Monks, again I commit the sin of Not Understanding It.

I am working with code that talks to a serial port. 

    $port = new Device::SerialPort("/dev$opt_p");

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followed by 
write_chunk ("modem control stuff");

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where 
sub write_chunk {
    (my $count) = $port->write($_[0]);
}

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so to test it I put 

if ($TESTING) {
    use Test::MockObject;
    $port = Test::MockObject->new();
    $port->mock ('write',
                 sub {my $arg=shift;print "wrote $arg to the serial po
+rt\n"} 
);
}
else {
    $port = new Device::SerialPort("/dev/$opt_p");
}

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So I would hope to see things like

wrote ATZ\r to the serial port

Instead I see

wrote Test::MockObject=HASH(0x885d760) to the serial port

The doc for Test::MockObject says 

    * "mock(*name*, *coderef*)"
        Adds a coderef to the object. This allows code to call the nam
+ed
        method on the object. For example, this code:

            my $mock = Test::MockObject->new();
            $mock->mock( 'fluorinate',
                sub { 'impurifying precious bodily fluids' } );
            print $mock->fluorinate;

        will print a helpful warning message.

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Clearly I get a helpful message showing me that the sub has been called. But I infer that the sub I provide in the mock ('write', ...) statement does not get the arguments that are provided to the write.

Is there something I am missing?

Everybody knows signatures don't exist

In reply to Test::MockObject not showing args when mocking a sub by jvector

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