test(auth): clear FirebaseAuthActivity launch caches between tests

Author: russellwheatley

auth/src/main/java/com/firebase/ui/auth/FirebaseAuthActivity.kt

@@ -18,6 +18,7 @@ import android.app.Activity
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.annotation.RestrictTo
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.enableEdgeToEdge
@@ -219,6 +220,19 @@ class FirebaseAuthActivity : ComponentActivity() {
             }
         }
 
+        /**
+         * Clears cached launch state. This method is intended for testing purposes only.
+         *
+         * @suppress This is an internal API and should not be used in production code.
+         * @RestrictTo RestrictTo.Scope.TESTS
+         */
+        @JvmStatic
+        @RestrictTo(RestrictTo.Scope.TESTS)
+        fun clearLaunchStateCache() {
+            configurationCache.clear()
+            authUICache.clear()
+        }
+
         private val authUICache = ConcurrentHashMap<String, FirebaseAuthUI>()
     }
 }

auth/src/test/java/com/firebase/ui/auth/FirebaseAuthActivityTest.kt

@@ -111,6 +111,7 @@ class FirebaseAuthActivityTest {
 
     @After
     fun tearDown() {
+        FirebaseAuthActivity.clearLaunchStateCache()
         FirebaseAuthUI.clearInstanceCache()
         FirebaseApp.getApps(applicationContext).forEach { app ->
             try {