1 /* 2 * Copyright (C) 2021 The Dagger Authors. 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 17 package dagger.hilt.android.internal.managers; 18 19 import static com.google.common.truth.Truth.assertThat; 20 import static org.junit.Assert.assertThrows; 21 22 import androidx.lifecycle.Lifecycle; 23 import android.os.Build; 24 import androidx.fragment.app.Fragment; 25 import androidx.fragment.app.FragmentActivity; 26 import androidx.test.core.app.ActivityScenario; 27 import androidx.test.ext.junit.runners.AndroidJUnit4; 28 import dagger.hilt.android.AndroidEntryPoint; 29 import dagger.hilt.android.internal.managers.ViewComponentManager.FragmentContextWrapper; 30 import dagger.hilt.android.testing.HiltAndroidRule; 31 import dagger.hilt.android.testing.HiltAndroidTest; 32 import dagger.hilt.android.testing.HiltTestApplication; 33 import org.junit.Rule; 34 import org.junit.Test; 35 import org.junit.runner.RunWith; 36 import org.robolectric.annotation.Config; 37 38 @HiltAndroidTest 39 @RunWith(AndroidJUnit4.class) 40 // Robolectric requires Java9 to run API 29 and above, so use API 28 instead 41 @Config(sdk = Build.VERSION_CODES.P, application = HiltTestApplication.class) 42 public final class FragmentContextWrapperLeakTest { 43 /** An activity to test injection. */ 44 @AndroidEntryPoint(FragmentActivity.class) 45 public static final class TestActivity extends Hilt_FragmentContextWrapperLeakTest_TestActivity {} 46 47 /** A fragment to test injection. */ 48 @AndroidEntryPoint(Fragment.class) 49 public static final class TestFragment extends Hilt_FragmentContextWrapperLeakTest_TestFragment {} 50 51 @Rule public HiltAndroidRule hiltRule = new HiltAndroidRule(this); 52 53 @Test testFragmentContextWrapperDoesNotLeakFragment()54 public void testFragmentContextWrapperDoesNotLeakFragment() { 55 try (ActivityScenario<TestActivity> scenario = ActivityScenario.launch(TestActivity.class)) { 56 TestFragment fragment = new TestFragment(); 57 scenario.onActivity( 58 activity -> 59 activity 60 .getSupportFragmentManager() 61 .beginTransaction() 62 .add(fragment, "TestFragment") 63 .commitNow()); 64 65 FragmentContextWrapper fragmentContextWrapper = 66 (FragmentContextWrapper) fragment.getContext(); 67 assertThat(fragmentContextWrapper.getFragment()).isEqualTo(fragment); 68 scenario.moveToState(Lifecycle.State.DESTROYED); 69 NullPointerException exception = 70 assertThrows(NullPointerException.class, fragmentContextWrapper::getFragment); 71 assertThat(exception).hasMessageThat().contains("The fragment has already been destroyed"); 72 } 73 } 74 } 75