Unit tests for has reverse twice

/**
 * Unit tests for the has reverse twice problem: Given two arrays, a1 and a2, determine if the reverse of a2 is found inside a1 twice.
 * @author SShipp
 */
@Test
public void testHasReverseTwice() {
        //hasMirrorTwice(a1, a2) should return true...matches found at indices 2,3 and 7,8
        int[] a1 = {6, 1, 2, 1, 3, 1, 3, 2, 1, 5};
        int[] a2 = {1, 2};
        assertTrue(hasReverseTwice(a1,a2));

        //hasMirrorTwice(a3, a4) should return false
        int[] a3 = {5, 8, 4, 18, 5, 42, 4, 8, 5, 5};
        int[] a4 = {4, 8, 5};
        assertFalse(hasReverseTwice(a3,a4));

        //hasMirrorTwice(a5, a6) should return true, matches at indices 1,2 and 8,9
        int[] a5 = {6, 3, 42, 18, 12, 5, 3, 42, 3, 42};
        int[] a6 = {42, 3};
        assertTrue(hasReverseTwice(a5,a6));

        //hasMirrorTwice(a7, a8) should return false, matches at indices 1-6 but the match at 5-10 overlaps and is invalid
        int[] a7 = {6, 1, 2, 4, 2, 1, 2, 4, 2, 1, 5};
        int[] a8 = {1, 2, 4, 2, 1};
        assertFalse(hasReverseTwice(a7,a8));


        //hasMirrorTwice(a9, aa) should return true, matches at index 0 and index 1
        int[] a9 = {0, 0};
        int[] aa = {0};
        assertTrue(hasReverseTwice(a9,aa));

        //hasMirrorTwice(ab, ac) should return false, ac is longer than ab and thus can't be found in ab
        int[] ab = {8, 9, 2, 1};
        int[] ac = {5, 7, 1, 2, 9, 8};
        assertFalse(hasReverseTwice(ab,ac));

        //hasMirrorTwice with one empty array or two empty arrays should return false
        int[] ad = {};
        int[] ae = {1,2,3};
        assertFalse(hasReverseTwice(ad,ae));
        assertFalse(hasReverseTwice(ae,ad));

        //hasMirrorTwice with one or both null arrays should return false
        assertFalse(hasReverseTwice(ae, null));
        assertFalse(hasReverseTwice(null, ae));
        assertFalse(hasReverseTwice(null,null));
}