androidx/leanback/graphics/FitWidthBitmapDrawableTest.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 androidx.leanback.graphics;

import static org.junit.Assert.assertEquals;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.verify;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Build;
import android.support.test.filters.MediumTest;
import android.support.test.filters.SdkSuppress;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;

/**
 * Unit test for {@link FitWidthBitmapDrawable}
 */
@RunWith(AndroidJUnit4.class)
public class FitWidthBitmapDrawableTest {
    private final static int SCREEN_WIDTH = 1600;
    private final static int SCREEN_HEIGHT = 1080;
    private final static int WIDTH = 300;
    private final static int HEIGHT = 600;
    private Bitmap bitmap = Bitmap.createBitmap(WIDTH, HEIGHT, Bitmap.Config.ARGB_8888);

    @MediumTest
    @Test
    public void draw_withOffset() {
        int offset = 600;
        FitWidthBitmapDrawable drawable = new FitWidthBitmapDrawable();
        drawable.setBitmap(bitmap);
        drawable.setVerticalOffset(offset);
        Rect bounds = new Rect(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
        drawable.setBounds(bounds);

        Canvas canvas = Mockito.mock(Canvas.class);
        drawable.draw(canvas);

        Rect expectedBounds = bounds;
        verify(canvas).clipRect(expectedBounds);

        Rect bitmapBounds = new Rect(0, 0, WIDTH, HEIGHT);
        int nH = (int) (((float)SCREEN_WIDTH/WIDTH * HEIGHT) + offset);
        Rect expectedDest = new Rect(0, offset, SCREEN_WIDTH, nH);
        verify(canvas).drawBitmap(eq(bitmap), eq(bitmapBounds), eq(expectedDest), any(Paint.class));
    }

    @SmallTest
    @SdkSuppress(minSdkVersion = Build.VERSION_CODES.KITKAT)
    @Test
    public void constantState() {
        FitWidthBitmapDrawable drawable = new FitWidthBitmapDrawable();
        drawable.setBitmap(bitmap);
        drawable.setVerticalOffset(600);

        // getConstantState().newDrawable() will create a new drawable with shared states:
        FitWidthBitmapDrawable drawable2 = (FitWidthBitmapDrawable)
                drawable.getConstantState().newDrawable();
        drawable.setAlpha(128);
        assertEquals(128, drawable2.getAlpha());

        // after mutate(), drawable2 will have its own state
        drawable2.mutate();
        drawable.setAlpha(64);
        assertEquals(64, drawable.getAlpha());
        assertEquals(128, drawable2.getAlpha());
    }
}