Add a test observing r8 behavior with HiltViewModel.

RELNOTES=n/a
PiperOrigin-RevId: 577986909

Author: wanyingd1996

javatests/artifacts/hilt-android/viewmodel/app/build.gradle

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+/*
+ * Copyright (C) 2023 The Dagger Authors.
+ *
+ * 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.
+ */
+
+plugins {
+    id 'com.android.application'
+    id 'com.google.dagger.hilt.android'
+}
+
+android {
+
+    namespace 'dagger.hilt.viewmodel'
+    compileSdkVersion 33
+    defaultConfig {
+        applicationId 'dagger.hilt.viewmodel'
+        minSdk 21
+        targetSdk 33
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        debug {
+            minifyEnabled true
+            shrinkResources true
+            proguardFiles getDefaultProguardFile(
+                    'proguard-android-optimize.txt'),
+                    'proguard-rules.pro'
+
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
+    }
+}
+
+dependencies {
+    implementation 'androidx.appcompat:appcompat:1.2.0'
+    implementation 'com.google.errorprone:error_prone_annotations:2.15.0'
+
+    androidTestImplementation 'androidx.test:core:1.5.0-alpha02'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
+    androidTestImplementation "androidx.test:runner:1.5.2"
+    androidTestImplementation "androidx.test:rules:1.5.0"
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+
+    // Hilt dependencies
+    implementation "com.google.dagger:hilt-android:$hilt_version"
+    annotationProcessor "com.google.dagger:hilt-compiler:$hilt_version"
+}

javatests/artifacts/hilt-android/viewmodel/app/proguard-rules.pro

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+-dontwarn com.google.errorprone.annotations.MustBeClosed
+-keep class kotlin.**

javatests/artifacts/hilt-android/viewmodel/app/src/androidTest/java/dagger/hilt/viewmodel/SimpleApplicationTest.java

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+/*
+ * Copyright (C) 2023 The Dagger Authors.
+ *
+ * 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 dagger.hilt.viewmodel;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.assertion.ViewAssertions.matches;
+import static androidx.test.espresso.matcher.ViewMatchers.withResourceName;
+import static androidx.test.espresso.matcher.ViewMatchers.withText;
+import static org.hamcrest.Matchers.startsWith;
+
+import android.content.Intent;
+import androidx.test.core.app.ActivityScenario;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class SimpleApplicationTest {
+    @Test
+    public void testHiltViewModelWithR8DoesNotCrash() {
+        Intent mainIntent =
+            new Intent(ApplicationProvider.getApplicationContext(), SimpleActivity.class);
+        try (ActivityScenario<SimpleActivity> scenario = ActivityScenario.launch(mainIntent)) {
+            onView(withResourceName("greeting"))
+                .check(matches(withText(startsWith("Hello"))));
+        }
+    }
+}

javatests/artifacts/hilt-android/viewmodel/app/src/main/AndroidManifest.xml

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+<!--
+  ~ Copyright (C) 2023 The Dagger Authors.
+  ~
+  ~ 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.
+  -->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+  <application android:name=".SimpleApplication" android:label="@string/appName">
+    <activity
+        android:name=".SimpleActivity"
+        android:theme="@style/Theme.AppCompat.Light"
+        android:exported="true">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN" />
+        <category android:name="android.intent.category.LAUNCHER" />
+      </intent-filter>
+    </activity>
+  </application>
+</manifest>

javatests/artifacts/hilt-android/viewmodel/app/src/main/java/dagger/hilt/viewmodel/SimpleActivity.java

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+/*
+ * Copyright (C) 2023 The Dagger Authors.
+ *
+ * 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 dagger.hilt.viewmodel;
+
+import android.os.Bundle;
+import android.widget.TextView;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.lifecycle.ViewModelProvider;
+import dagger.hilt.android.AndroidEntryPoint;
+
+/** The main activity of the application. */
+@AndroidEntryPoint
+public class SimpleActivity extends AppCompatActivity {
+  private static final String TAG = SimpleActivity.class.getSimpleName();
+
+  @Override
+  protected void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    SimpleViewModel viewModel = new ViewModelProvider(this).get(SimpleViewModel.class);
+
+    setContentView(R.layout.activity_main);
+
+    ((TextView) findViewById(R.id.greeting))
+        .setText(getResources().getString(R.string.welcome, viewModel.userName));
+  }
+}

javatests/artifacts/hilt-android/viewmodel/app/src/main/java/dagger/hilt/viewmodel/SimpleApplication.java

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+/*
+ * Copyright (C) 2023 The Dagger Authors.
+ *
+ * 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 dagger.hilt.viewmodel;
+
+import android.app.Application;
+import dagger.hilt.android.HiltAndroidApp;
+
+/**
+ * A simple, skeletal application that demonstrates a dependency-injected application using the
+ * utilities in {@code Hilt} in Android.
+ */
+@HiltAndroidApp
+public class SimpleApplication extends Application {}

javatests/artifacts/hilt-android/viewmodel/app/src/main/java/dagger/hilt/viewmodel/SimpleViewModel.java

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+/*
+ * Copyright (C) 2023 The Dagger Authors.
+ *
+ * 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 dagger.hilt.viewmodel;
+
+import androidx.lifecycle.ViewModel;
+import dagger.hilt.android.lifecycle.HiltViewModel;
+import javax.inject.Inject;
+
+/** The view model requires creation by hilt. */
+@HiltViewModel
+public final class SimpleViewModel extends ViewModel {
+  String userName;
+
+  @Inject
+  SimpleViewModel(@UserName String userName) {
+    this.userName = userName;
+  }
+}

javatests/artifacts/hilt-android/viewmodel/app/src/main/java/dagger/hilt/viewmodel/UserName.java

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+/*
+ * Copyright (C) 2023 The Dagger Authors.
+ *
+ * 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 dagger.hilt.viewmodel;
+
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import javax.inject.Qualifier;
+
+/** Qualifies bindings relating to the user name. */
+@Qualifier
+@Retention(RUNTIME)
+@Documented
+@interface UserName {}

javatests/artifacts/hilt-android/viewmodel/app/src/main/java/dagger/hilt/viewmodel/UserNameModule.java

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+/*
+ * Copyright (C) 2023 The Dagger Authors.
+ *
+ * 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 dagger.hilt.viewmodel;
+
+import dagger.Module;
+import dagger.Provides;
+import dagger.hilt.InstallIn;
+import dagger.hilt.android.components.ViewModelComponent;
+import java.util.Random;
+
+@Module
+@InstallIn(ViewModelComponent.class)
+final class UserNameModule {
+  @UserName
+  @Provides
+  static String provideUserName() {
+    return "ProdUser-" + new Random().nextInt();
+  }
+
+  private UserNameModule() {}
+}

javatests/artifacts/hilt-android/viewmodel/app/src/main/res/layout/activity_main.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2023 The Dagger Authors.
+  ~
+  ~ 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.
+  -->
+
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+  android:layout_width="match_parent"
+  android:layout_height="match_parent"
+  android:background="@android:color/background_light">
+
+  <TextView
+    android:id="@+id/greeting"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_alignParentTop="true"
+    android:textColor="@android:color/primary_text_light"
+    />
+
+  <Button
+    android:id="@+id/goto_feature"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:layout_below="@id/greeting"
+    android:text="@string/navigateToFeature"
+    />
+</RelativeLayout>