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/frame_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 //
 122 // TODO(nick): http://crbug.com/444722 Disabled temporarily because of a bad
 123 // interaction with the WebContentsObserverConsistencyChecker -- calling
 124 // AddFrame directly causes the RFH to not be announced. We either need to
 125 // rewrite this test, or be consistent in the layer at which we announce render
 126 // frame creation.
 127 TEST_F(FrameTreeTest, DISABLED_Shape) {
 128   // Use the FrameTree of the WebContents so that it has all the delegates it
 129   // needs.  We may want to consider a test version of this.
 130   FrameTree* frame_tree = contents()->GetFrameTree();
 131   FrameTreeNode* root = frame_tree->root();
 132
 133   std::string no_children_node("no children node");
 134   std::string deep_subtree("node with deep subtree");
 135   int process_id = root->current_frame_host()->GetProcess()->GetID();
 136
 137   ASSERT_EQ("1: []", GetTreeState(frame_tree));
 138
 139   // Simulate attaching a series of frames to build the frame tree.
 140   frame_tree->AddFrame(root, process_id, 14, std::string());
 141   frame_tree->AddFrame(root, process_id, 15, std::string());
 142   frame_tree->AddFrame(root, process_id, 16, std::string());
 143
 144   frame_tree->AddFrame(root->child_at(0), process_id, 244, std::string());
 145   frame_tree->AddFrame(root->child_at(1), process_id, 255, no_children_node);
 146   frame_tree->AddFrame(root->child_at(0), process_id, 245, std::string());
 147
 148   ASSERT_EQ("1: [14: [244: [], 245: []], "
 149                 "15: [255 'no children node': []], "
 150                 "16: []]",
 151             GetTreeState(frame_tree));
 152
 153   FrameTreeNode* child_16 = root->child_at(2);
 154   frame_tree->AddFrame(child_16, process_id, 264, std::string());
 155   frame_tree->AddFrame(child_16, process_id, 265, std::string());
 156   frame_tree->AddFrame(child_16, process_id, 266, std::string());
 157   frame_tree->AddFrame(child_16, process_id, 267, deep_subtree);
 158   frame_tree->AddFrame(child_16, process_id, 268, std::string());
 159
 160   FrameTreeNode* child_267 = child_16->child_at(3);
 161   frame_tree->AddFrame(child_267, process_id, 365, std::string());
 162   frame_tree->AddFrame(child_267->child_at(0), process_id, 455, std::string());
 163   frame_tree->AddFrame(child_267->child_at(0)->child_at(0), process_id, 555,
 164                        std::string());
 165   frame_tree->AddFrame(child_267->child_at(0)->child_at(0)->child_at(0),
 166                        process_id, 655, std::string());
 167
 168   // Now that's it's fully built, verify the tree structure is as expected.
 169   ASSERT_EQ("1: [14: [244: [], 245: []], "
 170                 "15: [255 'no children node': []], "
 171                 "16: [264: [], 265: [], 266: [], "
 172                      "267 'node with deep subtree': "
 173                          "[365: [455: [555: [655: []]]]], 268: []]]",
 174             GetTreeState(frame_tree));
 175
 176   FrameTreeNode* child_555 = child_267->child_at(0)->child_at(0)->child_at(0);
 177   frame_tree->RemoveFrame(child_555);
 178   ASSERT_EQ("1: [14: [244: [], 245: []], "
 179                 "15: [255 'no children node': []], "
 180                 "16: [264: [], 265: [], 266: [], "
 181                      "267 'node with deep subtree': "
 182                          "[365: [455: []]], 268: []]]",
 183             GetTreeState(frame_tree));
 184
 185   frame_tree->RemoveFrame(child_16->child_at(1));
 186   ASSERT_EQ("1: [14: [244: [], 245: []], "
 187                 "15: [255 'no children node': []], "
 188                 "16: [264: [], 266: [], "
 189                      "267 'node with deep subtree': "
 190                          "[365: [455: []]], 268: []]]",
 191             GetTreeState(frame_tree));
 192
 193   frame_tree->RemoveFrame(root->child_at(1));
 194   ASSERT_EQ("1: [14: [244: [], 245: []], "
 195                 "16: [264: [], 266: [], "
 196                      "267 'node with deep subtree': "
 197                          "[365: [455: []]], 268: []]]",
 198             GetTreeState(frame_tree));
 199 }
 200
 201 // Do some simple manipulations of the frame tree, making sure that
 202 // WebContentsObservers see a consistent view of the tree as we go.
 203 TEST_F(FrameTreeTest, ObserverWalksTreeDuringFrameCreation) {
 204   TreeWalkingWebContentsLogger activity(contents());
 205   FrameTree* frame_tree = contents()->GetFrameTree();
 206   FrameTreeNode* root = frame_tree->root();
 207
 208   EXPECT_EQ("", activity.GetLog());
 209
 210   // Simulate attaching a series of frames to build the frame tree.
 211   main_test_rfh()->OnCreateChildFrame(14, std::string(), SandboxFlags::NONE);
 212   EXPECT_EQ("RenderFrameCreated(14) -> 1: [14: []]", activity.GetLog());
 213   main_test_rfh()->OnCreateChildFrame(18, std::string(), SandboxFlags::NONE);
 214   EXPECT_EQ("RenderFrameCreated(18) -> 1: [14: [], 18: []]", activity.GetLog());
 215   frame_tree->RemoveFrame(root->child_at(0));
 216   EXPECT_EQ("RenderFrameDeleted(14) -> 1: [18: []]", activity.GetLog());
 217   frame_tree->RemoveFrame(root->child_at(0));
 218   EXPECT_EQ("RenderFrameDeleted(18) -> 1: []", activity.GetLog());
 219 }
 220
 221 // Make sure that WebContentsObservers see a consistent view of the tree after
 222 // recovery from a render process crash.
 223 TEST_F(FrameTreeTest, ObserverWalksTreeAfterCrash) {
 224   TreeWalkingWebContentsLogger activity(contents());
 225
 226   main_test_rfh()->OnCreateChildFrame(22, std::string(), SandboxFlags::NONE);
 227   EXPECT_EQ("RenderFrameCreated(22) -> 1: [22: []]", activity.GetLog());
 228   main_test_rfh()->OnCreateChildFrame(23, std::string(), SandboxFlags::NONE);
 229   EXPECT_EQ("RenderFrameCreated(23) -> 1: [22: [], 23: []]", activity.GetLog());
 230
 231   // Crash the renderer
 232   main_rfh()->OnMessageReceived(FrameHostMsg_RenderProcessGone(
 233       0, base::TERMINATION_STATUS_PROCESS_CRASHED, -1));
 234   EXPECT_EQ(
 235       "RenderFrameDeleted(22) -> 1: []\n"
 236       "RenderFrameDeleted(23) -> 1: []\n"
 237       "RenderProcessGone -> 1: []",
 238       activity.GetLog());
 239 }
 240
 241 // Ensure that frames are not added to the tree, if the process passed in
 242 // is different than the process of the parent node.
 243 TEST_F(FrameTreeTest, FailAddFrameWithWrongProcessId) {
 244   FrameTree* frame_tree = contents()->GetFrameTree();
 245   FrameTreeNode* root = frame_tree->root();
 246   int process_id = root->current_frame_host()->GetProcess()->GetID();
 247
 248   ASSERT_EQ("1: []", GetTreeState(frame_tree));
 249
 250   // Simulate attaching a frame from mismatched process id.
 251   ASSERT_FALSE(frame_tree->AddFrame(root, process_id + 1, 1, std::string()));
 252   ASSERT_EQ("1: []", GetTreeState(frame_tree));
 253 }
 254
 255 // Ensure that frames removed while a process has crashed are not preserved in
 256 // the global map of id->frame.
 257 TEST_F(FrameTreeTest, ProcessCrashClearsGlobalMap) {
 258   // Add a couple child frames to the main frame.
 259   FrameTreeNode* root = contents()->GetFrameTree()->root();
 260
 261   main_test_rfh()->OnCreateChildFrame(22, std::string(), SandboxFlags::NONE);
 262   main_test_rfh()->OnCreateChildFrame(23, std::string(), SandboxFlags::NONE);
 263
 264   // Ensure they can be found by id.
 265   int64 id1 = root->child_at(0)->frame_tree_node_id();
 266   int64 id2 = root->child_at(1)->frame_tree_node_id();
 267   EXPECT_TRUE(FrameTree::GloballyFindByID(id1));
 268   EXPECT_TRUE(FrameTree::GloballyFindByID(id2));
 269
 270   // Crash the renderer.
 271   main_test_rfh()->OnMessageReceived(FrameHostMsg_RenderProcessGone(
 272       0, base::TERMINATION_STATUS_PROCESS_CRASHED, -1));
 273
 274   // Ensure they cannot be found by id after the process has crashed.
 275   EXPECT_FALSE(FrameTree::GloballyFindByID(id1));
 276   EXPECT_FALSE(FrameTree::GloballyFindByID(id2));
 277 }
 278
 279 }  // namespace content