Add a Java-only gradle application.

This CL adds a Java-only gradle application and adds a test to repro the issue seen in #3119.

Currently, the regression test asserts that calling the EntryPointAccessors method throws. A follow-up CL will fix this issue.

RELNOTES=N/A
PiperOrigin-RevId: 417294644

javatests/artifacts/hilt-android/simple/app-java-only/build.gradle

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2021 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.
+ */
+
+apply plugin: 'com.android.application'
+apply plugin: 'dagger.hilt.android.plugin'
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.2"
+
+    defaultConfig {
+        applicationId "dagger.hilt.android.simple"
+        minSdkVersion 15
+        targetSdkVersion 30
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+    testOptions {
+        unitTests.includeAndroidResources = true
+    }
+    lintOptions {
+        checkReleaseBuilds = false
+    }
+}
+
+hilt {
+    enableTransformForLocalTests = true
+}
+
+configurations.all {
+    resolutionStrategy.eachDependency { DependencyResolveDetails details ->
+        if ("$dagger_version" == 'LOCAL-SNAPSHOT'
+                && details.requested.group == 'com.google.dagger') {
+            details.useVersion 'LOCAL-SNAPSHOT'
+            details.because 'LOCAL-SNAPSHOT should act as latest version.'
+        }
+    }
+}
+
+dependencies {
+  implementation "com.google.dagger:hilt-android:$dagger_version"
+  annotationProcessor "com.google.dagger:hilt-compiler:$dagger_version"
+
+  testImplementation 'com.google.truth:truth:1.0.1'
+  testImplementation 'junit:junit:4.13'
+  testImplementation 'org.robolectric:robolectric:4.5-alpha-3'
+  testImplementation 'androidx.core:core:1.3.2'
+  testImplementation 'androidx.test.ext:junit:1.1.2'
+  testImplementation 'androidx.test:runner:1.3.0'
+  testImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+}

javatests/artifacts/hilt-android/simple/app-java-only/src/main/AndroidManifest.xml

@@ -0,0 +1,24 @@
+<!--
+  ~ Copyright (C) 2021 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"
+  package="dagger.hilt.android.simple">
+
+  <application
+               android:name=".SimpleApplication"
+               android:label="Java-only Hilt Android"
+               android:taskAffinity="">
+  </application>
+</manifest>

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

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2021 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.android.simple;
+
+import android.app.Application;
+import dagger.Module;
+import dagger.Provides;
+import dagger.hilt.EntryPoint;
+import dagger.hilt.InstallIn;
+import dagger.hilt.android.EntryPointAccessors;
+import dagger.hilt.android.HiltAndroidApp;
+import dagger.hilt.components.SingletonComponent;
+import javax.inject.Inject;
+
+/** A java-only application that uses Hilt. */
+@HiltAndroidApp
+public class SimpleApplication extends Application {
+  @Module
+  @InstallIn(SingletonComponent.class)
+  interface MyModule {
+    @Provides
+    static String provideString() {
+      return "some string";
+    }
+  }
+
+  @EntryPoint
+  @InstallIn(SingletonComponent.class)
+  interface MyEntryPoint {
+    String getString();
+  }
+
+  @Inject String str;
+
+  public String getStringEntryPoint() {
+    return EntryPointAccessors.fromApplication(this, MyEntryPoint.class).getString();
+  }
+}

javatests/artifacts/hilt-android/simple/app-java-only/src/test/java/dagger/hilt/android/simple/BuildTest.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2021 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.android.simple;
+
+import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.assertThrows;
+
+import android.os.Build;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.annotation.Config;
+
+/**
+ * Regression test for https://github.com/google/dagger/issues/3119
+ */
+@RunWith(AndroidJUnit4.class)
+// Robolectric requires Java9 to run API 29 and above, so use API 28 instead
+@Config(sdk = Build.VERSION_CODES.P, application = SimpleApplication.class)
+public class BuildTest {
+  @Test
+  public void useAppContext() {
+    assertThat((Object) ApplicationProvider.getApplicationContext())
+        .isInstanceOf(SimpleApplication.class);
+    SimpleApplication app = (SimpleApplication) ApplicationProvider.getApplicationContext();
+    assertThat(app.str).isNotNull();
+
+    // TODO(bcorso): This should no longer throw after we fix the issue.
+    assertThrows(
+        NoClassDefFoundError.class,
+        () -> assertThat(app.str).isEqualTo(app.getStringEntryPoint()));
+  }
+}

javatests/artifacts/hilt-android/simple/settings.gradle

@@ -1,5 +1,6 @@
 rootProject.name='Simple Hilt Android'
 include ':app'
+include ':app-java-only'
 include ':feature'
 include ':lib'
 include ':deep-android-lib'