Implement ImageRevealHelperTest to test reveal state

/*

 * Copyright (C) 2019 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.systemui.glwallpaper;

import static com.google.common.truth.Truth.assertThat;

import android.testing.AndroidTestingRunner;

import android.testing.TestableLooper;

import androidx.test.filters.SmallTest;

import com.android.systemui.SysuiTestCase;

import org.junit.Before;

import org.junit.Test;

import org.junit.runner.RunWith;

@SmallTest

@RunWith(AndroidTestingRunner.class)

@TestableLooper.RunWithLooper

public class ImageRevealHelperTest extends SysuiTestCase {

    static final int ANIMATION_DURATION = 500;

    ImageRevealHelper mImageRevealHelper;

    ImageRevealHelper.RevealStateListener mRevealStateListener;

    @Before

    public void setUp() throws Exception {

        mRevealStateListener = new ImageRevealHelper.RevealStateListener() {

            @Override

            public void onRevealStateChanged() {

                // no-op

            }

            @Override

            public void onRevealStart(boolean animate) {

                // no-op

            }

            @Override

            public void onRevealEnd() {

                // no-op

            }

        };

        mImageRevealHelper = new ImageRevealHelper(mRevealStateListener);

    }

    @Test

    public void testBiometricAuthUnlockAnimateImageRevealState_shouldNotBlackoutScreen() {

        assertThat(mImageRevealHelper.getReveal()).isEqualTo(0f);

        mImageRevealHelper.updateAwake(true /* awake */, ANIMATION_DURATION);

        assertThat(mImageRevealHelper.getReveal()).isEqualTo(0f);

        // When device unlock through Biometric, should not show reveal transition

        mImageRevealHelper.updateAwake(false /* awake */, 0);

        assertThat(mImageRevealHelper.getReveal()).isEqualTo(1f);

    }

}