@Override
    public boolean dbExists(String dbName) {
        ConnectorMetadata metadata = metadataOfDb(dbName);
        return metadata.dbExists(dbName);
    }
@Test
    void testDbExists(@Mocked ConnectorMetadata connectorMetadata) {
        new Expectations() {
            {
                connectorMetadata.dbExists("test_db");
                result = true;
                times = 1;
            }
        };

        CatalogConnectorMetadata catalogConnectorMetadata = new CatalogConnectorMetadata(
                connectorMetadata,
                informationSchemaMetadata,
                metaMetadata
        );

        assertTrue(catalogConnectorMetadata.dbExists("test_db"));
        assertTrue(catalogConnectorMetadata.dbExists(InfoSchemaDb.DATABASE_NAME));
    }