fix tests for bom auth fix

plugins/src/main/java/com/google/firebase/gradle/bomgenerator/GenerateTutorialBundleTask.kt

@@ -195,7 +195,7 @@ abstract class GenerateTutorialBundleTask : DefaultTask() {
     } else {
       logger.info("Fetching the latest version for an artifact: $fullArtifactName")
 
-      return gmaven.get().latestVersionOrNull(fullArtifactName)
+      return gmaven.get().latestNonAlphaVersionOrNull(fullArtifactName)
         ?: throw RuntimeException(
           "An artifact required for the tutorial bundle is missing from gmaven: $fullArtifactName"
         )

plugins/src/main/java/com/google/firebase/gradle/plugins/services/GmavenService.kt

@@ -150,6 +150,37 @@ abstract class GMavenService : BuildService<BuildServiceParameters.None> {
   fun latestVersionOrNull(groupId: String, artifactId: String) =
     controller.latestVersionOrNull(groupId, artifactId)
 
+  /**
+   * Gets the latest non-alpha version of the artifact that has been uploaded to GMaven, if any.
+   *
+   * ```
+   * gmaven.latestNonAlphaVersionOrNull("com.google.firebase", "firebase-components") // "18.0.1"
+   * ```
+   *
+   * @param groupId The group to search under.
+   * @param artifactId The artifact to search for.
+   * @return The latest released version as a string, or null if the artifact couldn't be found.
+   * @see latestVersion
+   */
+  fun latestNonAlphaVersionOrNull(groupId: String, artifactId: String) =
+    controller.latestNonAlphaVersionOrNull(groupId, artifactId)
+
+  /**
+   * Gets the latest non-alpha version of the artifact that has been uploaded to GMaven, if any.
+   *
+   * ```
+   * gmaven.latestNonAlphaVersionOrNull("com.google.firebase", "firebase-components") // "18.0.1"
+   * ```
+   *
+   * @param fullArtifactName The artifact to search for, represented as "groupId:artifactId".
+   * @return The latest released version as a string, or null if the artifact couldn't be found.
+   * @see latestVersion
+   */
+  fun latestNonAlphaVersionOrNull(fullArtifactName: String): String? {
+    val (groupId, artifactId) = fullArtifactName.split(":")
+    return latestNonAlphaVersionOrNull(groupId, artifactId)
+  }
+
   /**
    * Gets the latest version of the artifact that has been uploaded to GMaven, if any.
    *
@@ -403,6 +434,11 @@ class GMavenServiceController(
     return findFirebaseArtifact(groupId, artifactId)?.latestVersion
   }
 
+  /** @see GMavenService.latestNonAlphaVersionOrNull */
+  fun latestNonAlphaVersionOrNull(groupId: String, artifactId: String): String? {
+    return findFirebaseArtifact(groupId, artifactId)?.latestNonAlphaVersion
+  }
+
   /** @see GMavenService.hasReleasedArtifact */
   fun hasReleasedArtifact(groupId: String, artifactId: String): Boolean {
     return findFirebaseArtifact(groupId, artifactId) !== null
@@ -555,6 +591,7 @@ data class GroupIndexArtifact(
   val artifactId: String,
   val versions: List<String>,
   val latestVersion: String = versions.last(),
+  val latestNonAlphaVersion: String? = versions.findLast { !it.contains("alpha") },
 ) {
 
   /**

plugins/src/test/kotlin/com/google/firebase/gradle/plugins/GenerateTutorialBundleTests.kt

@@ -242,7 +242,7 @@ class GenerateTutorialBundleTests : FunSpec() {
   @Test
   fun `throws an error if an unreleased artifact is used`() {
     shouldThrowSubstring("missing from gmaven", "com.google.firebase:firebase-auth") {
-      every { service.latestVersionOrNull(any()) } answers { null }
+      every { service.latestNonAlphaVersionOrNull(any()) } answers { null }
 
       val task = makeTask { firebaseArtifacts.set(listOf("com.google.firebase:firebase-auth")) }
 
@@ -293,7 +293,7 @@ class GenerateTutorialBundleTests : FunSpec() {
         val (groupId, artifactId, version) = it.split(":")
         "$groupId:$artifactId" to version
       }
-      .onEach { entry -> every { service.latestVersionOrNull(entry.key) } answers { entry.value } }
+      .onEach { entry -> every { service.latestNonAlphaVersionOrNull(entry.key) } answers { entry.value } }
   }
 
   private fun makeTutorial(