@Test
@FixFor("DBZ-1015")
public void shouldFallbackToIdentyKeyWhenCustomMapperIsNull() {

    schema = new TableSchemaBuilder(new JdbcValueConverters(), adjuster, customConverterRegistry, SchemaBuilder.struct().build(), false)
            .create(prefix, "sometopic", table, null, null, null);
    assertThat(schema).isNotNull();
    Schema keys = schema.keySchema();
    assertThat(keys).isNotNull();
    assertThat(keys.fields()).hasSize(2);
    assertThat(keys.field("C1").name()).isEqualTo("C1");
    assertThat(keys.field("C2").name()).isEqualTo("C2");
}