Adjust open database for simple entity test

floor_generator/test/writer/database_writer_test.dart

@@ -47,20 +47,38 @@ void main() {
               await callback?.onOpen?.call(database);
             },
             onUpgrade: (database, startVersion, endVersion) async {
-              await MigrationAdapter.runMigrations(
-                  database, startVersion, endVersion, migrations);
-
+              await _migrate(
+                  database, migrations, startVersion, endVersion, callback);
               await callback?.onUpgrade?.call(database, startVersion, endVersion);
             },
             onCreate: (database, version) async {
-              await database.execute(
-                  'CREATE TABLE IF NOT EXISTS `Person` (`id` INTEGER NOT NULL, `name` TEXT NOT NULL, PRIMARY KEY (`id`))');
-
+              await _create(database);
               await callback?.onCreate?.call(database, version);
             },
           );
           return sqfliteDatabaseFactory.openDatabase(path, options: databaseOptions);
         }
+
+        Future<void> _create(sqflite.Database database) async {
+            await database.execute(
+                'CREATE TABLE IF NOT EXISTS `Person` (`id` INTEGER NOT NULL, `name` TEXT NOT NULL, PRIMARY KEY (`id`))');
+        }
+
+          Future<void> _migrate(sqflite.Database database, List<Migration> migrations,
+      int startVersion, int endVersion, Callback? callback) async {
+        try {
+          await MigrationAdapter.runMigrations(
+            database,
+            startVersion,
+            endVersion,
+            migrations,
+          );
+        } on MissingMigrationException catch (_) {
+          throw StateError(
+            'There is no migration supplied to update the database to the current version.'
+            ' Aborting the migration.',
+          );
+        }
       }      
     '''));
   });