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// Copyright 2020 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/preloading/prefetch/prefetch_service/prefetch_origin_decider.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/scoped_feature_list.h"
#include "base/test/simple_test_clock.h"
#include "components/prefs/testing_pref_service.h"
#include "testing/gtest/include/gtest/gtest.h"
class PrefetchOriginDeciderTest : public testing::Test {
public:
void SetUp() override {
PrefetchOriginDecider::RegisterPrefs(pref_service_.registry());
}
std::unique_ptr<PrefetchOriginDecider> NewDecider() {
return std::make_unique<PrefetchOriginDecider>(&pref_service_, &clock_);
}
base::SimpleTestClock* clock() { return &clock_; }
base::HistogramTester* histogram_tester() { return &histogram_tester_; }
private:
TestingPrefServiceSimple pref_service_;
base::SimpleTestClock clock_;
base::HistogramTester histogram_tester_;
};
TEST_F(PrefetchOriginDeciderTest, DefaultEligible) {
auto decider = NewDecider();
EXPECT_TRUE(decider->IsOriginOutsideRetryAfterWindow(GURL("http://foo.com")));
}
TEST_F(PrefetchOriginDeciderTest, NegativeIgnored) {
GURL url("http://foo.com");
auto decider = NewDecider();
decider->ReportOriginRetryAfter(url, base::Seconds(-1));
EXPECT_TRUE(decider->IsOriginOutsideRetryAfterWindow(url));
}
TEST_F(PrefetchOriginDeciderTest, WaitsForDelta) {
GURL url("http://foo.com");
auto decider = NewDecider();
decider->ReportOriginRetryAfter(url, base::Seconds(15));
histogram_tester()->ExpectUniqueTimeSample(
"PrefetchProxy.Prefetch.Mainframe.RetryAfter", base::Seconds(15), 1);
for (size_t i = 0; i <= 15; i++) {
EXPECT_FALSE(decider->IsOriginOutsideRetryAfterWindow(url));
clock()->Advance(base::Seconds(1));
}
EXPECT_TRUE(decider->IsOriginOutsideRetryAfterWindow(url));
}
TEST_F(PrefetchOriginDeciderTest, ByOrigin) {
auto decider = NewDecider();
decider->ReportOriginRetryAfter(GURL("http://foo.com"), base::Seconds(1));
histogram_tester()->ExpectUniqueTimeSample(
"PrefetchProxy.Prefetch.Mainframe.RetryAfter", base::Seconds(1), 1);
// Any url for the origin should be ineligible.
for (const GURL& url : {
GURL("http://foo.com"),
GURL("http://foo.com/path"),
GURL("http://foo.com/?query=yes"),
}) {
SCOPED_TRACE(url);
EXPECT_FALSE(decider->IsOriginOutsideRetryAfterWindow(url));
}
// Other origins are eligible.
for (const GURL& url : {
GURL("http://foo.com:1234"),
GURL("https://foo.com/"),
GURL("http://test.com/"),
}) {
SCOPED_TRACE(url);
EXPECT_TRUE(decider->IsOriginOutsideRetryAfterWindow(url));
}
}
TEST_F(PrefetchOriginDeciderTest, Clear) {
GURL url("http://foo.com");
auto decider = NewDecider();
decider->ReportOriginRetryAfter(url, base::Seconds(1));
histogram_tester()->ExpectUniqueTimeSample(
"PrefetchProxy.Prefetch.Mainframe.RetryAfter", base::Seconds(1), 1);
EXPECT_FALSE(decider->IsOriginOutsideRetryAfterWindow(url));
decider->OnBrowsingDataCleared();
EXPECT_TRUE(decider->IsOriginOutsideRetryAfterWindow(url));
}
TEST_F(PrefetchOriginDeciderTest, PersistentPrefs) {
{
auto decider = NewDecider();
decider->ReportOriginRetryAfter(GURL("http://expired.com"),
base::Seconds(1));
decider->ReportOriginRetryAfter(GURL("http://foo.com"), base::Seconds(3));
histogram_tester()->ExpectTimeBucketCount(
"PrefetchProxy.Prefetch.Mainframe.RetryAfter", base::Seconds(1), 1);
histogram_tester()->ExpectTimeBucketCount(
"PrefetchProxy.Prefetch.Mainframe.RetryAfter", base::Seconds(3), 1);
histogram_tester()->ExpectTotalCount(
"PrefetchProxy.Prefetch.Mainframe.RetryAfter", 2);
}
clock()->Advance(base::Seconds(2));
{
auto decider = NewDecider();
EXPECT_TRUE(
decider->IsOriginOutsideRetryAfterWindow(GURL("http://expired.com")));
EXPECT_FALSE(
decider->IsOriginOutsideRetryAfterWindow(GURL("http://foo.com")));
}
}
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