// Create a mock DfsReferralData object
        DfsReferralData mockData = mock(DfsReferralData.class);
        String expectedToString = "Mock DfsReferralData";

        // Define the behavior of the mock's toString() method
        when(mockData.toString()).thenReturn(expectedToString);

        // Create a DfsReferral instance with the mock data
        DfsReferral dfsReferral = new DfsReferral(mockData);

        NbtException exception = new NbtException(errorClass, errorCode);

        String expectedToString = "errorClass=" + errorClass + ",errorCode=" + errorCode + ",errorString="
                + NbtException.getErrorString(errorClass, errorCode);

        assertEquals(expectedToString, exception.toString(), "toString output should match the expected format");
    }

    /**

            String result = message.toString();

            // Then
            String expectedToString = "Type2Message[target=" + TEST_TARGET + ",challenge=<8 bytes>" + ",context=<8 bytes>"
                    + ",targetInformation=<3 bytes>" + ",flags=0x" + Hexdump.toHexString(message.getFlags(), 8) + "]";
            assertEquals(expectedToString, result);
        }

        @Test