test(oss-licenses): add standalone testapp for plugin verification

.github/workflows/main.yml

@@ -6,9 +6,8 @@ name: CI
 on:
   # Triggers the workflow on push or pull request events but only for the main branch
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
@@ -19,46 +18,121 @@ jobs:
   lint-and-check:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # ratchet:actions/checkout@v6.0.2
       - name: Validate Gradle Wrapper
-        uses: gradle/actions/wrapper-validation@0723195856401067f7a2779048b490ace7a47d7c # v5.0.2
+        uses: gradle/actions/wrapper-validation@0723195856401067f7a2779048b490ace7a47d7c # ratchet:gradle/actions/wrapper-validation@v5.0.2
       - name: Lint GitHub Actions
-        uses: abcxyz/actions/.github/actions/lint-github-actions@e32ec3bd6af6d87d79fe7c441f435eb7ad11d527 # main
+        uses: abcxyz/actions/.github/actions/lint-github-actions@e32ec3bd6af6d87d79fe7c441f435eb7ad11d527 # ratchet:abcxyz/actions/.github/actions/lint-github-actions@main
       - name: Ratchet Check
-        uses: sethvargo/ratchet@8b4ca256dbed184350608a3023620f267f0a5253 # main
+        uses: sethvargo/ratchet@8b4ca256dbed184350608a3023620f267f0a5253 # ratchet:sethvargo/ratchet@main
         with:
           files: .github/workflows/*.yml
 
-  # This workflow contains a single job called "build"
+  # Build the simple plugins (no special test infrastructure needed)
   build:
     needs: lint-and-check
-    # The type of runner that the job will run on
     runs-on: ubuntu-latest
-
-    # Runs this job in parallel for each sub-project
     strategy:
       matrix:
         project-dir:
           - strict-version-matcher-plugin
           - google-services-plugin
-          - oss-licenses-plugin
-
-    # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
-      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # ratchet:actions/checkout@v6.0.2
+
       - name: Set up JDK 17
-        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5.2.0
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # ratchet:actions/setup-java@v5.2.0
         with:
           java-version: '17'
           distribution: 'temurin'
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # v5.0.2
+        uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # ratchet:gradle/actions/setup-gradle@v5.0.2
         with:
           dependency-graph: generate-and-submit
 
-      # Runs a build which includes `check` and `test` tasks
       - name: Perform a Gradle build
         run: ./gradlew build
         working-directory: ./${{ matrix.project-dir }}
+
+  # Build and test the oss-licenses plugin, then publish for downstream jobs.
+  oss-licenses-build:
+    needs: lint-and-check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # ratchet:actions/checkout@v6.0.2
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # ratchet:actions/setup-java@v5.2.0
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # ratchet:actions/setup-java@v5.2.0
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # ratchet:gradle/actions/setup-gradle@v5.0.2
+        with:
+          dependency-graph: generate-and-submit
+
+      - name: Build and test
+        run: ./gradlew build
+        working-directory: ./oss-licenses-plugin
+
+      - name: Publish to local repo
+        run: ./gradlew publish
+        working-directory: ./oss-licenses-plugin
+
+      - name: Upload local repo artifact
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # ratchet:actions/upload-artifact@v4.6.2
+        with:
+          name: oss-licenses-local-repo
+          path: oss-licenses-plugin/build/repo/
+
+  # Build the testapp and verify configuration cache store → clean → reuse.
+  # CC strictness flags are in testapp/gradle.properties (always on).
+  oss-licenses-testapp:
+    needs: oss-licenses-build
+    runs-on: ubuntu-latest
+    env:
+      ANDROID_USER_HOME: /home/runner/.android
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # ratchet:actions/checkout@v6.0.2
+
+      - name: Download local repo artifact
+        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # ratchet:actions/download-artifact@v4.3.0
+        with:
+          name: oss-licenses-local-repo
+          path: oss-licenses-plugin/build/repo/
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # ratchet:actions/setup-java@v5.2.0
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@0723195856401067f7a2779048b490ace7a47d7c # ratchet:gradle/actions/setup-gradle@v5.0.2
+
+      - name: Pre-create Android SDK cache directory
+        run: mkdir -p "$ANDROID_USER_HOME/cache"
+
+      - name: Build testapp (store configuration cache)
+        run: ./gradlew build -PusePublishedPluginFrom=../build/repo
+        working-directory: oss-licenses-plugin/testapp
+
+      - name: Clean testapp outputs
+        run: ./gradlew clean -PusePublishedPluginFrom=../build/repo
+        working-directory: oss-licenses-plugin/testapp
+
+      - name: Rebuild testapp (verify configuration cache reuse)
+        working-directory: oss-licenses-plugin/testapp
+        run: |
+          OUTPUT=$(./gradlew build -PusePublishedPluginFrom=../build/repo 2>&1)
+          echo "$OUTPUT"
+          echo "$OUTPUT" | grep -q "Configuration cache entry reused" || \
+            { echo "::error::Configuration cache was NOT reused"; exit 1; }

.gitignore

@@ -1,3 +1,4 @@
 .idea/
 repo/
 .kotlin/
+.DS_Store

oss-licenses-plugin/gradle/gradle-daemon-jvm.properties

@@ -0,0 +1,12 @@
+#This file is generated by updateDaemonJvm
+toolchainUrl.FREE_BSD.AARCH64=https\://api.foojay.io/disco/v3.0/ids/4945f00643ec68e7c7a6b66f90124f89/redirect
+toolchainUrl.FREE_BSD.X86_64=https\://api.foojay.io/disco/v3.0/ids/93aeea858331bd6bb00ba94759830234/redirect
+toolchainUrl.LINUX.AARCH64=https\://api.foojay.io/disco/v3.0/ids/4945f00643ec68e7c7a6b66f90124f89/redirect
+toolchainUrl.LINUX.X86_64=https\://api.foojay.io/disco/v3.0/ids/93aeea858331bd6bb00ba94759830234/redirect
+toolchainUrl.MAC_OS.AARCH64=https\://api.foojay.io/disco/v3.0/ids/46949723aaa20c7b64d7ecfed7207034/redirect
+toolchainUrl.MAC_OS.X86_64=https\://api.foojay.io/disco/v3.0/ids/d6690dfd71c4c91e08577437b5b2beb0/redirect
+toolchainUrl.UNIX.AARCH64=https\://api.foojay.io/disco/v3.0/ids/4945f00643ec68e7c7a6b66f90124f89/redirect
+toolchainUrl.UNIX.X86_64=https\://api.foojay.io/disco/v3.0/ids/93aeea858331bd6bb00ba94759830234/redirect
+toolchainUrl.WINDOWS.AARCH64=https\://api.foojay.io/disco/v3.0/ids/3cd7045fca9a72cd9bc7d14a385e594c/redirect
+toolchainUrl.WINDOWS.X86_64=https\://api.foojay.io/disco/v3.0/ids/552c7bffe0370c66410a51c55985b511/redirect
+toolchainVersion=21

oss-licenses-plugin/settings.gradle

@@ -1 +1,5 @@
+plugins {
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
+}
+
 rootProject.name = 'oss-licenses-plugin'

oss-licenses-plugin/testapp/app/build.gradle.kts

@@ -0,0 +1,108 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * 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
+ *
+ *    https://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.
+ */
+
+import com.android.build.api.variant.HostTestBuilder
+import org.gradle.api.tasks.testing.Test
+import org.gradle.jvm.toolchain.JavaToolchainService
+
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.kotlin.compose)
+    alias(libs.plugins.oss.licenses)
+}
+
+android {
+    namespace = "com.google.android.gms.oss.licenses.testapp"
+    compileSdk = libs.versions.compileSdk.get().toInt()
+    testBuildType = "release"
+
+    defaultConfig {
+        applicationId = "com.google.android.gms.oss.licenses.testapp"
+        minSdk = libs.versions.minSdk.get().toInt()
+        targetSdk = libs.versions.targetSdk.get().toInt()
+        versionCode = 1
+        versionName = "1.0"
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        debug { isMinifyEnabled = false }
+        release {
+            signingConfig = signingConfigs.getByName("debug")
+            isMinifyEnabled = true
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"))
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_21
+        targetCompatibility = JavaVersion.VERSION_21
+    }
+    testOptions { unitTests { isIncludeAndroidResources = true } }
+    lint {
+        abortOnError = true
+        checkDependencies = true
+        ignoreWarnings = false
+    }
+}
+
+tasks.withType<Test>().configureEach {
+    val javaToolchains = project.extensions.getByType<JavaToolchainService>()
+    javaLauncher.set(javaToolchains.launcherFor { languageVersion.set(JavaLanguageVersion.of(21)) })
+
+    // Enable parallel execution for faster Robolectric runs
+    maxParallelForks = (Runtime.getRuntime().availableProcessors() / 2).coerceAtLeast(1)
+
+    testLogging {
+        events("passed", "skipped", "failed", "standardOut", "standardError")
+        showStandardStreams = true
+    }
+}
+
+androidComponents {
+    beforeVariants { variantBuilder ->
+        // AGP 9.0 only enables unit tests for the "tested build type" by default.
+        // We explicitly enable them for all variants to ensure both Debug and Release coverage.
+        variantBuilder.hostTests[HostTestBuilder.UNIT_TEST_TYPE]?.enable = true
+    }
+}
+
+kotlin {
+    jvmToolchain(21)
+    compilerOptions { jvmTarget.set(org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_21) }
+}
+
+dependencies {
+    implementation(libs.play.services.oss.licenses)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.androidx.activity)
+    implementation("androidx.activity:activity-compose:${libs.versions.androidx.activity.get()}")
+    implementation(platform(libs.androidx.compose.bom))
+    implementation("androidx.compose.material3:material3")
+
+
+    testImplementation(libs.junit)
+    testImplementation(libs.androidx.test.ext.junit)
+    testImplementation(libs.androidx.test.espresso.core)
+    testImplementation(libs.androidx.test.espresso.contrib)
+    testImplementation(libs.androidx.test.core)
+    testImplementation(libs.robolectric)
+
+    // Compose Test (required for testing the V2 activity)
+    testImplementation(platform(libs.androidx.compose.bom))
+    testImplementation(libs.androidx.compose.ui.test.junit4)
+    debugImplementation(libs.androidx.compose.ui.test.manifest)
+}

oss-licenses-plugin/testapp/app/src/main/AndroidManifest.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <application
+        android:allowBackup="true"
+        android:label="OSS Licenses Test App"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.AppCompat.Light">
+        <activity
+            android:name=".MainActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

oss-licenses-plugin/testapp/app/src/main/java/com/google/android/gms/oss/licenses/testapp/MainActivity.kt

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * 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
+ *
+ *    https://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 com.google.android.gms.oss.licenses.testapp
+
+import android.content.Intent
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.height
+import androidx.compose.material3.Button
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import com.google.android.gms.oss.licenses.OssLicensesMenuActivity as V1Activity
+import com.google.android.gms.oss.licenses.v2.OssLicensesMenuActivity as V2Activity
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            MaterialTheme {
+                Column(
+                    modifier = Modifier.fillMaxSize(),
+                    verticalArrangement = Arrangement.Center,
+                    horizontalAlignment = Alignment.CenterHorizontally,
+                ) {
+                    Button(onClick = { startActivity(Intent(this@MainActivity, V1Activity::class.java)) }) {
+                        Text("Launch V1 Licenses")
+                    }
+                    Spacer(modifier = Modifier.height(16.dp))
+                    Button(onClick = { startActivity(Intent(this@MainActivity, V2Activity::class.java)) }) {
+                        Text("Launch V2 Licenses")
+                    }
+                }
+            }
+        }
+    }
+}

oss-licenses-plugin/testapp/app/src/test/resources/robolectric.properties

@@ -0,0 +1,3 @@
+# Global Robolectric Configuration
+# Note: SDK 36 (Baklava) requires Java 21+ — Robolectric will fail to run it on older JVMs.
+sdk=24, 33, 34, 35, 36