1 /* 2 * Copyright (C) 2016 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.android.support; 18 19 import static com.google.common.truth.Truth.assertThat; 20 import static org.junit.Assert.fail; 21 22 import android.app.Application; 23 import android.os.Build; 24 import androidx.fragment.app.Fragment; 25 import androidx.fragment.app.FragmentActivity; 26 import androidx.test.ext.junit.runners.AndroidJUnit4; 27 import dagger.android.AndroidInjector; 28 import dagger.android.HasAndroidInjector; 29 import org.junit.Test; 30 import org.junit.runner.RunWith; 31 import org.robolectric.Robolectric; 32 import org.robolectric.annotation.Config; 33 34 @RunWith(AndroidJUnit4.class) 35 // Robolectric requires Java9 to run API 29 and above, so use API 28 instead 36 @Config(sdk = Build.VERSION_CODES.P) 37 public final class AndroidSupportInjectionTest { 38 @Test injectFragment_simpleApplication()39 public void injectFragment_simpleApplication() { 40 Fragment fragment = new Fragment(); 41 startFragment(fragment); 42 43 try { 44 AndroidSupportInjection.inject(fragment); 45 fail(); 46 } catch (Exception e) { 47 assertThat(e).hasMessageThat().contains("No injector was found"); 48 } 49 } 50 51 private static class ApplicationReturnsNull extends Application 52 implements HasAndroidInjector { 53 @Override androidInjector()54 public AndroidInjector<Object> androidInjector() { 55 return null; 56 } 57 } 58 59 @Test 60 @Config(application = ApplicationReturnsNull.class) fragmentInjector_returnsNull()61 public void fragmentInjector_returnsNull() { 62 Fragment fragment = new Fragment(); 63 startFragment(fragment); 64 65 try { 66 AndroidSupportInjection.inject(fragment); 67 fail(); 68 } catch (Exception e) { 69 assertThat(e).hasMessageThat().contains("androidInjector() returned null"); 70 } 71 } 72 73 @Test injectFragment_nullInput()74 public void injectFragment_nullInput() { 75 try { 76 AndroidSupportInjection.inject(null); 77 fail(); 78 } catch (NullPointerException e) { 79 assertThat(e).hasMessageThat().contains("fragment"); 80 } 81 } 82 startFragment(Fragment fragment)83 void startFragment(Fragment fragment) { 84 Robolectric.setupActivity(FragmentActivity.class) 85 .getSupportFragmentManager() 86 .beginTransaction() 87 .add(fragment, "") 88 .commitNow(); 89 } 90 } 91