void testConstructorWithNormalKey() {
        // Test constructor with a normal length key
        HMACT64 hmac = new HMACT64(TEST_KEY);
        assertNotNull(hmac);
    }

    @Test
    void testConstructorWithLongKey() {
        // Test constructor with a key longer than BLOCK_LENGTH (64 bytes)
        // HMACT64 truncates keys at 64 bytes
        HMACT64 hmac = new HMACT64(LONG_TEST_KEY);
        assertNotNull(hmac);
    }

            assertNotNull(hmac);
            verify(mockMd5, times(1)).reset();
            verify(mockMd5, times(1)).update(any(byte[].class)); // Should update with ipad
        }
    }

    @Test
    void testConstructorWithLongKey() throws NoSuchAlgorithmException {
        // Test constructor with a key longer than BLOCK_LENGTH (64 bytes)
        try (MockedStatic<Crypto> mockedCrypto = mockStatic(Crypto.class)) {