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// Copyright 2015 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 "chrome/browser/mod_pagespeed/mod_pagespeed_metrics.h"
#include <algorithm>
#include <string>
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/metrics/histogram.h"
#include "base/metrics/histogram_samples.h"
#include "base/metrics/statistics_recorder.h"
#include "content/public/common/resource_type.h"
#include "net/http/http_response_headers.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "url/gurl.h"
namespace mod_pagespeed {
// Ensure that we count PageSpeed headers correctly.
TEST(ModPagespeedMetricsTest, CountPageSpeedHeadersTest) {
base::StatisticsRecorder::Initialize();
GURL url("http://google.com");
std::string temp("HTTP/1.1 200 OK\n\n");
std::replace(temp.begin(), temp.end(), '\n', '\0');
scoped_refptr<net::HttpResponseHeaders> headers(
new net::HttpResponseHeaders(temp));
int num_responses = 0;
int num_mps = 0;
int num_ngx = 0;
int num_pss = 0;
int num_other = 0;
int num_bucket_1 = 0; // unrecognized format/value bucket
int num_bucket_30 = 0; // 1.2.24.1 bucket
int num_bucket_33 = 0; // 1.3.25.2 bucket
scoped_ptr<base::HistogramSamples> server_samples;
scoped_ptr<base::HistogramSamples> version_samples;
// No PageSpeed header. The VersionCounts histogram isn't created yet.
RecordMetrics(content::RESOURCE_TYPE_MAIN_FRAME, url, headers.get());
base::HistogramBase* server_histogram =
base::StatisticsRecorder::FindHistogram(
"Prerender.PagespeedHeader.ServerCounts");
ASSERT_TRUE(server_histogram != NULL);
ASSERT_TRUE(NULL == base::StatisticsRecorder::FindHistogram(
"Prerender.PagespeedHeader.VersionCounts"));
server_samples = server_histogram->SnapshotSamples();
EXPECT_EQ(++num_responses, server_samples->GetCount(0));
EXPECT_EQ(num_mps, server_samples->GetCount(1));
EXPECT_EQ(num_ngx, server_samples->GetCount(2));
EXPECT_EQ(num_pss, server_samples->GetCount(3));
EXPECT_EQ(num_other, server_samples->GetCount(4));
// X-Mod-Pagespeed header in expected format. VersionCounts now exists.
headers->AddHeader("X-Mod-Pagespeed: 1.2.24.1-2300");
RecordMetrics(content::RESOURCE_TYPE_MAIN_FRAME, url, headers.get());
base::HistogramBase* version_histogram =
base::StatisticsRecorder::FindHistogram(
"Prerender.PagespeedHeader.VersionCounts");
ASSERT_TRUE(version_histogram != NULL);
server_samples = server_histogram->SnapshotSamples();
version_samples = version_histogram->SnapshotSamples();
EXPECT_EQ(++num_responses, server_samples->GetCount(0));
EXPECT_EQ(++num_mps, server_samples->GetCount(1));
EXPECT_EQ(num_ngx, server_samples->GetCount(2));
EXPECT_EQ(num_pss, server_samples->GetCount(3));
EXPECT_EQ(num_other, server_samples->GetCount(4));
EXPECT_EQ(num_bucket_1, version_samples->GetCount(1));
EXPECT_EQ(++num_bucket_30, version_samples->GetCount(30)); // +1 for #30
EXPECT_EQ(num_bucket_33, version_samples->GetCount(33));
headers->RemoveHeader("X-Mod-Pagespeed");
// X-Mod-Pagespeed header in unexpected format.
headers->AddHeader("X-Mod-Pagespeed: Powered By PageSpeed!");
RecordMetrics(content::RESOURCE_TYPE_MAIN_FRAME, url, headers.get());
server_samples = server_histogram->SnapshotSamples();
version_samples = version_histogram->SnapshotSamples();
EXPECT_EQ(++num_responses, server_samples->GetCount(0));
EXPECT_EQ(++num_mps, server_samples->GetCount(1));
EXPECT_EQ(num_ngx, server_samples->GetCount(2));
EXPECT_EQ(num_pss, server_samples->GetCount(3));
EXPECT_EQ(num_other, server_samples->GetCount(4));
EXPECT_EQ(++num_bucket_1, version_samples->GetCount(1)); // +1 for 'huh?'
EXPECT_EQ(num_bucket_30, version_samples->GetCount(30));
EXPECT_EQ(num_bucket_33, version_samples->GetCount(33));
headers->RemoveHeader("X-Mod-Pagespeed");
// X-Page-Speed header in mod_pagespeed format (so ngx_pagespeed).
headers->AddHeader("X-Page-Speed: 1.3.25.2-2530");
RecordMetrics(content::RESOURCE_TYPE_MAIN_FRAME, url, headers.get());
server_samples = server_histogram->SnapshotSamples();
version_samples = version_histogram->SnapshotSamples();
EXPECT_EQ(++num_responses, server_samples->GetCount(0));
EXPECT_EQ(num_mps, server_samples->GetCount(1));
EXPECT_EQ(++num_ngx, server_samples->GetCount(2));
EXPECT_EQ(num_pss, server_samples->GetCount(3));
EXPECT_EQ(num_other, server_samples->GetCount(4));
EXPECT_EQ(num_bucket_1, version_samples->GetCount(1));
EXPECT_EQ(num_bucket_30, version_samples->GetCount(30));
EXPECT_EQ(++num_bucket_33, version_samples->GetCount(33)); // +1 for #33
headers->RemoveHeader("X-Page-Speed");
// X-Page-Speed header in PageSpeed Service format.
headers->AddHeader("X-Page-Speed: 97_4_bo");
RecordMetrics(content::RESOURCE_TYPE_MAIN_FRAME, url, headers.get());
server_samples = server_histogram->SnapshotSamples();
version_samples = version_histogram->SnapshotSamples();
EXPECT_EQ(++num_responses, server_samples->GetCount(0));
EXPECT_EQ(num_mps, server_samples->GetCount(1)); // no change
EXPECT_EQ(num_ngx, server_samples->GetCount(2));
EXPECT_EQ(++num_pss, server_samples->GetCount(3)); // +1 for PSS
EXPECT_EQ(num_other, server_samples->GetCount(4));
EXPECT_EQ(num_bucket_1, version_samples->GetCount(1));
EXPECT_EQ(num_bucket_30, version_samples->GetCount(30));
EXPECT_EQ(num_bucket_33, version_samples->GetCount(33));
headers->RemoveHeader("X-Page-Speed");
// X-Page-Speed header in an unrecognized format (IISpeed in this case).
headers->AddHeader("X-Page-Speed: 1.0PS1.2-20130615");
RecordMetrics(content::RESOURCE_TYPE_MAIN_FRAME, url, headers.get());
server_samples = server_histogram->SnapshotSamples();
version_samples = version_histogram->SnapshotSamples();
EXPECT_EQ(++num_responses, server_samples->GetCount(0));
EXPECT_EQ(num_mps, server_samples->GetCount(1)); // no change
EXPECT_EQ(num_pss, server_samples->GetCount(3));
EXPECT_EQ(++num_other, server_samples->GetCount(4)); // +1 for 'other'
EXPECT_EQ(num_bucket_1, version_samples->GetCount(1));
EXPECT_EQ(num_bucket_30, version_samples->GetCount(30));
EXPECT_EQ(num_bucket_33, version_samples->GetCount(33));
// Not a main frame => not counted at all.
RecordMetrics(content::RESOURCE_TYPE_SUB_FRAME, url, headers.get());
server_samples = server_histogram->SnapshotSamples();
version_samples = version_histogram->SnapshotSamples();
EXPECT_EQ(num_responses, server_samples->GetCount(0));
EXPECT_EQ(num_mps, server_samples->GetCount(1));
EXPECT_EQ(num_ngx, server_samples->GetCount(2));
EXPECT_EQ(num_pss, server_samples->GetCount(3));
EXPECT_EQ(num_other, server_samples->GetCount(4));
EXPECT_EQ(num_bucket_1, version_samples->GetCount(1));
EXPECT_EQ(num_bucket_30, version_samples->GetCount(30));
EXPECT_EQ(num_bucket_33, version_samples->GetCount(33));
// Not a http/https URL => not counted at all.
GURL data_url("data:image/png;base64,yadda yadda==");
RecordMetrics(content::RESOURCE_TYPE_MAIN_FRAME, data_url, headers.get());
server_samples = server_histogram->SnapshotSamples();
version_samples = version_histogram->SnapshotSamples();
EXPECT_EQ(num_responses, server_samples->GetCount(0));
EXPECT_EQ(num_mps, server_samples->GetCount(1));
EXPECT_EQ(num_ngx, server_samples->GetCount(2));
EXPECT_EQ(num_pss, server_samples->GetCount(3));
EXPECT_EQ(num_other, server_samples->GetCount(4));
EXPECT_EQ(num_bucket_1, version_samples->GetCount(1));
EXPECT_EQ(num_bucket_30, version_samples->GetCount(30));
EXPECT_EQ(num_bucket_33, version_samples->GetCount(33));
headers->RemoveHeader("X-Page-Speed");
}
} // namespace mod_pagespeed
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