@SuppressWarnings("ConstantConditions")
@Test public void testEncryptNullValue() {

	// Arrange:
	final Encrypto mockEncrypto = mock(Encrypto.class);
	// Act:
	final String encrypted = CryptographyUtils.encrypt(null, mockEncrypto);
	// Assert:
	assertThat(encrypted, is(nullValue()));
	verifyZeroInteractions(mockEncrypto);
}