Document how to run tests locally

[dokterbob]

As a contributor, I was unable to successfully run the tests locally. It would be great to have a few lines in the README on how to do this, without having to plough through or know much about the actual tooling to use.

Note that in the case of the more likely contributions, it would make most sense to be able to run a single pass of the tests on whatever locally installed Python, as to have a quicker evaluation - and to have the CI take care of more extensive platform-testing.

[dokterbob]

Specifically:

1. A single command to install test dependencies pip install tox (or whatever is required)
2. A single command to run the tests, e.g. tox

Obviously, I would not be writing this unless I would have certainty that the above commands are valid. ;)

[ntninja]

True, true. I'll add that to README!

It's tox -e py3 for just the tests, but tox (without anything) works too. However the test suite requires the go-IPFS ipfs binary to be in ${PATH} or the integration test suit will be skipped. Could be that it just fails altogether though, I never actually tried running it like this.

[c0llab0rat0r]

the test suite requires the go-IPFS ipfs binary to be in ${PATH} or the integration test suit will be skipped.

This being the case, it would also be helpful to have instructions on how to install go-IPFS

[ntninja]

I've added a section to the README that should explain this essential process: https://github.com/ipfs-shipyard/py-ipfs-http-client#setting-up-a-local-development-environment

Feedback? Anything that should be expended upon?

[c0llab0rat0r]

Feedback in #270.

https://pypi.org/project/pytest-docker/ is a potential future improvement on this.

[dokterbob]

the test suite requires the go-IPFS ipfs binary to be in ${PATH} or the integration test suit will be skipped.

This being the case, it would also be helpful to have instructions on how to install go-IPFS

Just a link to the go-ipfs documentation on this should suffice, and of course mentioning that it is a requirement for testing.

[c0llab0rat0r]

@dokterbob do you have any follow up questions on this?