content: /*
   * Copyright (C) 2016 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.test.espresso.matcher;
  
  import android.graphics.Bitmap;
  import android.graphics.BitmapFactory;
  import android.graphics.drawable.BitmapDrawable;
  import android.graphics.drawable.Drawable;
  import android.view.View;
  import org.hamcrest.Description;
  import org.hamcrest.TypeSafeMatcher;
  
  /**
   * Matcher to match {@link android.view.View} based on its background resource.
   */
  public final class HasBackgroundMatcher extends TypeSafeMatcher<View> {
  
    private static final String TAG = "HasBackgroundMatcher";
    private final int drawableId;
  
    public HasBackgroundMatcher(int drawableId) {
      this.drawableId = drawableId;
    }
  
    @Override
    protected boolean matchesSafely(View view) {
      return assertDrawable(view.getBackground(), drawableId, view);
    }
  
    @Override
    public void describeTo(Description description) {
      description.appendText("has background with drawable ID: " + drawableId);
    }
  
    private static boolean assertDrawable(Drawable actual, int expectedId, View v) {
      if (null == actual || !(actual instanceof BitmapDrawable)) {
        return false;
      }
  
      Bitmap expectedBitmap = null;
      try {
        expectedBitmap = BitmapFactory.decodeResource(v.getContext().getResources(), expectedId);
        return ((BitmapDrawable) actual).getBitmap().sameAs(expectedBitmap);
      } finally {
        if (expectedBitmap != null) {
          expectedBitmap.recycle();
          expectedBitmap = null;
        }
      }
    }
  }
  