This report is a little corner case. But I report for ensure a good quality and avoid future mistakes.

I made four test cases regarding Soup.Address in python binding.

I test corner cases for ports. Since I can have users with errors or mistakes in configs, it could be propagated in my code. So the test are for negative ports, port as strings, floats or floats with decimals no rounded. This no detect all problems, but I find special the 1º test with a confuse message exception (maybe it is a problem with pygobject print message). Also in floats, the conversion is made automatically, and no warning is launched, so if a float value is casted to int wrongly, you could get a different port in a special case.

The examples:

from gi.repository import Soup 

# 1º test case
address = '127.0.0.1'
port = -1 # integer negative  => confuse message, probably a error parsing message exception data

try:
    interface = Soup.Address.new(address, port)
except ValueError as e: # Validate and catch errors introduced by the user, just in case
    print ('Error creating address ' + address + ' for port ' + str(port) + ': ' + str(e)) 
    
# 2º test case
address = '127.0.0.1'
port = 'nointegervalue' # string => good exception message

try:
    interface = Soup.Address.new(address, port)
except ValueError as e: # Validate and catch errors introduced by the user, just in case
    print ('Error creating address ' + address + ' for port ' + str(port) + ': ' + str(e)) 
except TypeError as e:
    print ('Error creating address ' + address + ' for port ' + str(port) + ': ' + str(e)) 

# 3º test case    
address = '127.0.0.1'
port = 80.000 # float => automatic casting to 80 without warning

try:
    interface = Soup.Address.new(address, port)
except ValueError as e: # Validate and catch errors introduced by the user, just in case
    print ('Error creating address ' + address + ' for port ' + str(port) + ': ' + str(e)) 
   
interface.resolve_sync(None)
print ('Port:' + str(interface.get_port()))

# 4º test case   
address = '127.0.0.1'
port = 80.001 # float with decimals  => automatic casting to 80 without warning

try:
    interface = Soup.Address.new(address, port)
except ValueError as e: # Validate and catch errors introduced by the user, just in case
    print ('Error creating address ' + address + ' for port ' + str(port) + ': ' + str(e)) 
    
interface.resolve_sync(None)
print ('Port:' + str(interface.get_port()))

"""
Result:
$ python3 test.py 
Error creating address 127.0.0.1 for port -1: %lli not in range %i to %u
Error creating address 127.0.0.1 for port nointegervalue: Must be number, not str
Port:80
Port:80
"""