PlzNavigate: Add tests to check WebUI navigations.

content/browser/frame_host/render_frame_host_manager_unittest.cc

Index: content/browser/frame_host/render_frame_host_manager_unittest.cc
diff --git a/content/browser/frame_host/render_frame_host_manager_unittest.cc b/content/browser/frame_host/render_frame_host_manager_unittest.cc
index 5c9a75d8a04f3107e488c6b2b1c5724f0523a5c1..1a97d8946b95afd525e1ba862ff6ae8ea3b200f3 100644
--- a/content/browser/frame_host/render_frame_host_manager_unittest.cc
+++ b/content/browser/frame_host/render_frame_host_manager_unittest.cc
@@ -38,6 +38,7 @@
 #include "content/public/test/mock_render_process_host.h"
 #include "content/public/test/test_notification_tracker.h"
 #include "content/public/test/test_utils.h"
+#include "content/test/browser_side_navigation_test_utils.h"
 #include "content/test/test_content_browser_client.h"
 #include "content/test/test_content_client.h"
 #include "content/test/test_render_frame_host.h"
@@ -70,7 +71,8 @@ class RenderFrameHostManagerTestWebUIControllerFactory
     : public WebUIControllerFactory {
  public:
   RenderFrameHostManagerTestWebUIControllerFactory()
-    : should_create_webui_(false) {
+      : should_create_webui_(false), type_(1) {
+    CHECK_NE(reinterpret_cast<WebUI::TypeID>(type_), WebUI::kNoWebUI);
   }
   ~RenderFrameHostManagerTestWebUIControllerFactory() override {}
 
@@ -78,6 +80,17 @@ class RenderFrameHostManagerTestWebUIControllerFactory
     should_create_webui_ = should_create_webui;
   }
 
+  // This method simulates the expectation that different WebUI instance types
+  // would be created. The |type| value will be returned by GetWebUIType casted
+  // to WebUI::TypeID.
+  // As WebUI::TypeID is a typedef to void pointer, factory implementations
+  // return values that they know to be unique to their respective cases. So
+  // values set here should be safe if kept very low (just above zero).
+  void set_webui_type(uintptr_t type) {
+    CHECK_NE(reinterpret_cast<WebUI::TypeID>(type), WebUI::kNoWebUI);
+    type_ = type;
+  }
+
   // WebUIFactory implementation.
   WebUIController* CreateWebUIControllerForURL(WebUI* web_ui,
                                                const GURL& url) const override {
@@ -93,8 +106,7 @@ class RenderFrameHostManagerTestWebUIControllerFactory
     // If WebUI creation is enabled for the test and this is a WebUI URL,
     // returns a mock WebUI type.
     if (should_create_webui_ && HasWebUIScheme(url)) {
-      return const_cast<RenderFrameHostManagerTestWebUIControllerFactory*>(
-          this);
+      return reinterpret_cast<WebUI::TypeID>(type_);
     }
     return WebUI::kNoWebUI;
   }
@@ -111,6 +123,7 @@ class RenderFrameHostManagerTestWebUIControllerFactory
 
  private:
   bool should_create_webui_;
+  uintptr_t type_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostManagerTestWebUIControllerFactory);
 };
@@ -288,6 +301,8 @@ class RenderFrameHostManagerTest : public RenderViewHostImplTestHarness {
     factory_.set_should_create_webui(should_create_webui);
   }
 
+  void set_webui_type(int type) { factory_.set_webui_type(type); }
+
   void NavigateActiveAndCommit(const GURL& url) {
     // Note: we navigate the active RenderFrameHost because previous navigations
     // won't have committed yet, so NavigateAndCommit does the wrong thing
@@ -425,6 +440,13 @@ class RenderFrameHostManagerTest : public RenderViewHostImplTestHarness {
               frame_entry->referrer(), *frame_entry, entry,
               FrameMsg_Navigate_Type::NORMAL, false, base::TimeTicks::Now(),
               static_cast<NavigationControllerImpl*>(&controller()));
+
+      // Simulates request creation that triggers the 1st internal call to
+      // GetFrameHostForNavigation.
+      manager->DidCreateNavigationRequest(*navigation_request);
+
+      // And also simulates the 2nd and final call to GetFrameHostForNavigation
+      // that determines the final frame that will commit the navigation.
       TestRenderFrameHost* frame_host = static_cast<TestRenderFrameHost*>(
           manager->GetFrameHostForNavigation(*navigation_request));
       CHECK(frame_host);
@@ -2657,4 +2679,181 @@ TEST_F(RenderFrameHostManagerTest,
   VerifyPageFocusMessage(hostC->GetProcess(), true, proxy->GetRoutingID());
 }
 
+// Creates a test class for PlzNavigate tests.
+class RenderFrameHostManagerTestWithBrowserSideNavigation
+    : public RenderFrameHostManagerTest {
+ public:
+  void SetUp() override {
+    EnableBrowserSideNavigation();
+    RenderFrameHostManagerTest::SetUp();
+  }
+};
+
+// PlzNavigate: Tests that the correct intermediary and final navigation states
+// are reached when navigating from a renderer that is not live to a WebUI URL.
+TEST_F(RenderFrameHostManagerTestWithBrowserSideNavigation,
+       NavigateFromDeadRendererToWebUI) {
+  set_should_create_webui(true);
+  RenderViewHostChangedObserver change_observer(contents());
+  RenderFrameHostManager* manager = contents()->GetRenderManagerForTesting();
+
+  RenderFrameHostImpl* initial_host = manager->current_frame_host();
+  ASSERT_TRUE(initial_host);
+  EXPECT_FALSE(initial_host->IsRenderFrameLive());
+
+  // Navigation request.
+  const GURL kUrl("chrome://foo");
+  NavigationEntryImpl entry(NULL /* instance */, -1 /* page_id */, kUrl,
+                            Referrer(), base::string16() /* title */,
+                            ui::PAGE_TRANSITION_TYPED,
+                            false /* is_renderer_init */);
+  FrameNavigationEntry* frame_entry = entry.root_node()->frame_entry.get();
+  scoped_ptr<NavigationRequest> navigation_request =
+      NavigationRequest::CreateBrowserInitiated(
+          contents()->GetFrameTree()->root(), frame_entry->url(),
+          frame_entry->referrer(), *frame_entry, entry,
+          FrameMsg_Navigate_Type::NORMAL, false, base::TimeTicks::Now(),
+          static_cast<NavigationControllerImpl*>(&controller()));
+  manager->DidCreateNavigationRequest(*navigation_request);
+
+  // As the initial renderer was not live, the new RenderFrameHost should be
+  // made immediately active at request time.
+  EXPECT_TRUE(change_observer.DidHostChange());
+  EXPECT_FALSE(GetPendingFrameHost(manager));
+  TestRenderFrameHost* host =
+      static_cast<TestRenderFrameHost*>(manager->current_frame_host());
+  ASSERT_TRUE(host);
+  EXPECT_NE(host, initial_host);
+  EXPECT_TRUE(host->IsRenderFrameLive());
+  WebUIImpl* web_ui = host->web_ui();
+  EXPECT_TRUE(web_ui);
+
+  // Prepare to commit, update the navigating RenderFrameHost.
+  EXPECT_EQ(host, manager->GetFrameHostForNavigation(*navigation_request));
+
+  // No pending RenderFrameHost as the current one should be reused.
+  EXPECT_FALSE(GetPendingFrameHost(manager));
+
+  // But there should be a pending WebUI set to re-use the current one.
+  EXPECT_EQ(web_ui, host->web_ui());
+
+  // The RenderFrameHost committed.
+  manager->DidNavigateFrame(host, true);
+  EXPECT_FALSE(change_observer.DidHostChange());
+  EXPECT_EQ(host, manager->current_frame_host());
+  EXPECT_FALSE(GetPendingFrameHost(manager));
+  EXPECT_EQ(web_ui, host->web_ui());
+}
+
+// PlzNavigate: Tests that the correct intermediary and final navigation states
+// are reached when navigating same-site between two WebUIs of the same type.
+TEST_F(RenderFrameHostManagerTestWithBrowserSideNavigation,
+       NavigateSameSiteBetweenWebUIs) {
+  set_should_create_webui(true);
+  NavigateActiveAndCommit(GURL("chrome://foo"));
+
+  RenderFrameHostManager* manager = contents()->GetRenderManagerForTesting();
+  TestRenderFrameHost* host =
+      static_cast<TestRenderFrameHost*>(manager->current_frame_host());
+  EXPECT_TRUE(host->IsRenderFrameLive());
+  WebUIImpl* web_ui = host->web_ui();
+  EXPECT_TRUE(web_ui);
+
+  RenderViewHostChangedObserver change_observer(contents());
+
+  // Navigation request. No change in the returned WebUI type.
+  const GURL kUrl("chrome://foo/bar");
+  NavigationEntryImpl entry(NULL /* instance */, -1 /* page_id */, kUrl,
+                            Referrer(), base::string16() /* title */,
+                            ui::PAGE_TRANSITION_TYPED,
+                            false /* is_renderer_init */);
+  FrameNavigationEntry* frame_entry = entry.root_node()->frame_entry.get();
+  scoped_ptr<NavigationRequest> navigation_request =
+      NavigationRequest::CreateBrowserInitiated(
+          contents()->GetFrameTree()->root(), frame_entry->url(),
+          frame_entry->referrer(), *frame_entry, entry,
+          FrameMsg_Navigate_Type::NORMAL, false, base::TimeTicks::Now(),
+          static_cast<NavigationControllerImpl*>(&controller()));
+  manager->DidCreateNavigationRequest(*navigation_request);
+
+  // The current WebUI should still be in place and there should be a new
+  // pending WebUI instance in the current RenderFrameHost.
+  EXPECT_FALSE(change_observer.DidHostChange());
+  EXPECT_FALSE(GetPendingFrameHost(manager));
+  EXPECT_EQ(web_ui, host->web_ui());
+
+  // Prepare to commit, update the navigating RenderFrameHost.
+  EXPECT_EQ(host, manager->GetFrameHostForNavigation(*navigation_request));
+
+  EXPECT_FALSE(GetPendingFrameHost(manager));
+  EXPECT_EQ(web_ui, host->web_ui());
+
+  // The RenderFrameHost committed.
+  manager->DidNavigateFrame(host, true);
+  EXPECT_FALSE(change_observer.DidHostChange());
+  EXPECT_EQ(web_ui, host->web_ui());
+}
+
+// PlzNavigate: Tests that the correct intermediary and final navigation states
+// are reached when navigating cross-site between two different WebUI types.
+TEST_F(RenderFrameHostManagerTestWithBrowserSideNavigation,
+       NavigateCrossSiteBetweenWebUIs) {
+  // Cross-site navigations will always cause the change of the WebUI instance
+  // but for consistency sake different types will be set for each navigation.
+  set_should_create_webui(true);
+  set_webui_type(1);
+  NavigateActiveAndCommit(GURL("chrome://foo"));
+
+  RenderFrameHostManager* manager = contents()->GetRenderManagerForTesting();
+  TestRenderFrameHost* host =
+      static_cast<TestRenderFrameHost*>(manager->current_frame_host());
+  EXPECT_TRUE(host->IsRenderFrameLive());
+  EXPECT_TRUE(host->web_ui());
+
+  RenderViewHostChangedObserver change_observer(contents());
+  set_webui_type(2);
+
+  // Navigation request.
+  const GURL kUrl("chrome://bar");
+  NavigationEntryImpl entry(NULL /* instance */, -1 /* page_id */, kUrl,
+                            Referrer(), base::string16() /* title */,
+                            ui::PAGE_TRANSITION_TYPED,
+                            false /* is_renderer_init */);
+  FrameNavigationEntry* frame_entry = entry.root_node()->frame_entry.get();
+  scoped_ptr<NavigationRequest> navigation_request =
+      NavigationRequest::CreateBrowserInitiated(
+          contents()->GetFrameTree()->root(), frame_entry->url(),
+          frame_entry->referrer(), *frame_entry, entry,
+          FrameMsg_Navigate_Type::NORMAL, false, base::TimeTicks::Now(),
+          static_cast<NavigationControllerImpl*>(&controller()));
+  manager->DidCreateNavigationRequest(*navigation_request);
+
+  // The current WebUI should still be in place and there should be a new
+  // active WebUI instance in the speculative RenderFrameHost.
+  EXPECT_FALSE(change_observer.DidHostChange());
+  TestRenderFrameHost* speculative_host =
+      static_cast<TestRenderFrameHost*>(GetPendingFrameHost(manager));
+  EXPECT_TRUE(speculative_host);
+  EXPECT_TRUE(manager->current_frame_host()->web_ui());
+  WebUIImpl* next_web_ui = speculative_host->web_ui();
+  EXPECT_TRUE(next_web_ui);
+  EXPECT_NE(next_web_ui, manager->current_frame_host()->web_ui());
+
+  // Prepare to commit, update the navigating RenderFrameHost.
+  EXPECT_EQ(speculative_host,
+            manager->GetFrameHostForNavigation(*navigation_request));
+
+  EXPECT_EQ(speculative_host, GetPendingFrameHost(manager));
+  EXPECT_TRUE(manager->current_frame_host()->web_ui());
+  EXPECT_NE(next_web_ui, manager->current_frame_host()->web_ui());
+  EXPECT_EQ(next_web_ui, speculative_host->web_ui());
+
+  // The RenderFrameHost committed.
+  manager->DidNavigateFrame(speculative_host, true);
+  EXPECT_EQ(speculative_host, manager->current_frame_host());
+  EXPECT_TRUE(change_observer.DidHostChange());
+  EXPECT_EQ(next_web_ui, manager->current_frame_host()->web_ui());
+  EXPECT_FALSE(GetPendingFrameHost(manager));
+}
+
 }  // namespace content