@Test
  public void getFirst_empty_returnsNull() {
    Object[] emptyArray = new Object[0];
    assertThat((Object[]) getFirst(emptyArray)).isNull();
  }
Unit tests for {@link ArrayUtils}.

@since GemFire 7.x
geode-core/src/test/java/org/apache/geode/internal/util/ArrayUtilsTest.java