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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/tpcd/experiment/eligibility_service.h"
#include <memory>
#include <string>
#include <utility>
#include "base/containers/contains.h"
#include "base/metrics/histogram_base.h"
#include "base/strings/strcat.h"
#include "base/strings/to_string.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/scoped_feature_list.h"
#include "chrome/browser/privacy_sandbox/privacy_sandbox_settings_factory.h"
#include "chrome/browser/privacy_sandbox/tracking_protection_onboarding_factory.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/tpcd/experiment/eligibility_service_factory.h"
#include "chrome/browser/tpcd/experiment/tpcd_experiment_features.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/metrics/content/subprocess_metrics_provider.h"
#include "components/privacy_sandbox/privacy_sandbox_settings.h"
#include "components/privacy_sandbox/privacy_sandbox_test_util.h"
#include "components/privacy_sandbox/tracking_protection_onboarding.h"
#include "content/public/browser/storage_partition.h"
#include "content/public/common/content_features.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "net/dns/mock_host_resolver.h"
#include "net/http/http_status_code.h"
#include "net/test/embedded_test_server/controllable_http_response.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "net/test/embedded_test_server/http_request.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace tpcd::experiment {
namespace {
constexpr char kSecCookieDeprecationHeaderStatus[] =
"Privacy.3PCD.SecCookieDeprecationHeaderStatus";
} // namespace
// These tests are running with "force_eligible" enabled to be deterministic
// and avoid being flaky.
class EligibilityServiceBrowserTestBase : public InProcessBrowserTest {
public:
EligibilityServiceBrowserTestBase(bool disable_3p_cookies,
bool enable_silent_onboarding) {
feature_list_.InitAndEnableFeatureWithParameters(
features::kCookieDeprecationFacilitatedTesting,
{{"label", "label_test"},
{"force_eligible", "true"},
{kDisable3PCookiesName, base::ToString(disable_3p_cookies)},
{kEnableSilentOnboardingName,
base::ToString(enable_silent_onboarding)}});
}
void SetUpOnMainThread() override {
host_resolver()->AddRule("*", "127.0.0.1");
https_server_.SetSSLConfig(net::EmbeddedTestServer::CERT_TEST_NAMES);
https_server_.ServeFilesFromSourceDirectory("content/test/data");
}
protected:
void AddImageToDocument(const GURL& src_url) {
ASSERT_EQ(true,
EvalJs(GetActiveWebContents(),
base::StrCat({"((() => { const img = "
"document.createElement('img'); img.src = '",
src_url.spec(), "'; return true; })())"})));
}
void FlushNetworkInterface() {
browser()
->profile()
->GetDefaultStoragePartition()
->FlushNetworkInterfaceForTesting();
}
void MarkProfileEligibility(bool is_eligible) {
auto* eligibility_service =
tpcd::experiment::EligibilityServiceFactory::GetForProfile(
browser()->profile());
eligibility_service->MarkProfileEligibility(is_eligible);
}
net::EmbeddedTestServer https_server_{
net::test_server::EmbeddedTestServer::TYPE_HTTPS};
private:
content::WebContents* GetActiveWebContents() {
return browser()->tab_strip_model()->GetActiveWebContents();
}
base::test::ScopedFeatureList feature_list_;
};
// The param indicates whether the user is in in a cohort with 3PCD enabled.
// (True indicates that third-party cookies are blocked.)
class EligibilityServiceBrowserTest : public EligibilityServiceBrowserTestBase,
public testing::WithParamInterface<bool> {
public:
EligibilityServiceBrowserTest()
: EligibilityServiceBrowserTestBase(/*disable_3p_cookies=*/GetParam(),
/*enable_silent_onboarding=*/false) {}
};
IN_PROC_BROWSER_TEST_P(EligibilityServiceBrowserTest,
EligibilityChanged_NetworkContextUpdated) {
base::HistogramTester histograms;
auto response_b_a =
std::make_unique<net::test_server::ControllableHttpResponse>(
&https_server_, "/b_a");
auto response_b_b =
std::make_unique<net::test_server::ControllableHttpResponse>(
&https_server_, "/b_b");
auto response_b_c =
std::make_unique<net::test_server::ControllableHttpResponse>(
&https_server_, "/b_c");
ASSERT_TRUE(https_server_.Start());
ASSERT_TRUE(ui_test_utils::NavigateToURL(
browser(), https_server_.GetURL("a.test", "/title1.html")));
auto* privacy_sandbox_settings =
PrivacySandboxSettingsFactory::GetForProfile(browser()->profile());
auto privacy_sandbox_delegate = std::make_unique<
privacy_sandbox_test_util::MockPrivacySandboxSettingsDelegate>();
EXPECT_CALL(*privacy_sandbox_delegate, IsCookieDeprecationLabelAllowed)
.WillOnce(testing::Return(false))
.WillOnce(testing::Return(false))
.WillOnce(testing::Return(true))
.WillOnce(testing::Return(true));
privacy_sandbox_settings->SetDelegateForTesting(
std::move(privacy_sandbox_delegate));
ASSERT_FALSE(privacy_sandbox_settings->IsCookieDeprecationLabelAllowed());
// `is_eligible` only affects onboarding and is irrelevant to this test.
MarkProfileEligibility(/*is_eligible=*/true);
// Ensures the cookie deprecation label is updated in the network context.
FlushNetworkInterface();
AddImageToDocument(https_server_.GetURL("b.test", "/b_a"));
// [b.test/a] - Non opted-in request should not receive a label header.
response_b_a->WaitForRequest();
ASSERT_FALSE(base::Contains(response_b_a->http_request()->headers,
"Sec-Cookie-Deprecation"));
// kSet = 0, kNoLabel = 1
metrics::SubprocessMetricsProvider::MergeHistogramDeltasForTesting();
const auto no_label_count =
histograms.GetBucketCount(kSecCookieDeprecationHeaderStatus, 1);
EXPECT_GT(no_label_count, 0);
histograms.ExpectBucketCount(kSecCookieDeprecationHeaderStatus, 0, 0);
auto http_response_b_a =
std::make_unique<net::test_server::BasicHttpResponse>();
http_response_b_a->set_code(net::HTTP_MOVED_PERMANENTLY);
http_response_b_a->AddCustomHeader(
"Location", https_server_.GetURL("b.test", "/b_b").spec());
// b.test opts in to receiving the label.
http_response_b_a->AddCustomHeader(
"Set-Cookie",
"receive-cookie-deprecation=any-value; Secure; HttpOnly; "
"Path=/; SameSite=None; Partitioned");
response_b_a->Send(http_response_b_a->ToResponseString());
response_b_a->Done();
// [b.test/b] - Opted-in request should not receive a label header if
// disallowed.
response_b_b->WaitForRequest();
ASSERT_FALSE(base::Contains(response_b_b->http_request()->headers,
"Sec-Cookie-Deprecation"));
ASSERT_TRUE(privacy_sandbox_settings->IsCookieDeprecationLabelAllowed());
// kSet = 0, kNoLabel = 1
metrics::SubprocessMetricsProvider::MergeHistogramDeltasForTesting();
histograms.ExpectBucketCount(kSecCookieDeprecationHeaderStatus, 0, 0);
EXPECT_GT(histograms.GetBucketCount(kSecCookieDeprecationHeaderStatus, 1),
no_label_count);
MarkProfileEligibility(/*is_eligible=*/true);
// Ensures the cookie deprecation label is updated in the network context.
FlushNetworkInterface();
AddImageToDocument(https_server_.GetURL("b.test", "/b_c"));
// [b.test/c] - Opted-in request should receive a label header if allowed.
response_b_c->WaitForRequest();
ASSERT_TRUE(base::Contains(response_b_c->http_request()->headers,
"Sec-Cookie-Deprecation"));
EXPECT_EQ(response_b_c->http_request()->headers.at("Sec-Cookie-Deprecation"),
"label_test");
// kSet = 0
metrics::SubprocessMetricsProvider::MergeHistogramDeltasForTesting();
histograms.ExpectBucketCount(kSecCookieDeprecationHeaderStatus, 0, 1);
}
INSTANTIATE_TEST_SUITE_P(All, EligibilityServiceBrowserTest, testing::Bool());
} // namespace tpcd::experiment
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