test that swapping the main frame resets the renderer-assigned frame id.
 //  - On creation, frame id is unassigned.
 //  - After a swap, frame id is unassigned.
 TEST_F(FrameTreeTest, FirstNavigationAfterSwap) {
   FrameTree frame_tree(new NavigatorImpl(NULL, NULL), NULL, NULL, NULL, NULL);
 
   EXPECT_TRUE(frame_tree.IsFirstNavigationAfterSwap());
   EXPECT_EQ(FrameTreeNode::kInvalidFrameId,
             frame_tree.root()->frame_id());
   frame_tree.OnFirstNavigationAfterSwap(1);
   EXPECT_FALSE(frame_tree.IsFirstNavigationAfterSwap());
   EXPECT_EQ(1, frame_tree.root()->frame_id());
 
-  frame_tree.ResetForMainFrameSwap();
+  frame_tree.SwapMainFrame(NULL);
   EXPECT_TRUE(frame_tree.IsFirstNavigationAfterSwap());
   EXPECT_EQ(FrameTreeNode::kInvalidFrameId,
             frame_tree.root()->frame_id());
 }
 
 // Exercise tree manipulation routines.
 //  - Add a series of nodes and verify tree structure.
 //  - Remove a series of nodes and verify tree structure.
 TEST_F(FrameTreeTest, Shape) {
-  // Use the FrameTree of the WebContents so that it has all the delegates it
-  // needs.  We may want to consider a test version of this.
-  FrameTree* frame_tree =
-      static_cast<WebContentsImpl*>(web_contents())->GetFrameTree();
+  FrameTree frame_tree(new NavigatorImpl(NULL, NULL), NULL, NULL, NULL, NULL);
 
   std::string no_children_node("no children node");
   std::string deep_subtree("node with deep subtree");
 
-  frame_tree->OnFirstNavigationAfterSwap(5);
+  // Ensure the top-level node of the FrameTree is initialized by simulating a
+  // main frame swap here.
+  scoped_ptr<RenderFrameHostImpl> render_frame_host =
+      RenderFrameHostFactory::Create(static_cast<RenderViewHostImpl*>(rvh()),
+                                     NULL,
+                                     &frame_tree,
+                                     frame_tree.root(),
+                                     process()->GetNextRoutingID(),
+                                     false);
+  frame_tree.SwapMainFrame(render_frame_host.get());
+  frame_tree.OnFirstNavigationAfterSwap(5);
 
-  ASSERT_EQ("5: []", GetTreeState(frame_tree));
+  ASSERT_EQ("5: []", GetTreeState(&frame_tree));
 
   // Simulate attaching a series of frames to build the frame tree.
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 5, 14, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 5, 15, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 5, 16, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 5, 14, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 5, 15, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 5, 16, std::string());
 
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 14, 244, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 15, 255,
-                       no_children_node);
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 14, 245, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 14, 244, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 15, 255, no_children_node);
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 14, 245, std::string());
 
   ASSERT_EQ("5: [14: [244: [], 245: []], "
                 "15: [255 'no children node': []], "
                 "16: []]",
-            GetTreeState(frame_tree));
+            GetTreeState(&frame_tree));
 
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 16, 264, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 16, 265, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 16, 266, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 16, 267, deep_subtree);
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 16, 268, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 16, 264, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 16, 265, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 16, 266, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 16, 267, deep_subtree);
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 16, 268, std::string());
 
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 267, 365, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 365, 455, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 455, 555, std::string());
-  frame_tree->AddFrame(process()->GetNextRoutingID(), 555, 655, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 267, 365, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 365, 455, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 455, 555, std::string());
+  frame_tree.AddFrame(process()->GetNextRoutingID(), 555, 655, std::string());
 
   // Now that's it's fully built, verify the tree structure is as expected.
   ASSERT_EQ("5: [14: [244: [], 245: []], "
                 "15: [255 'no children node': []], "
                 "16: [264: [], 265: [], 266: [], "
                      "267 'node with deep subtree': "
                          "[365: [455: [555: [655: []]]]], 268: []]]",
-            GetTreeState(frame_tree));
+            GetTreeState(&frame_tree));
 
-  // Test removing of nodes.  Clear the frame removal listener so we can pass a
-  // NULL RFH here.
-  frame_tree->ClearFrameRemoveListenerForTesting();
-  frame_tree->RemoveFrame(NULL, 555, 655);
+  // Test removing of nodes.
+  frame_tree.RemoveFrame(NULL, 555, 655);
   ASSERT_EQ("5: [14: [244: [], 245: []], "
                 "15: [255 'no children node': []], "
                 "16: [264: [], 265: [], 266: [], "
                      "267 'node with deep subtree': "
                          "[365: [455: [555: []]]], 268: []]]",
-            GetTreeState(frame_tree));
+            GetTreeState(&frame_tree));
 
-  frame_tree->RemoveFrame(NULL, 16, 265);
+  frame_tree.RemoveFrame(NULL, 16, 265);
   ASSERT_EQ("5: [14: [244: [], 245: []], "
                 "15: [255 'no children node': []], "
                 "16: [264: [], 266: [], "
                      "267 'node with deep subtree': "
                          "[365: [455: [555: []]]], 268: []]]",
-            GetTreeState(frame_tree));
+            GetTreeState(&frame_tree));
 
-  frame_tree->RemoveFrame(NULL, 5, 15);
+  frame_tree.RemoveFrame(NULL, 5, 15);
   ASSERT_EQ("5: [14: [244: [], 245: []], "
                 "16: [264: [], 266: [], "
                      "267 'node with deep subtree': "
                          "[365: [455: [555: []]]], 268: []]]",
-            GetTreeState(frame_tree));
+            GetTreeState(&frame_tree));
 }
 
 }  // namespace
 }  // namespace content