@Test
public void values_returnsNotNullValue() {

  /* Given */
  InsertColumnsImpl insertColumns = new InsertColumnsImpl(new String[] {"a", "b", "c"}, mock(SqlPart.class));
  /* When */
  Values result = insertColumns.values(1, 2, 3);
  /* Then */
  assertThat(result, is(notNullValue()));
}