Give prerendering RVH's RenderWidgetHostViews.

chrome/browser/prerender/prerender_manager_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 "base/time.h"
 #include "chrome/browser/prerender/prerender_contents.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_process_host.h"
@@ skipping 21 matching lines @@
                          FinalStatus expected_final_status)
       : PrerenderContents(prerender_manager, NULL, url, alias_urls, GURL()),
         has_started_(false),
         expected_final_status_(expected_final_status) {
   }
 
   virtual ~DummyPrerenderContents() {
     EXPECT_EQ(expected_final_status_, final_status());
   }
 
-  virtual void StartPrerendering() OVERRIDE {
+  virtual void StartPrerendering(
+      const RenderViewHost* source_render_view_host) OVERRIDE {
     has_started_ = true;
   }
 
   virtual bool GetChildId(int* child_id) const OVERRIDE {
     *child_id = 0;
     return true;
   }
 
   virtual bool GetRouteId(int* route_id) const OVERRIDE {
     *route_id = 0;
@@ skipping 24 matching lines @@
   void AdvanceTimeTicks(base::TimeDelta delta) {
     time_ticks_ += delta;
   }
 
   void SetNextPrerenderContents(PrerenderContents* pc) {
     next_pc_.reset(pc);
   }
 
   // Shorthand to add a simple preload with no aliases.
   bool AddSimplePreload(const GURL& url) {
-    return AddPreload(url, std::vector<GURL>(), GURL());
+    return AddPreload(std::pair<int, int>(-1, -1), url, std::vector<GURL>(),
+                      GURL());
   }
 
   bool IsPendingEntry(const GURL& url) {
     return (PrerenderManager::FindPendingEntry(url) != NULL);
   }
 
   void set_rate_limit_enabled(bool enabled) { rate_limit_enabled_ = true; }
 
+  // Shorthand to add a simple preload with aliases.
+  bool AddSimplePreloadWithAliases(const GURL& url,
+                                   const std::vector<GURL>& alias_urls) {
+    return AddPreload(std::pair<int, int>(-1, -1), url, alias_urls, GURL());
+  }
+
   PrerenderContents* next_pc() { return next_pc_.get(); }
 
  protected:
   virtual ~TestPrerenderManager() {
     if (next_pc()) {
       next_pc()->set_final_status(
           FINAL_STATUS_MANAGER_SHUTDOWN);
     }
   }
 
@@ skipping 166 matching lines @@
   GURL alias_url2("http://google.com/");
   GURL not_an_alias_url("http://google.com/index.html");
   std::vector<GURL> alias_urls;
   alias_urls.push_back(alias_url1);
   alias_urls.push_back(alias_url2);
   DummyPrerenderContents* pc =
       new DummyPrerenderContents(prerender_manager_.get(), url, alias_urls,
                                  FINAL_STATUS_USED);
   // Test that all of the aliases work, but nont_an_alias_url does not.
   prerender_manager_->SetNextPrerenderContents(pc);
-  EXPECT_TRUE(prerender_manager_->AddPreload(url, alias_urls, GURL()));
+  EXPECT_TRUE(prerender_manager_->AddSimplePreloadWithAliases(url, alias_urls));
   ASSERT_EQ(NULL, prerender_manager_->GetEntry(not_an_alias_url));
   ASSERT_EQ(pc, prerender_manager_->GetEntry(alias_url1));
   prerender_manager_->SetNextPrerenderContents(pc);
-  EXPECT_TRUE(prerender_manager_->AddPreload(url, alias_urls, GURL()));
+  EXPECT_TRUE(prerender_manager_->AddSimplePreloadWithAliases(url, alias_urls));
   ASSERT_EQ(pc, prerender_manager_->GetEntry(alias_url2));
   prerender_manager_->SetNextPrerenderContents(pc);
-  EXPECT_TRUE(prerender_manager_->AddPreload(url, alias_urls, GURL()));
+  EXPECT_TRUE(prerender_manager_->AddSimplePreloadWithAliases(url, alias_urls));
   ASSERT_EQ(pc, prerender_manager_->GetEntry(url));
 
   // Test that alias URLs can not be added.
   prerender_manager_->SetNextPrerenderContents(pc);
-  EXPECT_TRUE(prerender_manager_->AddPreload(url, alias_urls, GURL()));
+  EXPECT_TRUE(prerender_manager_->AddSimplePreloadWithAliases(url, alias_urls));
   EXPECT_FALSE(prerender_manager_->AddSimplePreload(url));
   EXPECT_FALSE(prerender_manager_->AddSimplePreload(alias_url1));
   EXPECT_FALSE(prerender_manager_->AddSimplePreload(alias_url2));
   ASSERT_EQ(pc, prerender_manager_->GetEntry(url));
 
   pc->set_final_status(FINAL_STATUS_USED);
   delete pc;
 }
 
 // Ensure that we ignore prerender requests within the rate limit.
@@ skipping 114 matching lines @@
   EXPECT_FALSE(PrerenderManager::MaybeGetQueryStringBasedAliasURL(
       GURL("http://www.google.com/url?sadf=test&blah=blahblahblah"), &result));
   EXPECT_FALSE(PrerenderManager::MaybeGetQueryStringBasedAliasURL(
       GURL("http://www.google.com/?url=INVALIDurlsAREsoMUCHfun.com"), &result));
   EXPECT_TRUE(PrerenderManager::MaybeGetQueryStringBasedAliasURL(
       GURL("http://www.google.com/?url=http://validURLSareGREAT.com"),
       &result));
   ASSERT_EQ(GURL("http://validURLSareGREAT.com").spec(), result.spec());
 }
 
+// Ensure an entry with a |pending_final_status| is not returned.
+TEST_F(PrerenderManagerTest, DropEntriesWithPendingFinalStatus) {
+  GURL url("http://www.google.com/");
+  DummyPrerenderContents* pc =
+      new DummyPrerenderContents(prerender_manager_.get(), url,
+                                 FINAL_STATUS_COMPOSITING);
+  DummyPrerenderContents* null = NULL;
+  prerender_manager_->SetNextPrerenderContents(pc);
+  EXPECT_TRUE(prerender_manager_->AddSimplePreload(url));
+  EXPECT_EQ(null, prerender_manager_->next_pc());
+  EXPECT_TRUE(pc->has_started());
+  pc->set_pending_final_status(FINAL_STATUS_COMPOSITING);
+  ASSERT_EQ(null, prerender_manager_->GetEntry(url));
+}
+
+// Adds 2 entries, sets the |pending_final_status| of the second one, and checks
+// that adding a third entry removes the second rather than the first.
+TEST_F(PrerenderManagerTest, DropSecondEntryWithPendingFinalStatus) {
+  prerender_manager_->set_max_elements(2);
+  GURL url1("http://www.google.com/");
+  DummyPrerenderContents* pc1 =
+      new DummyPrerenderContents(prerender_manager_.get(), url1,
+                                 FINAL_STATUS_USED);
+  DummyPrerenderContents* null = NULL;
+  prerender_manager_->SetNextPrerenderContents(pc1);
+  EXPECT_TRUE(prerender_manager_->AddSimplePreload(url1));
+  EXPECT_EQ(null, prerender_manager_->next_pc());
+  EXPECT_TRUE(pc1->has_started());
+  GURL url2("http://news.google.com/");
+  DummyPrerenderContents* pc2 =
+      new DummyPrerenderContents(prerender_manager_.get(),  url1,
+                                 FINAL_STATUS_COMPOSITING);
+  prerender_manager_->SetNextPrerenderContents(pc2);
+  EXPECT_TRUE(prerender_manager_->AddSimplePreload(url2));
+  EXPECT_EQ(null, prerender_manager_->next_pc());
+  EXPECT_TRUE(pc2->has_started());
+  pc2->set_pending_final_status(FINAL_STATUS_COMPOSITING);
+  GURL url3("http://images.google.com/");
+  DummyPrerenderContents* pc3 =
+      new DummyPrerenderContents(prerender_manager_.get(), url3,
+                                 FINAL_STATUS_USED);
+  prerender_manager_->SetNextPrerenderContents(pc3);
+  EXPECT_TRUE(prerender_manager_->AddSimplePreload(url3));
+  EXPECT_EQ(null, prerender_manager_->next_pc());
+  EXPECT_TRUE(pc2->has_started());
+  ASSERT_EQ(pc1, prerender_manager_->GetEntry(url1));
+  ASSERT_EQ(null, prerender_manager_->GetEntry(url2));
+  ASSERT_EQ(pc3, prerender_manager_->GetEntry(url3));
+  pc1->set_final_status(FINAL_STATUS_USED);
+  delete pc1;

[Paweł Hajdan Jr., 2011/04/20 06:49:37]

Could you switch the pointers to scoped_ptrs instead? You can still .reset()
such a pointer, but handling resources manually in tests is a known source of
memory leaks.

[mmenke, 2011/04/20 15:15:19]

Done.  Reworked these tests slightly, to avoid simply removing the deletes and
adding resets() for all non-used entries, which wouldn't really fix anything,
since an extra reset() and missing delete would be pretty much equivalent.

+  pc3->set_final_status(FINAL_STATUS_USED);
+  delete pc3;
+}
+
+// Tests that prerendering is cancelled when the source render view does not
+// exist.  On failure, the DCHECK in CreatePrerenderContents() above should be
+// triggered.
+TEST_F(PrerenderManagerTest, SourceRenderViewClosed) {
+  GURL url("http://www.google.com/");
+  EXPECT_FALSE(prerender_manager_->AddPreload(
+      std::pair<int, int>(100, 100), url, std::vector<GURL>(), GURL()));
+}
+
 }  // namespace prerender