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/*
* Copyright (C) 2025 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(CONTENT_EXTENSIONS)
#include "Utilities.h"
#include <WebCore/ResourceMonitorThrottlerHolder.h>
#include <wtf/FileSystem.h>
#include <wtf/MainThread.h>
namespace TestWebKitAPI {
using namespace WebCore;
class ResourceMonitorTest : public testing::Test {
public:
void SetUp() override
{
WTF::initializeMainThread();
m_reference = ContinuousApproximateTime::now();
}
protected:
ContinuousApproximateTime m_reference;
RefPtr<ResourceMonitorThrottlerHolder> m_throttler;
String m_temporayDatabasePath;
void prepareThrottler(size_t count, Seconds duration, size_t maxHosts, bool withPersistence = false)
{
if (withPersistence)
m_throttler = ResourceMonitorThrottlerHolder::create(temporaryDatabasePath(), count, duration, maxHosts);
else
m_throttler = ResourceMonitorThrottlerHolder::create(count, duration, maxHosts);
}
void prepareThrottler(bool withPersistence = false)
{
if (withPersistence)
m_throttler = ResourceMonitorThrottlerHolder::create(temporaryDatabasePath());
else
m_throttler = ResourceMonitorThrottlerHolder::create();
}
void disposeThrottler()
{
m_throttler = nullptr;
}
ResourceMonitorThrottlerHolder* throttler()
{
return m_throttler.get();
}
ContinuousApproximateTime now()
{
auto t = m_reference;
m_reference += 1_ms;
return t;
}
ContinuousApproximateTime later(Seconds delta)
{
m_reference += delta;
return m_reference;
}
bool tryAccess(const String& host, ContinuousApproximateTime time)
{
bool result;
bool completed = false;
m_throttler->tryAccess(host, time, [&] (bool wasGranted) {
result = wasGranted;
completed = true;
});
Util::run(&completed);
return result;
}
String& temporaryDatabasePath()
{
if (m_temporayDatabasePath.isEmpty()) {
m_temporayDatabasePath = FileSystem::createTemporaryFile("tempDatabaseForResourceMonitorThrottler"_s);
FileSystem::deleteFile(m_temporayDatabasePath);
}
return m_temporayDatabasePath;
}
};
TEST_F(ResourceMonitorTest, ThrottlerBasic)
{
prepareThrottler(/* size */ 2, /* duration */ 1_s, /* maxHosts */ 1);
auto host = "example.com"_s;
// first access must be okay.
EXPECT_TRUE(tryAccess(host, now()));
// second one is alse okay.
EXPECT_TRUE(tryAccess(host, now()));
// but third one is not okay because size is 2.
EXPECT_FALSE(tryAccess(host, now()));
// after duration, it should be okay.
EXPECT_TRUE(tryAccess(host, later(1_s)));
}
TEST_F(ResourceMonitorTest, ThrottlerMaxHosts)
{
prepareThrottler(/* size */ 2, /* duration */ 1_s, /* maxHosts */ 2);
auto host1 = "h1.example.com"_s;
auto host2 = "h2.example.com"_s;
auto host3 = "h3.example.com"_s;
// make host1 inaccessible.
EXPECT_TRUE(tryAccess(host1, now()));
EXPECT_TRUE(tryAccess(host1, now()));
EXPECT_FALSE(tryAccess(host1, now()));
// host2 is accessible and still host1 is not.
EXPECT_TRUE(tryAccess(host2, now()));
EXPECT_FALSE(tryAccess(host1, now()));
// host3 is accessible and host1 is now also accessible because of the max host.
EXPECT_TRUE(tryAccess(host3, now()));
EXPECT_TRUE(tryAccess(host1, now()));
}
TEST_F(ResourceMonitorTest, ThrottlerLeastRecentAccessedHostWillBeRemoved)
{
prepareThrottler(/* size */ 2, /* duration */ 1_s, /* maxHosts */ 2);
auto host1 = "h1.example.com"_s;
auto host2 = "h2.example.com"_s;
auto host3 = "h3.example.com"_s;
// host1 is the oldest access.
EXPECT_TRUE(tryAccess(host1, now()));
// make host2 inaccessible
EXPECT_TRUE(tryAccess(host2, now()));
EXPECT_TRUE(tryAccess(host2, now()));
EXPECT_FALSE(tryAccess(host2, now()));
// make host1 inaccessible and this is the most recent access.
EXPECT_TRUE(tryAccess(host1, now()));
EXPECT_FALSE(tryAccess(host1, now()));
// host3 is accessible. In this access, lest recent host is removed.
EXPECT_TRUE(tryAccess(host3, now()));
// host1 is the oldest, but recent than host2. Still it is blocked.
EXPECT_FALSE(tryAccess(host1, now()));
// host2 is the least recent access and removed in host3 access. So it is accessible.
EXPECT_TRUE(tryAccess(host2, now()));
}
TEST_F(ResourceMonitorTest, ThrottlerEmptyHostname)
{
prepareThrottler(/* size */ 2, /* duration */ 1_s, /* maxHosts */ 2);
auto emptyHost = ""_s;
// Accessing with an empty hostname should not crash.
EXPECT_FALSE(tryAccess(emptyHost, now()));
}
TEST_F(ResourceMonitorTest, ThrottlerPersistence)
{
auto host = "example.com"_s;
prepareThrottler(/* size */ 2, /* duration */ 1_s, /* maxHosts */ 2, /* withPersistence */ true);
// first access must be okay.
EXPECT_TRUE(tryAccess(host, now()));
// second one is alse okay.
EXPECT_TRUE(tryAccess(host, now()));
// but third one is not okay because size is 2.
EXPECT_FALSE(tryAccess(host, now()));
disposeThrottler();
prepareThrottler(/* size */ 2, /* duration */ 1_s, /* maxHosts */ 2, /* withPersistence */ true);
// recover all history from database so still third one is not okay because size is 2.
EXPECT_FALSE(tryAccess(host, now()));
}
TEST_F(ResourceMonitorTest, ThrottlerCreateAndDelete)
{
// Shouldn't crash with immediate disposal.
prepareThrottler(true);
disposeThrottler();
EXPECT_FALSE(throttler());
}
} // namespace TestWebKitAPI
#endif // ENABLE(CONTENT_EXTENSIONS)
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