@Test
public void testGetArrayCopy() {

    double[] arrayRef;
    arrayRef = emptyVector.getArrayRef();
    assertTrue(arrayRef != emptyVector.getArrayCopy());
    assertThat(arrayRef, is(equalTo(emptyVector.getArrayCopy())));
    arrayRef = array5Vector.getArrayRef();
    assertTrue(arrayRef != array5Vector.getArrayCopy());
    assertThat(arrayRef, is(equalTo(array5Vector.getArrayCopy())));
}