@Test
public void shouldRoundDownNumbersGreaterThan10() {

    assertThat(ops.roundDown(-101l, 0), is(-101l));
    assertThat(ops.roundDown(-101l, 1), is(-101l));
    assertThat(ops.roundDown(-101l, 1), is(-101l));
    assertThat(ops.roundDown(-101l, -1), is(-100l));
    assertThat(ops.roundDown(-109l, -1), is(-100l));
    assertThat(ops.roundDown(101l, 0), is(101l));
    assertThat(ops.roundDown(101l, 0), is(101l));
    assertThat(ops.roundDown(101l, 1), is(101l));
    assertThat(ops.roundDown(101l, 1), is(101l));
    assertThat(ops.roundDown(109l, -1), is(100l));
    assertThat(ops.roundDown(101l, -1), is(100l));
}