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// Copyright (c) 2010 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/browser_thread.h"
#include "chrome/browser/prerender/prerender_contents.h"
#include "chrome/browser/prerender/prerender_manager.h"
#include "googleurl/src/gurl.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
class DummyPrerenderContents : public PrerenderContents {
public:
DummyPrerenderContents(PrerenderManager* prerender_manager,
const GURL& url,
FinalStatus expected_final_status)
: PrerenderContents(prerender_manager, NULL, url,
std::vector<GURL>()),
has_started_(false),
expected_final_status_(expected_final_status) {
}
DummyPrerenderContents(PrerenderManager* prerender_manager,
const GURL& url,
const std::vector<GURL> alias_urls,
FinalStatus expected_final_status)
: PrerenderContents(prerender_manager, NULL, url, alias_urls),
has_started_(false),
expected_final_status_(expected_final_status) {
}
virtual ~DummyPrerenderContents() {
EXPECT_EQ(expected_final_status_, final_status());
}
virtual void StartPrerendering() {
has_started_ = true;
}
bool has_started() const { return has_started_; }
private:
bool has_started_;
FinalStatus expected_final_status_;
};
class TestPrerenderManager : public PrerenderManager {
public:
TestPrerenderManager()
: PrerenderManager(NULL),
time_(base::Time::Now()),
next_pc_(NULL) {
}
void AdvanceTime(base::TimeDelta delta) {
time_ += delta;
}
void SetNextPrerenderContents(PrerenderContents* pc) {
next_pc_.reset(pc);
}
// Shorthand to add a simple preload with no aliases.
void AddSimplePreload(const GURL& url) {
AddPreload(url, std::vector<GURL>());
}
PrerenderContents* next_pc() { return next_pc_.get(); }
protected:
virtual ~TestPrerenderManager() {
if (next_pc()) {
next_pc()->set_final_status(
PrerenderContents::FINAL_STATUS_MANAGER_SHUTDOWN);
}
}
private:
virtual base::Time GetCurrentTime() const {
return time_;
}
virtual PrerenderContents* CreatePrerenderContents(
const GURL& url,
const std::vector<GURL>& alias_urls) {
return next_pc_.release();
}
base::Time time_;
scoped_ptr<PrerenderContents> next_pc_;
};
} // namespace
class PrerenderManagerTest : public testing::Test {
public:
PrerenderManagerTest() : prerender_manager_(new TestPrerenderManager()),
ui_thread_(BrowserThread::UI, &message_loop_) {
}
protected:
scoped_refptr<TestPrerenderManager> prerender_manager_;
private:
// Needed to pass PrerenderManager's DCHECKs.
MessageLoop message_loop_;
BrowserThread ui_thread_;
};
TEST_F(PrerenderManagerTest, EmptyTest) {
GURL url("http://www.google.com/");
EXPECT_FALSE(prerender_manager_->MaybeUsePreloadedPage(NULL, url));
}
TEST_F(PrerenderManagerTest, FoundTest) {
GURL url("http://www.google.com/");
DummyPrerenderContents* pc =
new DummyPrerenderContents(prerender_manager_.get(),
url,
PrerenderContents::FINAL_STATUS_USED);
prerender_manager_->SetNextPrerenderContents(pc);
prerender_manager_->AddSimplePreload(url);
EXPECT_TRUE(pc->has_started());
EXPECT_EQ(pc, prerender_manager_->GetEntry(url));
pc->set_final_status(PrerenderContents::FINAL_STATUS_USED);
delete pc;
}
// Make sure that if queue a request, and a second prerender request for the
// same URL comes in, that we drop the second request and keep the first one.
TEST_F(PrerenderManagerTest, DropSecondRequestTest) {
GURL url("http://www.google.com/");
DummyPrerenderContents* pc =
new DummyPrerenderContents(prerender_manager_.get(), url,
PrerenderContents::FINAL_STATUS_USED);
DummyPrerenderContents* null = NULL;
prerender_manager_->SetNextPrerenderContents(pc);
prerender_manager_->AddSimplePreload(url);
EXPECT_EQ(null, prerender_manager_->next_pc());
EXPECT_TRUE(pc->has_started());
DummyPrerenderContents* pc1 =
new DummyPrerenderContents(
prerender_manager_.get(), url,
PrerenderContents::FINAL_STATUS_MANAGER_SHUTDOWN);
prerender_manager_->SetNextPrerenderContents(pc1);
prerender_manager_->AddSimplePreload(url);
EXPECT_EQ(pc1, prerender_manager_->next_pc());
EXPECT_FALSE(pc1->has_started());
EXPECT_EQ(pc, prerender_manager_->GetEntry(url));
pc->set_final_status(PrerenderContents::FINAL_STATUS_USED);
delete pc;
}
// Ensure that we expire a prerendered page after the max. permitted time.
TEST_F(PrerenderManagerTest, ExpireTest) {
GURL url("http://www.google.com/");
DummyPrerenderContents* pc =
new DummyPrerenderContents(prerender_manager_.get(), url,
PrerenderContents::FINAL_STATUS_TIMED_OUT);
DummyPrerenderContents* null = NULL;
prerender_manager_->SetNextPrerenderContents(pc);
prerender_manager_->AddSimplePreload(url);
EXPECT_EQ(null, prerender_manager_->next_pc());
EXPECT_TRUE(pc->has_started());
prerender_manager_->AdvanceTime(prerender_manager_->max_prerender_age()
+ base::TimeDelta::FromSeconds(1));
EXPECT_EQ(null, prerender_manager_->GetEntry(url));
}
// LRU Test. Make sure that if we prerender more than one request, that
// the oldest one will be dropped.
TEST_F(PrerenderManagerTest, DropOldestRequestTest) {
GURL url("http://www.google.com/");
DummyPrerenderContents* pc =
new DummyPrerenderContents(prerender_manager_.get(), url,
PrerenderContents::FINAL_STATUS_EVICTED);
DummyPrerenderContents* null = NULL;
prerender_manager_->SetNextPrerenderContents(pc);
prerender_manager_->AddSimplePreload(url);
EXPECT_EQ(null, prerender_manager_->next_pc());
EXPECT_TRUE(pc->has_started());
GURL url1("http://news.google.com/");
DummyPrerenderContents* pc1 =
new DummyPrerenderContents(prerender_manager_.get(), url1,
PrerenderContents::FINAL_STATUS_USED);
prerender_manager_->SetNextPrerenderContents(pc1);
prerender_manager_->AddSimplePreload(url1);
EXPECT_EQ(null, prerender_manager_->next_pc());
EXPECT_TRUE(pc1->has_started());
EXPECT_EQ(null, prerender_manager_->GetEntry(url));
EXPECT_EQ(pc1, prerender_manager_->GetEntry(url1));
pc1->set_final_status(PrerenderContents::FINAL_STATUS_USED);
delete pc1;
}
// Two element prerender test. Ensure that the LRU operates correctly if we
// permit 2 elements to be kept prerendered.
TEST_F(PrerenderManagerTest, TwoElementPrerenderTest) {
prerender_manager_->set_max_elements(2);
GURL url("http://www.google.com/");
DummyPrerenderContents* pc =
new DummyPrerenderContents(prerender_manager_.get(), url,
PrerenderContents::FINAL_STATUS_EVICTED);
DummyPrerenderContents* null = NULL;
prerender_manager_->SetNextPrerenderContents(pc);
prerender_manager_->AddSimplePreload(url);
EXPECT_EQ(null, prerender_manager_->next_pc());
EXPECT_TRUE(pc->has_started());
GURL url1("http://news.google.com/");
DummyPrerenderContents* pc1 =
new DummyPrerenderContents(prerender_manager_.get(), url1,
PrerenderContents::FINAL_STATUS_USED);
prerender_manager_->SetNextPrerenderContents(pc1);
prerender_manager_->AddSimplePreload(url1);
EXPECT_EQ(null, prerender_manager_->next_pc());
EXPECT_TRUE(pc1->has_started());
GURL url2("http://images.google.com/");
DummyPrerenderContents* pc2 =
new DummyPrerenderContents(prerender_manager_.get(), url2,
PrerenderContents::FINAL_STATUS_USED);
prerender_manager_->SetNextPrerenderContents(pc2);
prerender_manager_->AddSimplePreload(url2);
EXPECT_EQ(null, prerender_manager_->next_pc());
EXPECT_TRUE(pc2->has_started());
EXPECT_EQ(null, prerender_manager_->GetEntry(url));
EXPECT_EQ(pc1, prerender_manager_->GetEntry(url1));
EXPECT_EQ(pc2, prerender_manager_->GetEntry(url2));
pc1->set_final_status(PrerenderContents::FINAL_STATUS_USED);
delete pc1;
pc2->set_final_status(PrerenderContents::FINAL_STATUS_USED);
delete pc2;
}
TEST_F(PrerenderManagerTest, AliasURLTest) {
GURL url("http://www.google.com/");
GURL alias_url1("http://www.google.com/index.html");
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,
PrerenderContents::FINAL_STATUS_USED);
prerender_manager_->SetNextPrerenderContents(pc);
prerender_manager_->AddSimplePreload(url);
EXPECT_EQ(NULL, prerender_manager_->GetEntry(not_an_alias_url));
EXPECT_EQ(pc, prerender_manager_->GetEntry(alias_url1));
prerender_manager_->SetNextPrerenderContents(pc);
prerender_manager_->AddSimplePreload(url);
EXPECT_EQ(pc, prerender_manager_->GetEntry(alias_url2));
prerender_manager_->SetNextPrerenderContents(pc);
prerender_manager_->AddSimplePreload(url);
EXPECT_EQ(pc, prerender_manager_->GetEntry(url));
pc->set_final_status(PrerenderContents::FINAL_STATUS_USED);
delete pc;
}
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