assertEquals('P', messageBytes[6]);
        assertEquals(0, messageBytes[7]); // Null terminator
    }

    @Test
    @DisplayName("Should include message type indicator")
    void testMessageTypeIndicator() throws IOException {
        // When
        Type1Message type1 = new Type1Message(mockContext);
        byte[] messageBytes = type1.toByteArray();

        // Then

        assertEquals('P', messageBytes[6]);
        assertEquals(0, messageBytes[7]); // Null terminator
    }

    @Test
    @DisplayName("Should include message type indicator")
    void testMessageTypeIndicator() throws Exception {
        // Given
        Type2Message type2 = createMockType2Message();
        Type3Message type3 = new Type3Message(createMockContext(), type2, null, "password", "DOMAIN", "user", "WORKSTATION", 0);