@Test
public void arrayOfTwosAutocorrelationReturnsAValueEqualToLengthMinusLagTimesFour() {
for (int i = 0; i < arrayOfTwos.length; i++) {
double autocorrelate = autocorrelation.autocorrelate(arrayOfTwos, i);
assertThat(autocorrelate, is(equalTo((arrayOfTwos.length - i) * 4.0d)));
}
}
@Test(expected = IndexOutOfBoundsException.class)
public void lagUpperBoundIsTestedBeforeMethodExecutes() {
autocorrelation.autocorrelate(arrayOfTwos, arrayOfTwos.length + 1);
}