bin/media/audio_core/test/audio_fidl_tests_shared.h

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef GARNET_BIN_MEDIA_AUDIO_CORE_TEST_AUDIO_FIDL_TESTS_SHARED_H_
#define GARNET_BIN_MEDIA_AUDIO_CORE_TEST_AUDIO_FIDL_TESTS_SHARED_H_

#include <fuchsia/media/cpp/fidl.h>

namespace media {
namespace audio {
namespace test {

// For operations expected to complete, wait five seconds to avoid flaky test
// behavior in high-load (high-latency) test environments. For reference, today
// on highly-loaded QEMU instances we see timeouts if we wait 20 ms, but not if
// we wait 50 ms. This value is a full 100x that value, so shouldn't be flaky.
//
// Conversely, when we DO expect a timeout, wait 50 ms (normal response is <5
// ms, usually <1). These values codify the following ordered priorities:
// 1) False-positive test failures are expensive and must be eliminated;
// 2) Having satisfying #1, streamline test-run-time (time=resources=cost);
// 3) Minimize false-negative test outcomes (undetected regressions).
//
// Finally, when waiting for a timeout, our granularity (how frequently we check
// for response) can be coarse, but when expecting a response we can save time
// by checking more frequently than the default 10 ms. The kDurationGranularity
// constant should only be used in conjunction with kDurationResponseExpected.
//
constexpr zx::duration kDurationResponseExpected = zx::sec(5);
constexpr zx::duration kDurationTimeoutExpected = zx::msec(50);
constexpr zx::duration kDurationGranularity = zx::msec(1);

constexpr char kConnectionErr[] =
    "Connection to fuchsia.media FIDL interface was lost!\n";
constexpr char kTimeoutErr[] = "Timeout -- no callback received!\n";
constexpr char kNoTimeoutErr[] = "Unexpected callback received!\n";

constexpr float kUnityGainDb = 0.0f;
constexpr float kTooLowGainDb = fuchsia::media::MUTED_GAIN_DB - 0.1f;
constexpr float kTooHighGainDb = fuchsia::media::MAX_GAIN_DB + 0.1f;

}  // namespace test
}  // namespace audio
}  // namespace media

#endif  // GARNET_BIN_MEDIA_AUDIO_CORE_TEST_AUDIO_FIDL_TESTS_SHARED_H_