Environment is not populated when using pytest-xdist

[davehunt]

The environment section in the HTML report is missing when we run tests in parallel using pytest-xdist. I'm hoping that @RonnyPfannschmidt can take a look and suggest how we can fix it. 😄

[RonnyPfannschmidt]

its impossible to share the information as is

the current implementation basically relies on "global variables"

pytest-xdist has the concept of a slaveoutput, which i a dictionary

you can pass normal strings/numbers with ease using that

the objects you should interact with on the slave are
config.slaveinput and config.slaveoutput

to finish the reporting there is a hook called pytest_testnodedown(node, error)
the node will have a slaveoutput attribute matching the dictionary of the slave

so you can just set config.slaveoutput['environment'] = environment and access it on the master in the testnodedown hook and add each nodes environment to a list for use in reporting

to handle configuration there is the pytest_configure_node(node) hook, the node will have a slaveinput attribute where you can add extra inputs

[davehunt]

Thanks @RonnyPfannschmidt, I've been able to fix this in pull #19. Would you be able to take a look and let me know if there's anything concerning in my changes?