@Test
public void whenInputIsStringOutputShouldBeHashed() {

    byte[] hash = Sha256.hash("test");
    Assert.assertTrue("Hash must be 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08",
            Arrays.equals(ByteUtils.hexStringToByteArray("9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"), hash));
}