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/*
* 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 com.android.setupwizardlib.test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.support.test.InstrumentationRegistry;
import android.support.test.filters.SmallTest;
import android.support.test.runner.AndroidJUnit4;
import android.view.View;
import android.view.ViewGroup;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import com.android.setupwizardlib.DividerItemDecoration;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(AndroidJUnit4.class)
@SmallTest
public class DividerItemDecorationTest {
@Test
public void testDivider() {
final DividerItemDecoration decoration = new DividerItemDecoration();
Drawable divider = new ColorDrawable();
decoration.setDivider(divider);
assertSame("Divider should be same as set", divider, decoration.getDivider());
}
@Test
public void testDividerHeight() {
final DividerItemDecoration decoration = new DividerItemDecoration();
decoration.setDividerHeight(123);
assertEquals("Divider height should be 123", 123, decoration.getDividerHeight());
}
@Test
public void testShouldDrawDividerBelowWithEitherCondition() {
// Set up the item decoration, with 1px red divider line
final DividerItemDecoration decoration = new DividerItemDecoration();
Drawable divider = new ColorDrawable(Color.RED);
decoration.setDivider(divider);
decoration.setDividerHeight(1);
Bitmap bitmap = drawDecoration(decoration, true, true);
// Draw the expected result on a bitmap
Bitmap expectedBitmap = Bitmap.createBitmap(20, 20, Bitmap.Config.ARGB_4444);
Canvas expectedCanvas = new Canvas(expectedBitmap);
Paint paint = new Paint();
paint.setColor(Color.RED);
expectedCanvas.drawRect(0, 5, 20, 6, paint);
expectedCanvas.drawRect(0, 10, 20, 11, paint);
expectedCanvas.drawRect(0, 15, 20, 16, paint);
// Compare the two bitmaps
assertBitmapEquals(expectedBitmap, bitmap);
bitmap.recycle();
bitmap = drawDecoration(decoration, false, true);
// should still be the same.
assertBitmapEquals(expectedBitmap, bitmap);
bitmap.recycle();
bitmap = drawDecoration(decoration, true, false);
// last item should not have a divider below it now
paint.setColor(Color.TRANSPARENT);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
expectedCanvas.drawRect(0, 15, 20, 16, paint);
assertBitmapEquals(expectedBitmap, bitmap);
bitmap.recycle();
bitmap = drawDecoration(decoration, false, false);
// everything should be transparent now
expectedCanvas.drawRect(0, 5, 20, 6, paint);
expectedCanvas.drawRect(0, 10, 20, 11, paint);
assertBitmapEquals(expectedBitmap, bitmap);
}
@Test
public void testShouldDrawDividerBelowWithBothCondition() {
// Set up the item decoration, with 1px green divider line
final DividerItemDecoration decoration = new DividerItemDecoration();
Drawable divider = new ColorDrawable(Color.GREEN);
decoration.setDivider(divider);
decoration.setDividerHeight(1);
decoration.setDividerCondition(DividerItemDecoration.DIVIDER_CONDITION_BOTH);
Bitmap bitmap = drawDecoration(decoration, true, true);
Paint paint = new Paint();
paint.setColor(Color.GREEN);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.ADD));
Bitmap expectedBitmap = Bitmap.createBitmap(20, 20, Bitmap.Config.ARGB_4444);
Canvas expectedCanvas = new Canvas(expectedBitmap);
expectedCanvas.drawRect(0, 5, 20, 6, paint);
expectedCanvas.drawRect(0, 10, 20, 11, paint);
expectedCanvas.drawRect(0, 15, 20, 16, paint);
// Should have all the dividers
assertBitmapEquals(expectedBitmap, bitmap);
bitmap.recycle();
bitmap = drawDecoration(decoration, false, true);
paint.setColor(Color.TRANSPARENT);
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
expectedCanvas.drawRect(0, 5, 20, 6, paint);
expectedCanvas.drawRect(0, 10, 20, 11, paint);
assertBitmapEquals(expectedBitmap, bitmap);
bitmap.recycle();
bitmap = drawDecoration(decoration, true, false);
// nothing should be drawn now.
expectedCanvas.drawRect(0, 15, 20, 16, paint);
assertBitmapEquals(expectedBitmap, bitmap);
bitmap.recycle();
bitmap = drawDecoration(decoration, false, false);
assertBitmapEquals(expectedBitmap, bitmap);
}
private Bitmap drawDecoration(DividerItemDecoration decoration, final boolean allowDividerAbove,
final boolean allowDividerBelow) {
// Set up the canvas to be drawn
Bitmap bitmap = Bitmap.createBitmap(20, 20, Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(bitmap);
final Context context = InstrumentationRegistry.getContext();
// Set up recycler view with vertical linear layout manager
RecyclerView testRecyclerView = new RecyclerView(context);
testRecyclerView.setLayoutManager(new LinearLayoutManager(context));
// Set up adapter with 3 items, each 5px tall
testRecyclerView.setAdapter(new RecyclerView.Adapter() {
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
final View itemView = new View(context);
itemView.setMinimumWidth(20);
itemView.setMinimumHeight(5);
return ViewHolder.createInstance(itemView, allowDividerAbove, allowDividerBelow);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int i) {
}
@Override
public int getItemCount() {
return 3;
}
});
testRecyclerView.layout(0, 0, 20, 20);
decoration.onDraw(canvas, testRecyclerView, null);
return bitmap;
}
private void assertBitmapEquals(Bitmap expected, Bitmap actual) {
assertEquals("Width should be the same", expected.getWidth(), actual.getWidth());
assertEquals("Height should be the same", expected.getHeight(), actual.getHeight());
for (int x = 0; x < expected.getWidth(); x++) {
for (int y = 0; y < expected.getHeight(); y++) {
assertEquals("Pixel at (" + x + ", " + y + ") should be the same",
expected.getPixel(x, y), actual.getPixel(x, y));
}
}
}
private static class ViewHolder extends RecyclerView.ViewHolder
implements DividerItemDecoration.DividedViewHolder {
private boolean mAllowDividerAbove;
private boolean mAllowDividerBelow;
public static ViewHolder createInstance(View itemView, boolean allowDividerAbove,
boolean allowDividerBelow) {
return new ViewHolder(itemView, allowDividerAbove, allowDividerBelow);
}
private ViewHolder(View itemView, boolean allowDividerAbove, boolean allowDividerBelow) {
super(itemView);
mAllowDividerAbove = allowDividerAbove;
mAllowDividerBelow = allowDividerBelow;
}
@Override
public boolean isDividerAllowedAbove() {
return mAllowDividerAbove;
}
@Override
public boolean isDividerAllowedBelow() {
return mAllowDividerBelow;
}
}
}
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