Crashlytics smoke tests

One test validates the Analytics integration; the rest are simple stubbs for now.

Author: mrichards

smoke-tests/build.gradle

@@ -25,6 +25,7 @@ buildscript {
   dependencies {
     classpath "com.android.tools.build:gradle:3.4.3"
     classpath "com.google.gms:google-services:4.3.0"
+    classpath "com.google.firebase:firebase-crashlytics-gradle:2.7.0"
   }
 }
 
@@ -70,6 +71,7 @@ dependencies {
   implementation "com.google.firebase:firebase-auth"
   implementation "com.google.firebase:firebase-common"
   implementation "com.google.firebase:firebase-config"
+  implementation "com.google.firebase:firebase-crashlytics"
   implementation "com.google.firebase:firebase-database"
   implementation "com.google.firebase:firebase-dynamic-links"
   implementation "com.google.firebase:firebase-firestore"
@@ -101,3 +103,4 @@ clean.doLast {
 }
 
 apply plugin: "com.google.gms.google-services"
+apply plugin: "com.google.firebase.crashlytics"

smoke-tests/smoke-test-rules.pro

@@ -19,5 +19,13 @@
   public <methods>;
 }
 
+-keepclassmembers class com.google.firebase.crashlytics.FirebaseCrashlytics {
+  private com.google.firebase.crashlytics.internal.common.CrashlyticsCore core;
+}
+
+-keepclassmembers class com.google.firebase.crashlytics.internal.common.CrashlyticsCore {
+  private com.google.firebase.internal.breadcrumbs.BreadcrumbSource breadcrumbSource;
+}
+
 -dontwarn android.**
 -dontwarn okio.**

smoke-tests/src/main/java/com/google/firebase/testing/CrashlyticsTest.java

@@ -0,0 +1,87 @@
+// Copyright 2021 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;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Bundle;
+import androidx.test.core.app.ApplicationProvider;
+import com.google.firebase.analytics.FirebaseAnalytics;
+import com.google.firebase.crashlytics.FirebaseCrashlytics;
+
+import androidx.test.runner.AndroidJUnit4;
+import com.google.firebase.crashlytics.internal.breadcrumbs.BreadcrumbSource;
+import java.lang.reflect.Field;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public final class CrashlyticsTest {
+
+  @Test
+  public void analyticsIntegration() {
+    // Validates that Firebase Analytics and Crashlytics interoperability is working, by confirming
+    // that events sent to Firebase Analytics are received by the Crashlytics breadcrumb handler.
+    try {
+      // need to use reflection to get the breadcrumb handler.
+      FirebaseCrashlytics crashlytics = FirebaseCrashlytics.getInstance();
+      Field coreField = crashlytics.getClass().getDeclaredField("core");
+      coreField.setAccessible(true);
+      Object core = coreField.get(crashlytics);
+      Field breadcrumbSourceField = core.getClass().getDeclaredField("breadcrumbSource");
+      breadcrumbSourceField.setAccessible(true);
+      BreadcrumbSource breadcrumbSource = (BreadcrumbSource)breadcrumbSourceField.get(core);
+
+      final CountDownLatch eventReceivedLatch = new CountDownLatch(1);
+      breadcrumbSource.registerBreadcrumbHandler(breadcrumbHandler -> {
+        eventReceivedLatch.countDown();
+      });
+
+      Bundle eventBundle = new Bundle();
+      eventBundle.putString(FirebaseAnalytics.Param.ITEM_NAME, "testName");
+      FirebaseAnalytics.getInstance(ApplicationProvider.getApplicationContext()).logEvent(
+          FirebaseAnalytics.Event.APP_OPEN, eventBundle);
+
+      // Wait up to 2 seconds, which is plenty of time for the event
+      eventReceivedLatch.await(2000, TimeUnit.MILLISECONDS);
+      assertThat(eventReceivedLatch.getCount()).isEqualTo(0);
+
+    } catch (Exception e) {
+      throw new RuntimeException(e);
+    }
+  }
+
+  @Test
+  public void setCustomKeys() {
+    // For now, simply validate that the API does not throw any exception. A more robust functional
+    // test could be implemented via reflection or monitoring logcat.
+    FirebaseCrashlytics.getInstance().setCustomKey("TestKey", "TestValue");
+  }
+
+  @Test
+  public void log() {
+    // For now, simply validate that the API does not throw any exception. A more robust functional
+    // test could be implemented via reflection or monitoring logcat.
+    FirebaseCrashlytics.getInstance().log("This is a log message");
+  }
+
+  @Test
+  public void didCrashOnPreviousExecution() {
+    assertThat(FirebaseCrashlytics.getInstance().didCrashOnPreviousExecution()).isFalse();
+  }
+}
+

smoke-tests/src/main/java/com/google/firebase/testing/TestSuite.java

@@ -25,6 +25,7 @@
 @RunWith(Suite.class)
 @Suite.SuiteClasses({
   BuildOnlyTest.class,
+  CrashlyticsTest.class,
   DatabaseTest.class,
   DynamicLinksTest.class,
   FirestoreTest.class,