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// Copyright 2020 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 <memory>
#include "base/run_loop.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/threading/platform_thread.h"
#include "build/build_config.h"
#include "components/prerender/browser/prerender_histograms.h"
#include "components/prerender/browser/prerender_manager.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/url_loader_monitor.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "net/test/embedded_test_server/http_request.h"
#include "net/test/embedded_test_server/http_response.h"
#include "services/network/public/cpp/resource_request.h"
#include "weblayer/browser/no_state_prefetch/prerender_link_manager_factory.h"
#include "weblayer/browser/no_state_prefetch/prerender_manager_factory.h"
#include "weblayer/browser/profile_impl.h"
#include "weblayer/browser/tab_impl.h"
#include "weblayer/public/prerender_controller.h"
#include "weblayer/shell/browser/shell.h"
#include "weblayer/test/weblayer_browser_test.h"
#include "weblayer/test/weblayer_browser_test_utils.h"
#if defined(OS_ANDROID)
#include "components/ukm/test_ukm_recorder.h"
#include "services/metrics/public/cpp/ukm_builders.h"
#include "weblayer/browser/android/metrics/metrics_test_helper.h"
#endif
namespace weblayer {
class NoStatePrefetchBrowserTest : public WebLayerBrowserTest {
public:
#if defined(OS_ANDROID)
void SetUp() override {
InstallTestGmsBridge(/* user_consent= */ true);
WebLayerBrowserTest::SetUp();
}
void TearDown() override {
RemoveTestGmsBridge();
WebLayerBrowserTest::TearDown();
}
#endif
void SetUpOnMainThread() override {
prerendered_page_fetched_ = std::make_unique<base::RunLoop>();
script_resource_fetched_ = std::make_unique<base::RunLoop>();
https_server_ = std::make_unique<net::EmbeddedTestServer>(
net::EmbeddedTestServer::TYPE_HTTPS);
https_server_->RegisterRequestHandler(base::BindRepeating(
&NoStatePrefetchBrowserTest::HandleRequest, base::Unretained(this)));
https_server_->AddDefaultHandlers(
base::FilePath(FILE_PATH_LITERAL("weblayer/test/data")));
ASSERT_TRUE(https_server_->Start());
#if defined(OS_ANDROID)
ukm_recorder_ = std::make_unique<ukm::TestAutoSetUkmRecorder>();
#endif
}
// Helper methods.
std::unique_ptr<net::test_server::HttpResponse> HandleRequest(
const net::test_server::HttpRequest& request) {
if (request.GetURL().path().find("prerendered_page") != std::string::npos) {
prerendered_page_fetched_->Quit();
prerendered_page_was_fetched_ = true;
}
if (request.GetURL().path().find("prefetch.js") != std::string::npos) {
script_fetched_ = true;
auto iter = request.headers.find("Purpose");
purpose_header_value_ = iter->second;
script_resource_fetched_->Quit();
}
if (request.GetURL().path().find("prefetch_meta.js") != std::string::npos) {
script_executed_ = true;
}
// The default handlers will take care of this request.
return nullptr;
}
void NavigateToPageAndWaitForTitleChange(const GURL& navigate_to,
base::string16 expected_title) {
content::TitleWatcher title_watcher(
static_cast<TabImpl*>(shell()->tab())->web_contents(), expected_title);
NavigateAndWaitForCompletion(navigate_to, shell());
ASSERT_TRUE(expected_title == title_watcher.WaitAndGetTitle());
}
protected:
content::BrowserContext* GetBrowserContext() {
Tab* tab = shell()->tab();
TabImpl* tab_impl = static_cast<TabImpl*>(tab);
return tab_impl->web_contents()->GetBrowserContext();
}
std::unique_ptr<base::RunLoop> prerendered_page_fetched_;
std::unique_ptr<base::RunLoop> script_resource_fetched_;
bool prerendered_page_was_fetched_ = false;
bool script_fetched_ = false;
bool script_executed_ = false;
std::string purpose_header_value_;
std::unique_ptr<net::EmbeddedTestServer> https_server_;
#if defined(OS_ANDROID)
std::unique_ptr<ukm::TestAutoSetUkmRecorder> ukm_recorder_;
#endif
};
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest, CreatePrerenderManager) {
auto* prerender_manager =
PrerenderManagerFactory::GetForBrowserContext(GetBrowserContext());
EXPECT_TRUE(prerender_manager);
}
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest, CreatePrerenderLinkManager) {
auto* prerender_link_manager =
PrerenderLinkManagerFactory::GetForBrowserContext(GetBrowserContext());
EXPECT_TRUE(prerender_link_manager);
}
// Test that adding a link-rel prerender tag causes a fetch.
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest,
LinkRelPrerenderPageFetched) {
NavigateAndWaitForCompletion(GURL(https_server_->GetURL("/parent_page.html")),
shell());
prerendered_page_fetched_->Run();
}
// Test that only render blocking resources are loaded during NoStatePrefetch.
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest,
NSPLoadsRenderBlockingResource) {
NavigateAndWaitForCompletion(GURL(https_server_->GetURL("/parent_page.html")),
shell());
script_resource_fetched_->Run();
EXPECT_EQ("prefetch", purpose_header_value_);
EXPECT_FALSE(script_executed_);
}
// Test that navigating to a no-state-prefetched page executes JS and reuses
// prerendered resources.
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest, NavigateToPrerenderedPage) {
NavigateAndWaitForCompletion(GURL(https_server_->GetURL("/parent_page.html")),
shell());
script_resource_fetched_->Run();
// Navigate to the prerendered page and wait for its title to change.
script_fetched_ = false;
NavigateToPageAndWaitForTitleChange(
GURL(https_server_->GetURL("/prerendered_page.html")),
base::ASCIIToUTF16("Prefetch Page"));
EXPECT_FALSE(script_fetched_);
EXPECT_TRUE(script_executed_);
}
#if defined(OS_ANDROID)
// Test that no-state-prefetch results in UKM getting recorded.
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest, UKMRecorded) {
GetProfile()->SetBooleanSetting(SettingType::UKM_ENABLED, true);
NavigateAndWaitForCompletion(GURL(https_server_->GetURL("/parent_page.html")),
shell());
script_resource_fetched_->Run();
NavigateToPageAndWaitForTitleChange(
GURL(https_server_->GetURL("/prerendered_page.html")),
base::ASCIIToUTF16("Prefetch Page"));
auto entries = ukm_recorder_->GetEntriesByName(
ukm::builders::NoStatePrefetch::kEntryName);
ASSERT_EQ(entries.size(), 1u);
const auto* entry = entries[0];
// FinalStatus must be set to FINAL_STATUS_NOSTATE_PREFETCH_FINISHED.
ukm_recorder_->ExpectEntryMetric(
entry,
ukm::builders::NoStatePrefetch::kPrefetchedRecently_FinalStatusName, 56);
// Origin must be set to ORIGIN_LINK_REL_PRERENDER_SAMEDOMAIN.
ukm_recorder_->ExpectEntryMetric(
entry, ukm::builders::NoStatePrefetch::kPrefetchedRecently_OriginName, 7);
}
#endif
// link-rel="prerender" happens even when NoStatePrefetch has been disabled.
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest,
LinkRelPrerenderWithNSPDisabled) {
GetProfile()->SetBooleanSetting(SettingType::NETWORK_PREDICTION_ENABLED,
false);
NavigateAndWaitForCompletion(GURL(https_server_->GetURL("/parent_page.html")),
shell());
prerendered_page_fetched_->Run();
}
// link-rel="next" happens even when NoStatePrefetch has been disabled.
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest, LinkRelNextWithNSPDisabled) {
GetProfile()->SetBooleanSetting(SettingType::NETWORK_PREDICTION_ENABLED,
false);
NavigateAndWaitForCompletion(
GURL(https_server_->GetURL("/link_rel_next_parent.html")), shell());
prerendered_page_fetched_->Run();
}
// Non-web initiated prerender succeeds and subsequent navigations reuse
// previously downloaded resources.
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest, ExternalPrerender) {
// std::unique_ptr<PrerenderControllerImpl> controller =
// PrerenderControllerImpl::Create(shell()->browser());
GetProfile()->GetPrerenderController()->Prerender(
GURL(https_server_->GetURL("/prerendered_page.html")));
script_resource_fetched_->Run();
// Navigate to the prerendered page and wait for its title to change.
script_fetched_ = false;
NavigateToPageAndWaitForTitleChange(
GURL(https_server_->GetURL("/prerendered_page.html")),
base::ASCIIToUTF16("Prefetch Page"));
EXPECT_FALSE(script_fetched_);
}
// Non-web initiated prerender fails when the user has opted out.
IN_PROC_BROWSER_TEST_F(NoStatePrefetchBrowserTest,
ExternalPrerenderWhenOptedOut) {
GetProfile()->SetBooleanSetting(SettingType::NETWORK_PREDICTION_ENABLED,
false);
GetProfile()->GetPrerenderController()->Prerender(
GURL(https_server_->GetURL("/prerendered_page.html")));
base::RunLoop().RunUntilIdle();
EXPECT_FALSE(prerendered_page_was_fetched_);
}
} // namespace weblayer
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