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// Copyright 2013 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 "components/precache/content/precache_manager.h"
#include <list>
#include <map>
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/bind.h"
#include "base/callback.h"
#include "base/command_line.h"
#include "base/compiler_specific.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_samples.h"
#include "base/metrics/statistics_recorder.h"
#include "components/precache/core/precache_switches.h"
#include "components/precache/core/url_list_provider.h"
#include "content/public/test/test_browser_context.h"
#include "content/public/test/test_browser_thread_bundle.h"
#include "net/http/http_status_code.h"
#include "net/url_request/test_url_fetcher_factory.h"
#include "net/url_request/url_request_status.h"
#include "net/url_request/url_request_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
namespace precache {
namespace {
// A map of histogram names to the total sample counts.
typedef std::map<std::string, base::HistogramBase::Count> HistogramCountMap;
const char kConfigURL[] = "http://config-url.com";
const char kManifestURLPrefix[] = "http://manifest-url-prefix.com/";
base::HistogramBase::Count GetHistogramTotalCount(const char* histogram_name) {
base::HistogramBase* histogram =
base::StatisticsRecorder::FindHistogram(histogram_name);
return histogram ? histogram->SnapshotSamples()->TotalCount() : 0;
}
HistogramCountMap GetHistogramCountMap() {
// Note that the PrecacheManager tests don't care about the ".Cellular"
// histograms.
const char* kHistogramNames[] = {"Precache.DownloadedPrecacheMotivated",
"Precache.DownloadedNonPrecache",
"Precache.Saved"};
HistogramCountMap histogram_count_map;
for (size_t i = 0; i < arraysize(kHistogramNames); ++i) {
histogram_count_map[kHistogramNames[i]] =
GetHistogramTotalCount(kHistogramNames[i]);
}
return histogram_count_map;
}
class TestURLFetcherCallback {
public:
scoped_ptr<net::FakeURLFetcher> CreateURLFetcher(
const GURL& url, net::URLFetcherDelegate* delegate,
const std::string& response_data, net::HttpStatusCode response_code,
net::URLRequestStatus::Status status) {
scoped_ptr<net::FakeURLFetcher> fetcher(new net::FakeURLFetcher(
url, delegate, response_data, response_code, status));
requested_urls_.insert(url);
return fetcher.Pass();
}
const std::multiset<GURL>& requested_urls() const {
return requested_urls_;
}
private:
// Multiset with one entry for each URL requested.
std::multiset<GURL> requested_urls_;
};
class FakeURLListProvider : public URLListProvider {
public:
FakeURLListProvider(const std::list<GURL>& urls, bool run_immediately)
: urls_(urls),
run_immediately_(run_immediately),
was_get_urls_called_(false) {}
virtual void GetURLs(const GetURLsCallback& callback) override {
was_get_urls_called_ = true;
if (run_immediately_) {
callback.Run(urls_);
} else {
// Post the callback to be run later in the message loop.
base::MessageLoop::current()->PostTask(FROM_HERE,
base::Bind(callback, urls_));
}
}
bool was_get_urls_called() const {
return was_get_urls_called_;
}
private:
const std::list<GURL> urls_;
const bool run_immediately_;
bool was_get_urls_called_;
};
class TestPrecacheCompletionCallback {
public:
TestPrecacheCompletionCallback() : was_on_done_called_(false) {}
void OnDone() {
was_on_done_called_ = true;
}
PrecacheManager::PrecacheCompletionCallback GetCallback() {
return base::Bind(&TestPrecacheCompletionCallback::OnDone,
base::Unretained(this));
}
bool was_on_done_called() const {
return was_on_done_called_;
}
private:
bool was_on_done_called_;
};
class PrecacheManagerTest : public testing::Test {
public:
PrecacheManagerTest()
: precache_manager_(&browser_context_),
factory_(NULL, base::Bind(&TestURLFetcherCallback::CreateURLFetcher,
base::Unretained(&url_callback_))) {}
protected:
virtual void SetUp() override {
base::StatisticsRecorder::Initialize();
CommandLine::ForCurrentProcess()->AppendSwitchASCII(
switches::kPrecacheConfigSettingsURL, kConfigURL);
CommandLine::ForCurrentProcess()->AppendSwitchASCII(
switches::kPrecacheManifestURLPrefix, kManifestURLPrefix);
// Make the fetch of the precache configuration settings fail. Precaching
// should still complete normally in this case.
factory_.SetFakeResponse(GURL(kConfigURL), "",
net::HTTP_INTERNAL_SERVER_ERROR,
net::URLRequestStatus::FAILED);
}
content::TestBrowserThreadBundle test_browser_thread_bundle_;
content::TestBrowserContext browser_context_;
PrecacheManager precache_manager_;
TestURLFetcherCallback url_callback_;
net::FakeURLFetcherFactory factory_;
TestPrecacheCompletionCallback precache_callback_;
};
TEST_F(PrecacheManagerTest, StartAndFinishPrecaching) {
EXPECT_FALSE(precache_manager_.IsPrecaching());
FakeURLListProvider url_list_provider(
std::list<GURL>(1, GURL("http://starting-url.com")), false);
precache_manager_.StartPrecaching(precache_callback_.GetCallback(),
&url_list_provider);
EXPECT_TRUE(precache_manager_.IsPrecaching());
base::MessageLoop::current()->RunUntilIdle();
EXPECT_FALSE(precache_manager_.IsPrecaching());
EXPECT_TRUE(url_list_provider.was_get_urls_called());
EXPECT_TRUE(precache_callback_.was_on_done_called());
std::multiset<GURL> expected_requested_urls;
expected_requested_urls.insert(GURL(kConfigURL));
EXPECT_EQ(expected_requested_urls, url_callback_.requested_urls());
}
TEST_F(PrecacheManagerTest, StartAndCancelPrecachingBeforeURLsReceived) {
EXPECT_FALSE(precache_manager_.IsPrecaching());
FakeURLListProvider url_list_provider(
std::list<GURL>(1, GURL("http://starting-url.com")), false);
precache_manager_.StartPrecaching(precache_callback_.GetCallback(),
&url_list_provider);
EXPECT_TRUE(precache_manager_.IsPrecaching());
precache_manager_.CancelPrecaching();
EXPECT_FALSE(precache_manager_.IsPrecaching());
base::MessageLoop::current()->RunUntilIdle();
EXPECT_FALSE(precache_manager_.IsPrecaching());
EXPECT_TRUE(url_list_provider.was_get_urls_called());
EXPECT_FALSE(precache_callback_.was_on_done_called());
EXPECT_TRUE(url_callback_.requested_urls().empty());
}
TEST_F(PrecacheManagerTest, StartAndCancelPrecachingAfterURLsReceived) {
EXPECT_FALSE(precache_manager_.IsPrecaching());
FakeURLListProvider url_list_provider(
std::list<GURL>(1, GURL("http://starting-url.com")), true);
precache_manager_.StartPrecaching(precache_callback_.GetCallback(),
&url_list_provider);
// Since the |url_list_provider| ran the callback immediately, Start() has
// been called on the PrecacheFetcher, and the precache config settings have
// been requested. The response has not yet been received though, so
// precaching is still in progress.
EXPECT_TRUE(precache_manager_.IsPrecaching());
precache_manager_.CancelPrecaching();
EXPECT_FALSE(precache_manager_.IsPrecaching());
base::MessageLoop::current()->RunUntilIdle();
EXPECT_FALSE(precache_manager_.IsPrecaching());
EXPECT_TRUE(url_list_provider.was_get_urls_called());
EXPECT_FALSE(precache_callback_.was_on_done_called());
// Even though the response for the precache config settings should not have
// been received, the request should still have been made.
std::multiset<GURL> expected_requested_urls;
expected_requested_urls.insert(GURL(kConfigURL));
EXPECT_EQ(expected_requested_urls, url_callback_.requested_urls());
}
TEST_F(PrecacheManagerTest, RecordStatsForFetchWithIrrelevantFetches) {
HistogramCountMap expected_histogram_count_map = GetHistogramCountMap();
// Fetches with size 0 should be ignored.
precache_manager_.RecordStatsForFetch(GURL("http://url.com"), base::Time(), 0,
false);
base::MessageLoop::current()->RunUntilIdle();
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
// Fetches for URLs with schemes other than HTTP or HTTPS should be ignored.
precache_manager_.RecordStatsForFetch(GURL("ftp://ftp.com"), base::Time(),
1000, false);
base::MessageLoop::current()->RunUntilIdle();
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
// Fetches for empty URLs should be ignored.
precache_manager_.RecordStatsForFetch(GURL(), base::Time(), 1000, false);
base::MessageLoop::current()->RunUntilIdle();
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
}
TEST_F(PrecacheManagerTest, RecordStatsForFetchDuringPrecaching) {
HistogramCountMap expected_histogram_count_map = GetHistogramCountMap();
FakeURLListProvider url_list_provider(std::list<GURL>(), false);
precache_manager_.StartPrecaching(precache_callback_.GetCallback(),
&url_list_provider);
EXPECT_TRUE(precache_manager_.IsPrecaching());
precache_manager_.RecordStatsForFetch(GURL("http://url.com"), base::Time(),
1000, false);
precache_manager_.CancelPrecaching();
base::MessageLoop::current()->RunUntilIdle();
expected_histogram_count_map["Precache.DownloadedPrecacheMotivated"]++;
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
}
TEST_F(PrecacheManagerTest, RecordStatsForFetchHTTP) {
HistogramCountMap expected_histogram_count_map = GetHistogramCountMap();
precache_manager_.RecordStatsForFetch(GURL("http://http-url.com"),
base::Time(), 1000, false);
base::MessageLoop::current()->RunUntilIdle();
expected_histogram_count_map["Precache.DownloadedNonPrecache"]++;
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
}
TEST_F(PrecacheManagerTest, RecordStatsForFetchHTTPS) {
HistogramCountMap expected_histogram_count_map = GetHistogramCountMap();
precache_manager_.RecordStatsForFetch(GURL("https://https-url.com"),
base::Time(), 1000, false);
base::MessageLoop::current()->RunUntilIdle();
expected_histogram_count_map["Precache.DownloadedNonPrecache"]++;
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
}
TEST_F(PrecacheManagerTest, DeleteExpiredPrecacheHistory) {
// This test has to use Time::Now() because StartPrecaching uses Time::Now().
const base::Time kCurrentTime = base::Time::Now();
HistogramCountMap expected_histogram_count_map = GetHistogramCountMap();
FakeURLListProvider url_list_provider(std::list<GURL>(), false);
precache_manager_.StartPrecaching(precache_callback_.GetCallback(),
&url_list_provider);
EXPECT_TRUE(precache_manager_.IsPrecaching());
// Precache a bunch of URLs, with different fetch times.
precache_manager_.RecordStatsForFetch(
GURL("http://old-fetch.com"),
kCurrentTime - base::TimeDelta::FromDays(61), 1000, false);
precache_manager_.RecordStatsForFetch(
GURL("http://recent-fetch.com"),
kCurrentTime - base::TimeDelta::FromDays(59), 1000, false);
precache_manager_.RecordStatsForFetch(
GURL("http://yesterday-fetch.com"),
kCurrentTime - base::TimeDelta::FromDays(1), 1000, false);
expected_histogram_count_map["Precache.DownloadedPrecacheMotivated"] += 3;
precache_manager_.CancelPrecaching();
base::MessageLoop::current()->RunUntilIdle();
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
// The expired precache will be deleted during precaching this time.
precache_manager_.StartPrecaching(precache_callback_.GetCallback(),
&url_list_provider);
EXPECT_TRUE(precache_manager_.IsPrecaching());
precache_manager_.CancelPrecaching();
base::MessageLoop::current()->RunUntilIdle();
EXPECT_FALSE(precache_manager_.IsPrecaching());
// A fetch for the same URL as the expired precache was served from the cache,
// but it isn't reported as saved bytes because it had expired in the precache
// history.
precache_manager_.RecordStatsForFetch(
GURL("http://old-fetch.com"),
kCurrentTime, 1000, true);
base::MessageLoop::current()->RunUntilIdle();
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
// The other precaches should not have expired, so the following fetches from
// the cache should count as saved bytes.
precache_manager_.RecordStatsForFetch(
GURL("http://recent-fetch.com"),
kCurrentTime, 1000, true);
precache_manager_.RecordStatsForFetch(
GURL("http://yesterday-fetch.com"),
kCurrentTime, 1000, true);
expected_histogram_count_map["Precache.Saved"] += 2;
base::MessageLoop::current()->RunUntilIdle();
EXPECT_EQ(expected_histogram_count_map, GetHistogramCountMap());
}
} // namespace
} // namespace precache
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