Add more unit test for them #30524

kernel/metadata/core/src/test/java/org/apache/shardingsphere/metadata/persist/service/database/DatabaseMetaDataPersistServiceTest.java

@@ -127,6 +127,8 @@ void testPersist() {
         String databaseName = "testDatabase";
         String schemaName = "testSchema";
         ShardingSphereSchema schema = createSchema();
+        when(repository.getDirectly(anyString())).thenReturn("0");
+
         databaseMetaDataPersistService.persist(databaseName, schemaName, schema);
 
         verify(repository, times(1)).persist(anyString(), anyString());