chromium/components/page_load_metrics/renderer/fake_page_timing_sender.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PAGE_LOAD_METRICS_RENDERER_FAKE_PAGE_TIMING_SENDER_H_
#define COMPONENTS_PAGE_LOAD_METRICS_RENDERER_FAKE_PAGE_TIMING_SENDER_H_

#include <set>
#include <vector>

#include "base/memory/raw_ptr.h"
#include "components/page_load_metrics/common/page_load_metrics.mojom.h"
#include "components/page_load_metrics/common/page_load_timing.h"
#include "components/page_load_metrics/renderer/page_timing_sender.h"
#include "third_party/blink/public/common/use_counter/use_counter_feature.h"

namespace page_load_metrics {

// PageTimingSender implementation for use in tests. Allows for setting and
// verifying basic expectations when sending PageLoadTiming. By default,
// FakePageTimingSender will verify that expected and actual
// PageLoadTimings match on each invocation to ExpectPageLoadTiming() and
// SendTiming(), as well as in the destructor. Tests can force additional
// validations by calling VerifyExpectedTimings.
//
// Expected PageLoadTimings are specified via ExpectPageLoadTiming, and actual
// PageLoadTimings are dispatched through SendTiming(). When SendTiming() is
// called, we verify that the actual PageLoadTimings dipatched through
// SendTiming() match the expected PageLoadTimings provided via
// ExpectPageLoadTiming.
//
// Normally, gmock would be used in place of this class, but gmock is not
// compatible with structures that use aligned memory, and PageLoadTiming uses
// std::optional which uses aligned memory, so we're forced to roll
// our own implementation here. See
// https://groups.google.com/forum/#!topic/googletestframework/W-Hud3j_c6I for
// more details.
class FakePageTimingSender : public PageTimingSender { … };

}  // namespace page_load_metrics

#endif  // COMPONENTS_PAGE_LOAD_METRICS_RENDERER_FAKE_PAGE_TIMING_SENDER_H_