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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settingslib.display;
import static com.android.settingslib.display.BrightnessUtils.GAMMA_SPACE_MAX;
import static com.android.settingslib.display.BrightnessUtils.GAMMA_SPACE_MIN;
import static com.google.common.truth.Truth.assertThat;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.robolectric.RobolectricTestRunner;
@RunWith(RobolectricTestRunner.class)
public class BrightnessUtilsTest {
private static final int MIN_INT = 1;
private static final int MAX_INT = 255;
private static final float MIN_FLOAT = 0.0f;
private static final float MAX_FLOAT = 1.0f;
@Test
public void linearToGamma_minValue_shouldReturnMin() {
assertThat(BrightnessUtils.convertLinearToGamma(MIN_INT, MIN_INT, MAX_INT))
.isEqualTo(GAMMA_SPACE_MIN);
assertThat(BrightnessUtils.convertLinearToGammaFloat(MIN_FLOAT, MIN_FLOAT, MAX_FLOAT))
.isEqualTo(GAMMA_SPACE_MIN);
}
@Test
public void linearToGamma_maxValue_shouldReturnGammaSpaceMax() {
assertThat(BrightnessUtils.convertLinearToGamma(MAX_INT, MIN_INT, MAX_INT))
.isEqualTo(GAMMA_SPACE_MAX);
assertThat(BrightnessUtils.convertLinearToGammaFloat(MAX_FLOAT, MIN_FLOAT, MAX_FLOAT))
.isEqualTo(GAMMA_SPACE_MAX);
}
@Test
public void gammaToLinear_minValue_shouldReturnMin() {
assertThat(BrightnessUtils.convertGammaToLinear(GAMMA_SPACE_MIN, MIN_INT, MAX_INT))
.isEqualTo(MIN_INT);
assertThat(BrightnessUtils.convertGammaToLinearFloat(GAMMA_SPACE_MIN, MIN_FLOAT, MAX_FLOAT))
.isEqualTo(MIN_FLOAT);
}
@Test
public void gammaToLinear_gammaSpaceValue_shouldReturnMax() {
assertThat(BrightnessUtils.convertGammaToLinear(GAMMA_SPACE_MAX, MIN_INT, MAX_INT))
.isEqualTo(MAX_INT);
assertThat(BrightnessUtils.convertGammaToLinearFloat(GAMMA_SPACE_MAX, MIN_FLOAT, MAX_FLOAT))
.isEqualTo(MAX_FLOAT);
}
}
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