Use test app for Sessions e2e test

.github/workflows/sessions-e2e.yml

@@ -12,7 +12,7 @@ env:
   SESSIONS_E2E_GOOGLE_SERVICES: ${{ secrets.SESSIONS_E2E_GOOGLE_SERVICES }}
 
 jobs:
-  build:
+  test:
 
     runs-on: ubuntu-latest
 
@@ -42,4 +42,4 @@ jobs:
           FTL_RESULTS_BUCKET: fireescape
           FIREBASE_APP_CHECK_DEBUG_SECRET: ${{ secrets.FIREBASE_APP_CHECK_DEBUG_SECRET }}
         run: |
-          ./gradlew :firebase-sessions:deviceCheck withErrorProne -PtargetBackend="prod"
+          ./gradlew :firebase-sessions:test-app:deviceCheck withErrorProne -PtargetBackend="prod"

firebase-sessions/test-app/src/androidTest/kotlin/com/google/firebase/testing/sessions/FirebaseSessionsTest.kt

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2023 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
+ *
+ *     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 com.google.firebase.testing.sessions
+
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
+import com.google.firebase.FirebaseApp
+import com.google.firebase.ktx.Firebase
+import com.google.firebase.ktx.initialize
+import com.google.firebase.sessions.FirebaseSessions
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class FirebaseSessionsTest {
+  @Before
+  fun setUp() {
+    Firebase.initialize(ApplicationProvider.getApplicationContext())
+  }
+
+  @After
+  fun cleanUp() {
+    FirebaseApp.clearInstancesForTest()
+  }
+
+  @Test
+  fun initializeSession() {
+    // Force the Firebase Sessions SDK to initialize.
+    assertThat(FirebaseSessions.instance.greeting()).isEqualTo("Matt says hi!")
+
+    // Wait for the session start event to send.
+    // TODO(mrober): Setup logger we can access from tests.
+    Thread.sleep(TIME_TO_LOG_SESSION)
+  }
+
+  companion object {
+    private const val TIME_TO_LOG_SESSION = 60_000L
+  }
+}

firebase-sessions/test-app/test-app.gradle.kts

@@ -1,3 +1,7 @@
+@file:Suppress("DEPRECATION") // App projects should still use FirebaseTestLabPlugin.
+
+import com.google.firebase.gradle.plugins.ci.device.FirebaseTestLabPlugin
+
 /*
  * Copyright 2023 Google LLC
  *
@@ -30,6 +34,7 @@ android {
     versionCode = 1
     versionName = "1.0"
     multiDexEnabled = true
+    testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
   }
   compileOptions {
     sourceCompatibility = JavaVersion.VERSION_1_8
@@ -46,8 +51,15 @@ dependencies {
   implementation("androidx.constraintlayout:constraintlayout:2.1.4")
   implementation("androidx.core:core-ktx:1.9.0")
   implementation("com.google.android.material:material:1.8.0")
+
+  androidTestImplementation("com.google.firebase:firebase-common-ktx:20.3.2")
+  androidTestImplementation(libs.androidx.test.junit)
+  androidTestImplementation(libs.androidx.test.runner)
+  androidTestImplementation(libs.truth)
 }
 
 extra["packageName"] = "com.google.firebase.testing.sessions"
 
 apply(from = "../../gradle/googleServices.gradle")
+
+apply<FirebaseTestLabPlugin>()