Set Hilt's aggregating task test environment flag when configuring the task for a com.android.test Gradle module.

java/dagger/hilt/android/plugin/main/src/main/kotlin/dagger/hilt/android/plugin/HiltGradlePlugin.kt

@@ -350,7 +350,8 @@ class HiltGradlePlugin @Inject constructor(
       @Suppress("DEPRECATION") // Older variant API is deprecated
       it.testEnvironment.set(
         variant is com.android.build.gradle.api.TestVariant ||
-          variant is com.android.build.gradle.api.UnitTestVariant
+          variant is com.android.build.gradle.api.UnitTestVariant ||
+          androidExtension is com.android.build.gradle.TestExtension
       )
       it.crossCompilationRootValidationDisabled.set(
         hiltExtension.disableCrossCompilationRootValidation

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

@@ -5,4 +5,5 @@ include ':feature'
 include ':lib'
 include ':deep-android-lib'
 include ':deep-lib'
-include ':earlyentrypoint'
+include ':earlyentrypoint'
+include ':uitest'

javatests/artifacts/hilt-android/simple/uitest/build.gradle

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2022 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.test'
+apply plugin: 'com.google.dagger.hilt.android'
+
+android {
+    compileSdkVersion 32
+    buildToolsVersion "32.0.0"
+
+    defaultConfig {
+        minSdkVersion 15
+        targetSdkVersion 32
+        testInstrumentationRunner "dagger.hilt.android.simple.uitest.TestRunner"
+        missingDimensionStrategy 'tier', 'free'
+    }
+    targetProjectPath ':app'
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_11
+        targetCompatibility JavaVersion.VERSION_11
+    }
+}
+
+hilt {
+    enableAggregatingTask = true
+}
+
+dependencies {
+    implementation project(':app')
+
+    implementation 'junit:junit:4.13'
+    implementation 'androidx.test.ext:junit:1.1.3'
+    implementation 'androidx.test:runner:1.4.0'
+
+    implementation "com.google.dagger:hilt-android:$dagger_version"
+    implementation "com.google.dagger:hilt-android-testing:$dagger_version"
+    annotationProcessor "com.google.dagger:hilt-compiler:$dagger_version"
+}
+
+configurations.all {
+    resolutionStrategy.eachDependency { DependencyResolveDetails details ->
+        if ("$dagger_version" == 'LOCAL-SNAPSHOT'
+                && details.requested.group == 'com.google.dagger') {
+            details.useVersion 'LOCAL-SNAPSHOT'
+            details.because 'LOCAL-SNAPSHOT should act as latest version.'
+        }
+    }
+}

javatests/artifacts/hilt-android/simple/uitest/src/main/AndroidManifest.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 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.uitest">
+</manifest>

javatests/artifacts/hilt-android/simple/uitest/src/main/java/dagger/hilt/android/simple/uitest/TestRunner.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2022 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.uitest;
+
+import android.app.Application;
+import android.content.Context;
+import androidx.test.runner.AndroidJUnitRunner;
+import dagger.hilt.android.testing.HiltTestApplication;
+
+public final class TestRunner extends AndroidJUnitRunner {
+  @Override
+  public Application newApplication(ClassLoader cl, String className, Context context)
+      throws ClassNotFoundException, IllegalAccessException, InstantiationException {
+    return super.newApplication(cl, HiltTestApplication.class.getName(), context);
+  }
+}

javatests/artifacts/hilt-android/simple/uitest/src/main/java/dagger/hilt/android/simple/uitest/UITestOne.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2022 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.uitest;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import dagger.hilt.android.testing.HiltAndroidTest;
+import org.junit.runner.RunWith;
+
+// An empty test file that validates multiple test roots in an com.android.test Gradle module.
+@HiltAndroidTest
+@RunWith(AndroidJUnit4.class)
+public final class UITestOne {
+
+}

javatests/artifacts/hilt-android/simple/uitest/src/main/java/dagger/hilt/android/simple/uitest/UITestTwo.java

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2022 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.uitest;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import dagger.hilt.android.testing.HiltAndroidTest;
+import org.junit.runner.RunWith;
+
+// An empty test file that validates multiple test roots in an com.android.test Gradle module.
+@HiltAndroidTest
+@RunWith(AndroidJUnit4.class)
+public final class UITestTwo {
+
+}