@Test
public void prependToWithOneColumn_prependsProperSql() {

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