content/browser/frame_host/frame_tree_unittest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/frame_host/frame_tree.h"
   6
   7 #include "base/run_loop.h"
   8 #include "base/strings/string_number_conversions.h"
   9 #include "content/browser/frame_host/navigator_impl.h"
  10 #include "content/browser/frame_host/render_frame_host_factory.h"
  11 #include "content/browser/frame_host/render_frame_host_impl.h"
  12 #include "content/browser/renderer_host/render_view_host_impl.h"
  13 #include "content/browser/web_contents/web_contents_impl.h"
  14 #include "content/common/view_messages.h"
  15 #include "content/public/browser/web_contents_observer.h"
  16 #include "content/public/test/mock_render_process_host.h"
  17 #include "content/public/test/test_browser_context.h"
  18 #include "content/public/test/test_browser_thread_bundle.h"
  19 #include "content/test/test_render_frame_host.h"
  20 #include "content/test/test_render_view_host.h"
  21 #include "content/test/test_web_contents.h"
  22 #include "testing/gtest/include/gtest/gtest.h"
  23
  24 namespace content {
  25
  26 namespace {
  27
  28 // Appends a description of the structure of the frame tree to |result|.
  29 void AppendTreeNodeState(FrameTreeNode* node, std::string* result) {
  30   result->append(
  31       base::Int64ToString(node->current_frame_host()->GetRoutingID()));
  32   if (!node->frame_name().empty()) {
  33     result->append(" '");
  34     result->append(node->frame_name());
  35     result->append("'");
  36   }
  37   result->append(": [");
  38   const char* separator = "";
  39   for (size_t i = 0; i < node->child_count(); i++) {
  40     result->append(separator);
  41     AppendTreeNodeState(node->child_at(i), result);
  42     separator = ", ";
  43   }
  44   result->append("]");
  45 }
  46
  47 // Logs calls to WebContentsObserver along with the state of the frame tree,
  48 // for later use in EXPECT_EQ().
  49 class TreeWalkingWebContentsLogger : public WebContentsObserver {
  50  public:
  51   explicit TreeWalkingWebContentsLogger(WebContents* web_contents)
  52       : WebContentsObserver(web_contents) {}
  53
  54   ~TreeWalkingWebContentsLogger() override {
  55     EXPECT_EQ("", log_) << "Activity logged that was not expected";
  56   }
  57
  58   // Gets and resets the log, which is a string of what happened.
  59   std::string GetLog() {
  60     std::string result = log_;
  61     log_.clear();
  62     return result;
  63   }
  64
  65   // content::WebContentsObserver implementation.
  66   void RenderFrameCreated(RenderFrameHost* render_frame_host) override {
  67     LogWhatHappened("RenderFrameCreated", render_frame_host);
  68   }
  69
  70   void RenderFrameHostChanged(RenderFrameHost* old_host,
  71                               RenderFrameHost* new_host) override {
  72     if (old_host)
  73       LogWhatHappened("RenderFrameChanged(old)", old_host);
  74     LogWhatHappened("RenderFrameChanged(new)", new_host);
  75   }
  76
  77   void RenderFrameDeleted(RenderFrameHost* render_frame_host) override {
  78     LogWhatHappened("RenderFrameDeleted", render_frame_host);
  79   }
  80
  81   void RenderProcessGone(base::TerminationStatus status) override {
  82     LogWhatHappened("RenderProcessGone");
  83   }
  84
  85  private:
  86   void LogWhatHappened(const std::string& event_name) {
  87     if (!log_.empty()) {
  88       log_.append("\n");
  89     }
  90     log_.append(event_name + " -> ");
  91     AppendTreeNodeState(
  92         static_cast<WebContentsImpl*>(web_contents())->GetFrameTree()->root(),
  93         &log_);
  94   }
  95
  96   void LogWhatHappened(const std::string& event_name, RenderFrameHost* rfh) {
  97     LogWhatHappened(
  98         base::StringPrintf("%s(%d)", event_name.c_str(), rfh->GetRoutingID()));
  99   }
 100
 101   std::string log_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(TreeWalkingWebContentsLogger);
 104 };
 105
 106 }  // namespace
 107
 108 class FrameTreeTest : public RenderViewHostImplTestHarness {
 109  protected:
 110   // Prints a FrameTree, for easy assertions of the tree hierarchy.
 111   std::string GetTreeState(FrameTree* frame_tree) {
 112     std::string result;
 113     AppendTreeNodeState(frame_tree->root(), &result);
 114     return result;
 115   }
 116 };
 117
 118 // Exercise tree manipulation routines.
 119 //  - Add a series of nodes and verify tree structure.
 120 //  - Remove a series of nodes and verify tree structure.
 121 TEST_F(FrameTreeTest, Shape) {
 122   // Use the FrameTree of the WebContents so that it has all the delegates it
 123   // needs.  We may want to consider a test version of this.
 124   FrameTree* frame_tree = contents()->GetFrameTree();
 125   FrameTreeNode* root = frame_tree->root();
 126
 127   std::string no_children_node("no children node");
 128   std::string deep_subtree("node with deep subtree");
 129   int process_id = root->current_frame_host()->GetProcess()->GetID();
 130
 131   ASSERT_EQ("1: []", GetTreeState(frame_tree));
 132
 133   // Simulate attaching a series of frames to build the frame tree.
 134   frame_tree->AddFrame(root, process_id, 14, std::string());
 135   frame_tree->AddFrame(root, process_id, 15, std::string());
 136   frame_tree->AddFrame(root, process_id, 16, std::string());
 137
 138   frame_tree->AddFrame(root->child_at(0), process_id, 244, std::string());
 139   frame_tree->AddFrame(root->child_at(1), process_id, 255, no_children_node);
 140   frame_tree->AddFrame(root->child_at(0), process_id, 245, std::string());
 141
 142   ASSERT_EQ("1: [14: [244: [], 245: []], "
 143                 "15: [255 'no children node': []], "
 144                 "16: []]",
 145             GetTreeState(frame_tree));
 146
 147   FrameTreeNode* child_16 = root->child_at(2);
 148   frame_tree->AddFrame(child_16, process_id, 264, std::string());
 149   frame_tree->AddFrame(child_16, process_id, 265, std::string());
 150   frame_tree->AddFrame(child_16, process_id, 266, std::string());
 151   frame_tree->AddFrame(child_16, process_id, 267, deep_subtree);
 152   frame_tree->AddFrame(child_16, process_id, 268, std::string());
 153
 154   FrameTreeNode* child_267 = child_16->child_at(3);
 155   frame_tree->AddFrame(child_267, process_id, 365, std::string());
 156   frame_tree->AddFrame(child_267->child_at(0), process_id, 455, std::string());
 157   frame_tree->AddFrame(child_267->child_at(0)->child_at(0), process_id, 555,
 158                        std::string());
 159   frame_tree->AddFrame(child_267->child_at(0)->child_at(0)->child_at(0),
 160                        process_id, 655, std::string());
 161
 162   // Now that's it's fully built, verify the tree structure is as expected.
 163   ASSERT_EQ("1: [14: [244: [], 245: []], "
 164                 "15: [255 'no children node': []], "
 165                 "16: [264: [], 265: [], 266: [], "
 166                      "267 'node with deep subtree': "
 167                          "[365: [455: [555: [655: []]]]], 268: []]]",
 168             GetTreeState(frame_tree));
 169
 170   FrameTreeNode* child_555 = child_267->child_at(0)->child_at(0)->child_at(0);
 171   frame_tree->RemoveFrame(child_555);
 172   ASSERT_EQ("1: [14: [244: [], 245: []], "
 173                 "15: [255 'no children node': []], "
 174                 "16: [264: [], 265: [], 266: [], "
 175                      "267 'node with deep subtree': "
 176                          "[365: [455: []]], 268: []]]",
 177             GetTreeState(frame_tree));
 178
 179   frame_tree->RemoveFrame(child_16->child_at(1));
 180   ASSERT_EQ("1: [14: [244: [], 245: []], "
 181                 "15: [255 'no children node': []], "
 182                 "16: [264: [], 266: [], "
 183                      "267 'node with deep subtree': "
 184                          "[365: [455: []]], 268: []]]",
 185             GetTreeState(frame_tree));
 186
 187   frame_tree->RemoveFrame(root->child_at(1));
 188   ASSERT_EQ("1: [14: [244: [], 245: []], "
 189                 "16: [264: [], 266: [], "
 190                      "267 'node with deep subtree': "
 191                          "[365: [455: []]], 268: []]]",
 192             GetTreeState(frame_tree));
 193 }
 194
 195 // Do some simple manipulations of the frame tree, making sure that
 196 // WebContentsObservers see a consistent view of the tree as we go.
 197 TEST_F(FrameTreeTest, ObserverWalksTreeDuringFrameCreation) {
 198   TreeWalkingWebContentsLogger activity(contents());
 199   FrameTree* frame_tree = contents()->GetFrameTree();
 200   FrameTreeNode* root = frame_tree->root();
 201
 202   EXPECT_EQ("", activity.GetLog());
 203
 204   // Simulate attaching a series of frames to build the frame tree.
 205   main_test_rfh()->OnCreateChildFrame(14, std::string());
 206   EXPECT_EQ("RenderFrameCreated(14) -> 1: [14: []]", activity.GetLog());
 207   main_test_rfh()->OnCreateChildFrame(18, std::string());
 208   EXPECT_EQ("RenderFrameCreated(18) -> 1: [14: [], 18: []]", activity.GetLog());
 209   frame_tree->RemoveFrame(root->child_at(0));
 210   EXPECT_EQ("RenderFrameDeleted(14) -> 1: [18: []]", activity.GetLog());
 211   frame_tree->RemoveFrame(root->child_at(0));
 212   EXPECT_EQ("RenderFrameDeleted(18) -> 1: []", activity.GetLog());
 213 }
 214
 215 // Make sure that WebContentsObservers see a consistent view of the tree after
 216 // recovery from a render process crash.
 217 TEST_F(FrameTreeTest, ObserverWalksTreeAfterCrash) {
 218   TreeWalkingWebContentsLogger activity(contents());
 219
 220   main_test_rfh()->OnCreateChildFrame(22, std::string());
 221   EXPECT_EQ("RenderFrameCreated(22) -> 1: [22: []]", activity.GetLog());
 222   main_test_rfh()->OnCreateChildFrame(23, std::string());
 223   EXPECT_EQ("RenderFrameCreated(23) -> 1: [22: [], 23: []]", activity.GetLog());
 224
 225   // Crash the renderer
 226   test_rvh()->OnMessageReceived(ViewHostMsg_RenderProcessGone(
 227       0, base::TERMINATION_STATUS_PROCESS_CRASHED, -1));
 228   EXPECT_EQ(
 229       "RenderFrameDeleted(22) -> 1: []\n"
 230       "RenderFrameDeleted(23) -> 1: []\n"
 231       "RenderProcessGone -> 1: []",
 232       activity.GetLog());
 233 }
 234
 235 // Ensure that frames are not added to the tree, if the process passed in
 236 // is different than the process of the parent node.
 237 TEST_F(FrameTreeTest, FailAddFrameWithWrongProcessId) {
 238   FrameTree* frame_tree = contents()->GetFrameTree();
 239   FrameTreeNode* root = frame_tree->root();
 240   int process_id = root->current_frame_host()->GetProcess()->GetID();
 241
 242   ASSERT_EQ("1: []", GetTreeState(frame_tree));
 243
 244   // Simulate attaching a frame from mismatched process id.
 245   ASSERT_FALSE(frame_tree->AddFrame(root, process_id + 1, 1, std::string()));
 246   ASSERT_EQ("1: []", GetTreeState(frame_tree));
 247 }
 248
 249 }  // namespace content