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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 "base/test/scoped_feature_list.h"
#include "base/values.h"
#include "chrome/browser/policy/policy_test_utils.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/test/base/chrome_test_utils.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/policy_constants.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_features.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/test_utils.h"
class Browser;
namespace policy {
enum class CacheControlNoStorePagePolicy {
kDefault,
kAllowed,
kDisallowed,
};
struct BackForwardCacheWithCacheControlNoStorePagePolicyTestParam {
CacheControlNoStorePagePolicy policy_value;
bool expected_allow_bfcache_ccns_page;
};
class BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTest
: public PolicyTest,
public ::testing::WithParamInterface<
BackForwardCacheWithCacheControlNoStorePagePolicyTestParam> {
public:
static std::string DescribeParams(
const ::testing::TestParamInfo<ParamType>& info) {
switch (info.param.policy_value) {
case CacheControlNoStorePagePolicy::kDefault:
return "Default";
case CacheControlNoStorePagePolicy::kAllowed:
return "Allowed";
case CacheControlNoStorePagePolicy::kDisallowed:
return "Disallowed";
}
}
protected:
void SetUpCommandLine(base::CommandLine* command_line) override {
feature_list_.InitWithFeaturesAndParameters(
{{features::kBackForwardCache, {}},
{features::kCacheControlNoStoreEnterBackForwardCache,
{{"level", "restore-unless-http-only-cookie-change"}}}},
{});
}
void SetUpInProcessBrowserTestFixture() override {
PolicyTest::SetUpInProcessBrowserTestFixture();
if (GetParam().policy_value == CacheControlNoStorePagePolicy::kDefault) {
return;
}
// Set up the policy value for
// `kAllowBackForwardCacheForCacheControlNoStorePageEnabled`.
PolicyMap policies;
SetPolicy(&policies,
key::kAllowBackForwardCacheForCacheControlNoStorePageEnabled,
base::Value(GetParam().policy_value ==
CacheControlNoStorePagePolicy::kAllowed));
provider_.UpdateChromePolicy(policies);
}
content::RenderFrameHost* current_render_frame_host() {
return chrome_test_utils::GetActiveWebContents(this)->GetPrimaryMainFrame();
}
private:
base::test::ScopedFeatureList feature_list_;
};
const auto test_suite_value = ::testing::Values(
BackForwardCacheWithCacheControlNoStorePagePolicyTestParam{
CacheControlNoStorePagePolicy::kDefault,
/* expected_allow_bfcache_ccns_page= */ true},
BackForwardCacheWithCacheControlNoStorePagePolicyTestParam{
CacheControlNoStorePagePolicy::kAllowed,
/* expected_allow_bfcache_ccns_page= */ true},
BackForwardCacheWithCacheControlNoStorePagePolicyTestParam{
CacheControlNoStorePagePolicy::kDisallowed,
/* expected_allow_bfcache_ccns_page= */ false});
INSTANTIATE_TEST_SUITE_P(
All,
BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTest,
test_suite_value,
&BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTest::
DescribeParams);
// Test that a page loaded with "Cache-Control:no-store" header cannot enter
// BackForwardCache if the ContentBrowserClient disables BFCache for CCNS pages.
IN_PROC_BROWSER_TEST_P(
BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTest,
PolicyIsFollowed) {
ASSERT_TRUE(embedded_test_server()->Start());
GURL url_a(embedded_test_server()->GetURL(
"a.com", "/set-header?Cache-Control: no-store"));
GURL url_b(embedded_test_server()->GetURL("b.com", "/title1.html"));
GURL url_c(embedded_test_server()->GetURL("c.com", "/title1.html"));
// 1) Load the document and specify no-store for the main resource.
ASSERT_TRUE(NavigateToUrl(url_a, this));
content::RenderFrameHostWrapper rfh_a(current_render_frame_host());
// 2) Navigate away. If the enterprise policy disallows BFCaching CCNS page,
// `rfh_a` should not enter BFCache. Otherwise, `rfh_a` should be stored in
// BFCache.
ASSERT_TRUE(NavigateToUrl(url_b, this));
content::RenderFrameHostWrapper rfh_b(current_render_frame_host());
if (GetParam().expected_allow_bfcache_ccns_page) {
ASSERT_TRUE(rfh_a->GetLifecycleState() ==
content::RenderFrameHost::LifecycleState::kInBackForwardCache);
} else {
ASSERT_TRUE(rfh_a.WaitUntilRenderFrameDeleted());
}
// 3) Verify that the page without CCNS is eligible for BFCache.
ASSERT_TRUE(NavigateToUrl(url_c, this));
ASSERT_TRUE(rfh_b->GetLifecycleState() ==
content::RenderFrameHost::LifecycleState::kInBackForwardCache);
}
// Test that the `ShouldAllowBackForwardCacheForCacheControlNoStorePage()`
// returns the correct value for different policy settings.
IN_PROC_BROWSER_TEST_P(
BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTest,
ShouldAllowBackForwardCacheForCacheControlNoStorePage) {
bool should_allow_bfcache_ccns_page =
content::GetContentClientForTesting()
->browser()
->ShouldAllowBackForwardCacheForCacheControlNoStorePage(
current_render_frame_host()->GetBrowserContext());
ASSERT_EQ(should_allow_bfcache_ccns_page,
GetParam().expected_allow_bfcache_ccns_page);
}
class BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTestKioskMode
: public BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTest {
protected:
void SetUpCommandLine(base::CommandLine* command_line) override {
command_line->AppendSwitch(switches::kKioskMode);
BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTest::
SetUpCommandLine(command_line);
}
};
INSTANTIATE_TEST_SUITE_P(
All,
BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTestKioskMode,
test_suite_value,
&BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTest::
DescribeParams);
// Test that a page loaded with "Cache-Control:no-store" header cannot enter
// BackForwardCache if the ContentBrowserClient disables BFCache for CCNS pages.
IN_PROC_BROWSER_TEST_P(
BackForwardCacheWithCacheControlNoStorePagePolicyBrowserTestKioskMode,
PolicyIsOverridenByKioskMode) {
ASSERT_TRUE(embedded_test_server()->Start());
GURL url_a(embedded_test_server()->GetURL(
"a.com", "/set-header?Cache-Control: no-store"));
GURL url_b(embedded_test_server()->GetURL("b.com", "/title1.html"));
GURL url_c(embedded_test_server()->GetURL("c.com", "/title1.html"));
// 1) Load the document and specify no-store for the main resource.
ASSERT_TRUE(NavigateToUrl(url_a, this));
content::RenderFrameHostWrapper rfh_a(current_render_frame_host());
// 2) Navigate away. If the enterprise policy disallows BFCaching CCNS page,
// `rfh_a` should not enter BFCache. Otherwise, `rfh_a` should be stored in
// BFCache.
ASSERT_TRUE(NavigateToUrl(url_b, this));
content::RenderFrameHostWrapper rfh_b(current_render_frame_host());
ASSERT_TRUE(rfh_a.WaitUntilRenderFrameDeleted());
// 3) Verify that the page without CCNS is eligible for BFCache.
ASSERT_TRUE(NavigateToUrl(url_c, this));
ASSERT_TRUE(rfh_b->GetLifecycleState() ==
content::RenderFrameHost::LifecycleState::kInBackForwardCache);
}
} // namespace policy
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