material-components_material-components-android/tests/javatests/com/google/android/material/testutils/TestDrawable.java

/*
 * 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 com.google.android.material.testutils;

import android.graphics.drawable.GradientDrawable;
import androidx.annotation.ColorInt;

/**
 * Custom drawable class that provides a reliable way for testing various tinting scenarios across a
 * range of platform versions. ColorDrawable doesn't support tinting on Kitkat and below, and
 * BitmapDrawable (PNG sources) appears to slightly alter green and blue channels by a few units on
 * some of the older platform versions (Gingerbread). Using GradientDrawable allows doing reliable
 * tests at the level of individual channels (alpha / red / green / blue) for tinted and untinted
 * icons in the testIconTinting method.
 */
public class TestDrawable extends GradientDrawable {
  private int width;
  private int height;

  public TestDrawable(@ColorInt int color, int width, int height) {
    super(Orientation.TOP_BOTTOM, new int[] {color, color});
    this.width = width;
    this.height = height;
  }

  @Override
  public int getIntrinsicWidth() {
    return width;
  }

  @Override
  public int getIntrinsicHeight() {
    return height;
  }
}