tests/tests/uirendering/src/android/uirendering/cts/testclasses/ShadowTests.java

/*
 * Copyright (C) 2015 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 android.uirendering.cts.testclasses;

import android.graphics.Color;
import android.graphics.Point;
import android.test.suitebuilder.annotation.MediumTest;
import android.uirendering.cts.bitmapverifiers.SamplePointVerifier;

import android.uirendering.cts.R;

import android.uirendering.cts.testinfrastructure.ActivityTestBase;
import android.uirendering.cts.util.CompareUtils;
import org.junit.Test;

@MediumTest
public class ShadowTests extends ActivityTestBase {

    private class GrayScaleVerifier extends SamplePointVerifier {
        public GrayScaleVerifier(Point[] testPoints, int[] expectedColors, int tolerance) {
            super(testPoints, expectedColors, tolerance) ;
        }

        @Override
        protected boolean verifyPixel(int color, int expectedColor) {
            return super.verifyPixel(color, expectedColor)
                    && CompareUtils.verifyPixelGrayScale(color, 1);
        }
    }

    @Test
    public void testShadowLayout() {
        int shadowColorValue = 0xDB;
        // Android TV theme overrides shadow opacity to be darker.
        if (getActivity().getOnTv()) {
            shadowColorValue = 0xBB;
        }

        // Use a higher threshold than default value (20), since we also double check gray scale;
        GrayScaleVerifier verifier = new GrayScaleVerifier(
                new Point[] {
                        // view area
                        new Point(25, 64),
                        new Point(64, 64),
                        // shadow area
                        new Point(25, 65),
                        new Point(64, 65)
                },
                new int[] {
                        Color.WHITE,
                        Color.WHITE,
                        Color.rgb(shadowColorValue, shadowColorValue, shadowColorValue),
                        Color.rgb(shadowColorValue, shadowColorValue, shadowColorValue),
                },
                48);

        createTest()
                .addLayout(R.layout.simple_shadow_layout, null, true/* HW only */)
                .runWithVerifier(verifier);
    }
}