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 android.support.v7.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; 27import android.support.v7.app.AppCompatActivity; 28 29import org.junit.Rule; 30import org.junit.Test; 31import org.junit.runner.RunWith; 32 33@SmallTest 34@RunWith(AndroidJUnit4.class) 35public class TintResourcesTest { 36 @Rule 37 public final ActivityTestRule<AppCompatActivity> mActivityTestRule = 38 new ActivityTestRule<>(AppCompatActivity.class); 39 40 @Test 41 public void testTintResourcesDelegateBackToOriginalResources() { 42 final TestResources testResources = 43 new TestResources(mActivityTestRule.getActivity().getResources()); 44 // First make sure that the flag is false 45 assertFalse(testResources.wasGetDrawableCalled()); 46 47 // Now wrap in a TintResources instance and get a Drawable 48 final Resources tintResources = 49 new TintResources(mActivityTestRule.getActivity(), testResources); 50 tintResources.getDrawable(android.R.drawable.ic_delete); 51 52 // ...and assert that the flag was flipped 53 assertTrue(testResources.wasGetDrawableCalled()); 54 } 55 56 /** 57 * Special Resources class which returns a known Drawable instance from a special ID 58 */ 59 private static class TestResources extends Resources { 60 private boolean mGetDrawableCalled; 61 62 public TestResources(Resources res) { 63 super(res.getAssets(), res.getDisplayMetrics(), res.getConfiguration()); 64 } 65 66 @Override 67 public Drawable getDrawable(int id) throws NotFoundException { 68 mGetDrawableCalled = true; 69 return super.getDrawable(id); 70 } 71 72 public boolean wasGetDrawableCalled() { 73 return mGetDrawableCalled; 74 } 75 } 76 77} 78