@Test
public void prependToWithoutColumns_prependsProperSql() {

  /* Given */
  ColumnsImpl columns = new ColumnsImpl(new Column[0], mock(SqlPart.class));
  RawSqlBuilder builder = new RawSqlBuilderImpl();
  /* When */
  columns.prependTo(builder);
  /* Then */
  assertThat(builder.toString(), is("()"));
}