public final void isNegativeInfinity() {
    isEqualTo(Float.NEGATIVE_INFINITY);
  }
@Test
  public void isNegativeInfinity() {
    assertThat(Float.NEGATIVE_INFINITY).isNegativeInfinity();
    assertThatIsNegativeInfinityFails(1.23f);
    assertThatIsNegativeInfinityFails(Float.POSITIVE_INFINITY);
    assertThatIsNegativeInfinityFails(Float.NaN);
    assertThatIsNegativeInfinityFails(null);
  }