chromium/components/optimization_guide/core/noisy_metrics_recorder_unittest.cc

// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/optimization_guide/core/noisy_metrics_recorder.h"

#include <cmath>

#include "base/check_op.h"
#include "base/logging.h"
#include "base/rand_util.h"
#include "testing/gtest/include/gtest/gtest.h"

// Tests that the original metric is returned as it is when the bit flip
// probability is set to 0.
TEST(NoisyMetricsRecorderTest, BasicsNoNoise) { … }

// Tests that the original metric is within the expected bounds.
TEST(NoisyMetricsRecorderTest, RandomNoise) { … }

// TestNoisyMetricsRecorder returns deterministic random number based on how
// it's configured.
class TestNoisyMetricsRecorder : public NoisyMetricsRecorder { … };

TEST(NoisyMetricsRecorderTest, All0s) { … }

TEST(NoisyMetricsRecorderTest, All1s) { … }

// Tests that the flipped return value matches the expected value. The noise is
// added deterministically using TestNoisyMetricsRecorder.
TEST(NoisyMetricsRecorderTest, AlternateBits) { … }