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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/preloading/prerender/prerender_metrics.h"
#include "base/test/metrics/histogram_tester.h"
#include "content/public/browser/preloading_trigger_type.h"
#include "net/http/http_request_headers.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
namespace {
void TestHeaders(const std::string& prerender_header_str,
const std::string& potential_header_str) {
PrerenderCancellationReason reason = PrerenderCancellationReason::
CreateCandidateReasonForActivationParameterMismatch();
net::HttpRequestHeaders prerender_headers;
prerender_headers.AddHeadersFromString(prerender_header_str);
net::HttpRequestHeaders potential_headers;
potential_headers.AddHeadersFromString(potential_header_str);
ASSERT_FALSE(PrerenderHost::IsActivationHeaderMatch(
potential_headers, prerender_headers, reason));
reason.ReportMetrics(".ForTesting");
}
// Tests to ensure the ReportHeaderMismatch implementation is aligned with the
// enum generator.
TEST(PrerenderMetricsTest, NavigationHeaderMismatchMetric) {
const char kMetricName[] =
"Prerender.Experimental.ActivationHeadersMismatch.ForTesting";
{
base::HistogramTester histogram_tester;
TestHeaders("Content-Type: ab\r\n If-Match: xy",
"Content-Type: cd\r\n If-Match: xy");
// label="content-type: value mismatch"
histogram_tester.ExpectUniqueSample(kMetricName, 808179719, 1);
}
{
base::HistogramTester histogram_tester;
TestHeaders("Content-Type: ab", "Content-Type: ab\r\n If-Match: xys");
// label="if-match: missing in prerendering request's headers"
histogram_tester.ExpectUniqueSample(kMetricName, 667272509, 1);
}
{
base::HistogramTester histogram_tester;
TestHeaders("service-worker: xyz", "");
// label="service-worker: missing in activation request's headers"
histogram_tester.ExpectUniqueSample(kMetricName, -578377770, 1);
}
}
} // namespace
} // namespace content
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