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Diffstat (limited to 'tests/audio/test_audio.cpp')
| -rw-r--r-- | tests/audio/test_audio.cpp | 118 | 
1 files changed, 118 insertions, 0 deletions
| diff --git a/tests/audio/test_audio.cpp b/tests/audio/test_audio.cpp new file mode 100644 index 0000000000..ef34748b06 --- /dev/null +++ b/tests/audio/test_audio.cpp @@ -0,0 +1,118 @@ +// Copyright 2023 Google LLC +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 2 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program.  If not, see <http://www.gnu.org/licenses/>. + +#include <cmath> +#include <random> + +#include "gtest/gtest.h" +#include "keyboard_report_util.hpp" +#include "test_common.hpp" + +namespace { + +class AudioTest : public TestFixture { +   public: +    uint16_t infer_tempo() { +        return audio_ms_to_duration(1875) / 2; +    } +}; + +TEST_F(AudioTest, OnOffToggle) { +    audio_on(); +    EXPECT_TRUE(audio_is_on()); + +    audio_off(); +    EXPECT_FALSE(audio_is_on()); + +    audio_toggle(); +    EXPECT_TRUE(audio_is_on()); + +    audio_toggle(); +    EXPECT_FALSE(audio_is_on()); +} + +TEST_F(AudioTest, ChangeTempo) { +    for (int tempo = 50; tempo <= 250; tempo += 50) { +        audio_set_tempo(tempo); +        EXPECT_EQ(infer_tempo(), tempo); +    } + +    audio_set_tempo(10); +    audio_increase_tempo(25); +    EXPECT_EQ(infer_tempo(), 35); + +    audio_decrease_tempo(4); +    EXPECT_EQ(infer_tempo(), 31); + +    audio_increase_tempo(250); +    EXPECT_EQ(infer_tempo(), 255); + +    audio_set_tempo(9); +    EXPECT_EQ(infer_tempo(), 10); + +    audio_decrease_tempo(100); +    EXPECT_EQ(infer_tempo(), 10); +} + +TEST_F(AudioTest, BpmConversion) { +    const int tol = 1; + +    audio_set_tempo(120); +    // At 120 bpm, there are 2 beats per second, and a whole note is 500 ms. +    EXPECT_NEAR(audio_duration_to_ms(64 /* whole note */), 500, tol); +    EXPECT_NEAR(audio_ms_to_duration(500), 64, tol); +    EXPECT_EQ(audio_duration_to_ms(0), 0); +    EXPECT_EQ(audio_ms_to_duration(0), 0); + +    audio_set_tempo(10); +    // At 10 bpm, UINT16_MAX ms corresponds to 699/64 beats and is the longest +    // duration that can be converted without overflow. +    EXPECT_NEAR(audio_ms_to_duration(UINT16_MAX), 699, tol); +    EXPECT_NEAR(audio_duration_to_ms(699), 65531, tol); + +    audio_set_tempo(255); +    // At 255 bpm, UINT16_MAX ms corresponds to 17825/64 beats and is the longest +    // duration that can be converted without overflow. +    EXPECT_NEAR(audio_ms_to_duration(UINT16_MAX), 17825, tol); +    EXPECT_NEAR(audio_duration_to_ms(17825), 65533, tol); + +    std::mt19937                       rng(0 /*seed*/); +    std::uniform_int_distribution<int> dist_tempo(10, 255); +    std::uniform_int_distribution<int> dist_ms(0, UINT16_MAX); + +    // Test bpm <-> ms conversions for random tempos and durations. +    for (int trial = 0; trial < 50; ++trial) { +        const int tempo       = dist_tempo(rng); +        const int duration_ms = dist_ms(rng); +        SCOPED_TRACE("tempo " + testing::PrintToString(tempo) + ", duration " + testing::PrintToString(duration_ms) + " ms"); + +        audio_set_tempo(tempo); +        int duration_bpm = std::round((64.0f / (60.0f * 1000.0f)) * duration_ms * tempo); +        ASSERT_NEAR(audio_ms_to_duration(duration_ms), duration_bpm, tol); + +        int roundtrip_ms = std::round((60.0f * 1000.0f / 64.0f) * duration_bpm / tempo); +        // Because of round-off error, duration_ms and roundtrip_ms may differ by +        // about (60 * 1000 / 64) / tempo. +        int roundtrip_tol = tol * (60.0f * 1000.0f / 64.0f) / tempo; +        ASSERT_NEAR(roundtrip_ms, duration_ms, roundtrip_tol); + +        // Only test converting back to ms if the result would be in uint16_t range. +        if (roundtrip_ms <= UINT16_MAX) { +            ASSERT_NEAR(audio_duration_to_ms(duration_bpm), roundtrip_ms, tol); +        } +    } +} + +} // namespace | 
