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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 "base/test/scoped_feature_list.h"
#include "content/browser/prerender/prerender_host_registry.h"
#include "content/browser/storage_partition_impl.h"
#include "content/public/browser/browser_context.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/public/test/test_navigation_observer.h"
#include "content/shell/browser/shell.h"
#include "net/dns/mock_host_resolver.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "net/test/embedded_test_server/http_request.h"
#include "third_party/blink/public/common/features.h"
namespace content {
namespace {
class PrerenderBrowserTest : public ContentBrowserTest {
public:
PrerenderBrowserTest() {
feature_list_.InitAndEnableFeature(blink::features::kPrerender2);
}
~PrerenderBrowserTest() override = default;
void SetUpOnMainThread() override {
host_resolver()->AddRule("*", "127.0.0.1");
ssl_server_.AddDefaultHandlers(GetTestDataFilePath());
ssl_server_.SetSSLConfig(
net::test_server::EmbeddedTestServer::CERT_TEST_NAMES);
ssl_server_.RegisterRequestMonitor(base::BindRepeating(
&PrerenderBrowserTest::MonitorResourceRequest, base::Unretained(this)));
ASSERT_TRUE(ssl_server_.Start());
}
void TearDownOnMainThread() override {
EXPECT_TRUE(ssl_server_.ShutdownAndWaitUntilComplete());
}
void MonitorResourceRequest(const net::test_server::HttpRequest& request) {
request_count_by_path_[request.GetURL().PathForRequest()]++;
}
PrerenderHostRegistry& GetPrerenderHostRegistry() {
auto* storage_partition = static_cast<StoragePartitionImpl*>(
BrowserContext::GetDefaultStoragePartition(
shell()->web_contents()->GetBrowserContext()));
return *storage_partition->GetPrerenderHostRegistry();
}
GURL GetUrl(const std::string& path) {
return ssl_server_.GetURL("a.test", path);
}
int GetRequestCount(const GURL& url) {
return request_count_by_path_[url.PathForRequest()];
}
private:
net::test_server::EmbeddedTestServer ssl_server_{
net::test_server::EmbeddedTestServer::TYPE_HTTPS};
// Counts of requests sent to the server. Keyed by path (not by full URL)
// because the host part of the requests is translated ("a.test" to
// "127.0.0.1") before the server handles them.
std::map<std::string, int> request_count_by_path_;
base::test::ScopedFeatureList feature_list_;
};
// Disabled flaky test. https://crbug.com/1156141
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest, DISABLED_LinkRelPrerender) {
const GURL kInitialUrl = GetUrl("/prerender/single_prerender.html");
const GURL kPrerenderingUrl = GetUrl("/empty.html");
// Start watching new web contents to be created for prerendering.
content::TestNavigationObserver navigation_observer(kPrerenderingUrl);
navigation_observer.StartWatchingNewWebContents();
// Navigate to a page that initiates prerendering for `kPrerenderingUrl`.
ASSERT_TRUE(NavigateToURL(shell(), kInitialUrl));
// Wait until the completion of prerendering.
navigation_observer.Wait();
// A request should be issued for `kPrerenderingUrl`.
EXPECT_EQ(GetRequestCount(kPrerenderingUrl), 1);
// PrerenderHost for `kPrerenderingUrl` should be registered in
// PrerenderHostRegistry.
PrerenderHostRegistry& registry = GetPrerenderHostRegistry();
EXPECT_NE(registry.FindHostByUrlForTesting(kPrerenderingUrl), nullptr);
// Activate the prerendered page. NavigateToURL() is not available here
// because the helper accesses the predecessor WebContents but it is destroyed
// during activation.
EXPECT_EQ(shell()->web_contents()->GetURL(), kInitialUrl);
content::TestNavigationObserver activation_observer(shell()->web_contents());
EXPECT_TRUE(ExecJs(shell()->web_contents(),
JsReplace("location = $1", kPrerenderingUrl)));
activation_observer.Wait();
EXPECT_EQ(shell()->web_contents()->GetURL(), kPrerenderingUrl);
// PrerenderHost for `kPrerenderingUrl` should be consumed.
EXPECT_EQ(registry.FindHostByUrlForTesting(kPrerenderingUrl), nullptr);
// Activating the prerendered page should not issue a request.
EXPECT_EQ(GetRequestCount(kPrerenderingUrl), 1);
}
// Disabled flaky test. https://crbug.com/1156141
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
DISABLED_LinkRelPrerender_Multiple) {
const GURL kInitialUrl = GetUrl("/prerender/multiple_prerenders.html");
const GURL kPrerenderingUrl1 = GetUrl("/empty.html?1");
const GURL kPrerenderingUrl2 = GetUrl("/empty.html?2");
// Start watching new web contents to be created for prerendering.
content::TestNavigationObserver navigation_observer1(kPrerenderingUrl1);
content::TestNavigationObserver navigation_observer2(kPrerenderingUrl2);
navigation_observer1.StartWatchingNewWebContents();
navigation_observer2.StartWatchingNewWebContents();
// Navigate to a page that initiates prerendering for `kPrerenderingUrl1` and
// `kPrerenderingUrl2`.
ASSERT_TRUE(NavigateToURL(shell(), kInitialUrl));
// Wait until the completion of prerendering.
navigation_observer1.Wait();
navigation_observer2.Wait();
// Requests should be issued for `kPrerenderingUrl1` and `kPrerenderingUrl2`.
EXPECT_EQ(GetRequestCount(kPrerenderingUrl1), 1);
EXPECT_EQ(GetRequestCount(kPrerenderingUrl2), 1);
// PrerenderHosts for `kPrerenderingUrl1` and `kPrerenderingUrl2` should be
// registered in PrerenderHostRegistry.
PrerenderHostRegistry& registry = GetPrerenderHostRegistry();
EXPECT_NE(registry.FindHostByUrlForTesting(kPrerenderingUrl1), nullptr);
EXPECT_NE(registry.FindHostByUrlForTesting(kPrerenderingUrl2), nullptr);
// Activate the prerendered page. NavigateToURL() is not available here
// because the helper accesses the predecessor WebContents but it is destroyed
// during activation.
EXPECT_EQ(shell()->web_contents()->GetURL(), kInitialUrl);
content::TestNavigationObserver activation_observer(shell()->web_contents());
EXPECT_TRUE(ExecJs(shell()->web_contents(),
JsReplace("location = $1", kPrerenderingUrl2)));
activation_observer.Wait();
EXPECT_EQ(shell()->web_contents()->GetURL(), kPrerenderingUrl2);
// PrerenderHosts should be consumed or destroyed for activation.
EXPECT_EQ(registry.FindHostByUrlForTesting(kPrerenderingUrl1), nullptr);
EXPECT_EQ(registry.FindHostByUrlForTesting(kPrerenderingUrl2), nullptr);
// Activating the prerendered page should not issue a request.
EXPECT_EQ(GetRequestCount(kPrerenderingUrl1), 1);
EXPECT_EQ(GetRequestCount(kPrerenderingUrl2), 1);
}
// Disabled flaky test. https://crbug.com/1156141
IN_PROC_BROWSER_TEST_F(PrerenderBrowserTest,
DISABLED_LinkRelPrerender_Duplicate) {
const GURL kInitialUrl = GetUrl("/prerender/duplicate_prerenders.html");
const GURL kPrerenderingUrl1 = GetUrl("/empty.html?1");
const GURL kPrerenderingUrl2 = GetUrl("/empty.html?2");
// Start watching new web contents to be created for prerendering.
content::TestNavigationObserver navigation_observer1(kPrerenderingUrl1);
content::TestNavigationObserver navigation_observer2(kPrerenderingUrl2);
navigation_observer1.StartWatchingNewWebContents();
navigation_observer2.StartWatchingNewWebContents();
// Navigate to a page that initiates prerendering for `kPrerenderingUrl1`
// twice. The second prerendering request should be ignored.
ASSERT_TRUE(NavigateToURL(shell(), kInitialUrl));
// Wait until the completion of prerendering.
navigation_observer1.Wait();
navigation_observer2.Wait();
// Requests should be issued once per prerendering URL.
EXPECT_EQ(GetRequestCount(kPrerenderingUrl1), 1);
EXPECT_EQ(GetRequestCount(kPrerenderingUrl2), 1);
// PrerenderHosts for `kPrerenderingUrl1` and `kPrerenderingUrl2` should be
// registered in PrerenderHostRegistry.
PrerenderHostRegistry& registry = GetPrerenderHostRegistry();
EXPECT_NE(registry.FindHostByUrlForTesting(kPrerenderingUrl1), nullptr);
EXPECT_NE(registry.FindHostByUrlForTesting(kPrerenderingUrl2), nullptr);
// Activate the prerendered page. NavigateToURL() is not available here
// because the helper accesses the predecessor WebContents but it is destroyed
// during activation.
EXPECT_EQ(shell()->web_contents()->GetURL(), kInitialUrl);
content::TestNavigationObserver activation_observer(shell()->web_contents());
EXPECT_TRUE(ExecJs(shell()->web_contents(),
JsReplace("location = $1", kPrerenderingUrl1)));
activation_observer.Wait();
EXPECT_EQ(shell()->web_contents()->GetURL(), kPrerenderingUrl1);
// PrerenderHosts should be consumed or destroyed for activation.
EXPECT_EQ(registry.FindHostByUrlForTesting(kPrerenderingUrl1), nullptr);
EXPECT_EQ(registry.FindHostByUrlForTesting(kPrerenderingUrl2), nullptr);
// Activating the prerendered page should not issue a request.
EXPECT_EQ(GetRequestCount(kPrerenderingUrl1), 1);
EXPECT_EQ(GetRequestCount(kPrerenderingUrl2), 1);
}
// TODO(https://crbug.com/1132746): Test canceling prerendering.
// TODO(https://crbug.com/1132746): Test prerendering for 404 page, redirection,
// auth error, cross origin, etc.
} // namespace
} // namespace content
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