@Test public void testDecryptDESKeyThrowsNullPointerException() throws Throwable { byte[] encryptedDESKey = new byte[2]; try { new JCEHandler((Provider) null).decryptDESKey((short) 100, encryptedDESKey, null, true); fail("Expected NullPointerException to be thrown"); } catch (NullPointerException ex) { assertNull("ex.getMessage()", ex.getMessage()); } }