new char[] {'0', '1', '2', '3', '4', '5', '6'},
        -1,
        3,
        7,
        new char[] {'0', '1', '2', '4', '5', '6', '3'});
    testRotate(
        new char[] {'0', '1', '2', '3', '4', '5', '6'},
        0,
        3,
        7,
        new char[] {'0', '1', '2', '3', '4', '5', '6'});
    testRotate(
        new char[] {'0', '1', '2', '3', '4', '5', '6'},
        1,
        3,

    testRotate(new double[] {0, 1, 2, 3, 4, 5, 6}, -4, 3, 7, new double[] {0, 1, 2, 3, 4, 5, 6});
    testRotate(new double[] {0, 1, 2, 3, 4, 5, 6}, -3, 3, 7, new double[] {0, 1, 2, 6, 3, 4, 5});
    testRotate(new double[] {0, 1, 2, 3, 4, 5, 6}, -2, 3, 7, new double[] {0, 1, 2, 5, 6, 3, 4});
    testRotate(new double[] {0, 1, 2, 3, 4, 5, 6}, -1, 3, 7, new double[] {0, 1, 2, 4, 5, 6, 3});

    testRotate(new int[] {0, 1, 2, 3, 4, 5, 6}, -4, 3, 7, new int[] {0, 1, 2, 3, 4, 5, 6});
    testRotate(new int[] {0, 1, 2, 3, 4, 5, 6}, -3, 3, 7, new int[] {0, 1, 2, 6, 3, 4, 5});
    testRotate(new int[] {0, 1, 2, 3, 4, 5, 6}, -2, 3, 7, new int[] {0, 1, 2, 5, 6, 3, 4});
    testRotate(new int[] {0, 1, 2, 3, 4, 5, 6}, -1, 3, 7, new int[] {0, 1, 2, 4, 5, 6, 3});

    testRotate(new short[] {0, 1, 2, 3, 4, 5, 6}, -4, 3, 7, new short[] {0, 1, 2, 3, 4, 5, 6});
    testRotate(new short[] {0, 1, 2, 3, 4, 5, 6}, -3, 3, 7, new short[] {0, 1, 2, 6, 3, 4, 5});
    testRotate(new short[] {0, 1, 2, 3, 4, 5, 6}, -2, 3, 7, new short[] {0, 1, 2, 5, 6, 3, 4});
    testRotate(new short[] {0, 1, 2, 3, 4, 5, 6}, -1, 3, 7, new short[] {0, 1, 2, 4, 5, 6, 3});

0x19a4c116, 0, 1, 2, 3, 4, 5, 6, 7) SHA256ROUND1(49, 0x1e376c08, 7, 0, 1, 2, 3, 4, 5, 6) SHA256ROUND1(50, 0x2748774c, 6, 7, 0, 1, 2, 3, 4, 5) SHA256ROUND1(51, 0x34b0bcb5, 5, 6, 7, 0, 1, 2, 3, 4) SHA256ROUND1(52, 0x391c0cb3, 4, 5, 6, 7, 0, 1, 2, 3) SHA256ROUND1(53, 0x4ed8aa4a, 3, 4, 5, 6, 7, 0, 1, 2) SHA256ROUND1(54, 0x5b9cca4f, 2, 3, 4, 5, 6, 7, 0, 1) SHA256ROUND1(55, 0x682e6ff3, 1, 2, 3, 4, 5, 6, 7, 0) SHA256ROUND1(56, 0x748f82ee, 0, 1, 2, 3, 4, 5, 6, 7) SHA256ROUND1(57, 0x78a5636f, 7, 0, 1, 2, 3, 4, 5,...

</p>

<p>
Examples:
</p>

<pre>
var a = [...]int{0, 1, 2, 3, 4, 5, 6, 7}
var s = make([]int, 6)
var b = make([]byte, 5)
n1 := copy(s, a[0:])            // n1 == 6, s is []int{0, 1, 2, 3, 4, 5}
n2 := copy(s, s[2:])            // n2 == 4, s is []int{2, 3, 4, 5, 4, 5}
n3 := copy(b, "Hello, World!")  // n3 == 5, b is []byte("Hello")
</pre>

		// if there is data following that NUL character.
		// This is reasonable as GNU long names are C-strings.
		file: "testdata/gnu-long-nul.tar",
		headers: []*Header{{
			Name:     "0123456789",
			Mode:     0644,
			Uid:      1000,
			Gid:      1000,
			ModTime:  time.Unix(1486082191, 0),
			Typeflag: '0',
			Uname:    "rawr",
			Gname:    "dsnet",
			Format:   FormatGNU,
		}},

hcs,w??w!.&hcs,zib,???g&2&4wq55--nx?8zrf6--nx??3&44sd3--nx?91w6j--nx!.&a5wqmg--nx?d&22svcw--nx?5xq55--nx??gla0do--nx?m1qtxm--nx?vta0cu--nx????455ses--nx?5mzt5--nx?69vqhr--nx?7&8a4d5a4prebgm--nx?rb2c--nx??a!.&gro?jbo,mo&c?n??oc?ten??vd??b!.&0?1?2?3?4?5?6?7?8?9?a?b?c?d?e?f?g?h?i?j?k?l?m?n?o?p?q?r?s?t?u?v?w?x?y!srab,?z???c!b?za9a0cbgm--nx??e!.&ca?em!an??gro?ics?lim?moc?nue?ofni?t&en?rops??ude?v&og?t???a??g!.&gro?hsadtob,lenap:.nomead,,oc?saak,t&en?ikcats,?ylp.6d,??i&a?v??k!.&gro?lim?moc?su,ten?ude?...