assertEquals("c", raf.readLine());

        when(raf.read()).thenReturn(-1);
        assertNull(raf.readLine());
    }

    @Test
    @DisplayName("readUTF(): decodes bytes after size prefix")
    void readUTF_decodes() throws Exception {
        SmbRandomAccessFile raf = spy(newInstance("r", false, false, false));
        // Size prefix 3, then bytes for "abc"

            }
        }

        if (c == -1 && input.length() == 0) {
            return null;
        }

        return input.toString();
    }

    @Override
    public final String readUTF() throws SmbException {
        final int size = readUnsignedShort();
        final byte[] b = new byte[size];
        read(b, 0, size);
        try {
            return Encdec.dec_utf8(b, 0, size);

            }
        }

        if (c == -1 && input.length() == 0) {
            return null;
        }

        return input.toString();
    }

    @Override
    public final String readUTF() throws SmbException {
        final int size = readUnsignedShort();
        final byte[] b = new byte[size];
        read(b, 0, size);
        try {
            return Encdec.dec_utf8(b, 0, size);