1/* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17package androidx.appcompat.widget; 18 19import static org.junit.Assert.assertFalse; 20import static org.junit.Assert.assertTrue; 21 22import android.content.res.Resources; 23import android.graphics.drawable.Drawable; 24import android.support.test.filters.SmallTest; 25import android.support.test.rule.ActivityTestRule; 26import android.support.test.runner.AndroidJUnit4; 27 28import androidx.appcompat.app.AppCompatActivity; 29 30import org.junit.Rule; 31import org.junit.Test; 32import org.junit.runner.RunWith; 33 34@SmallTest 35@RunWith(AndroidJUnit4.class) 36public class TintResourcesTest { 37 @Rule 38 public final ActivityTestRule<AppCompatActivity> mActivityTestRule = 39 new ActivityTestRule<>(AppCompatActivity.class); 40 41 @Test 42 public void testTintResourcesDelegateBackToOriginalResources() { 43 final TestResources testResources = 44 new TestResources(mActivityTestRule.getActivity().getResources()); 45 // First make sure that the flag is false 46 assertFalse(testResources.wasGetDrawableCalled()); 47 48 // Now wrap in a TintResources instance and get a Drawable 49 final Resources tintResources = 50 new TintResources(mActivityTestRule.getActivity(), testResources); 51 tintResources.getDrawable(android.R.drawable.ic_delete); 52 53 // ...and assert that the flag was flipped 54 assertTrue(testResources.wasGetDrawableCalled()); 55 } 56 57 /** 58 * Special Resources class which returns a known Drawable instance from a special ID 59 */ 60 private static class TestResources extends Resources { 61 private boolean mGetDrawableCalled; 62 63 public TestResources(Resources res) { 64 super(res.getAssets(), res.getDisplayMetrics(), res.getConfiguration()); 65 } 66 67 @Override 68 public Drawable getDrawable(int id) throws NotFoundException { 69 mGetDrawableCalled = true; 70 return super.getDrawable(id); 71 } 72 73 public boolean wasGetDrawableCalled() { 74 return mGetDrawableCalled; 75 } 76 } 77 78} 79