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Use tox-venv to allow tests to run on OSX (#131)

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Installing `tox-venv` on OSX allows `tox` tests to be run, per https://community.home-assistant.io/t/installing-hass-on-macos-osx/69292

Alternatively, `tox-venv` _could_ be added directly into the https://github.com/home-assistant/home-assistant/blob/dev/script/bootstrap file, but since nobody outside of OSX developers seem to be having this problem it seemed safer to simply note it in the documentation.

Without installing `tox-venv` the following occurs:

    ERROR: invocation failed (exit code 100), logfile: /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/.tox/py37/log/py37-0.log
    ERROR: actionid: py37
    msg: getenv
    cmdargs: '/Users/neilcrosby/Documents/git-projects.nosync/home-assistant/bin/python3 -m virtualenv --python /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/bin/python3 py37'
    
    /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/lib/python3.7/site-packages/virtualenv.py:1041: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
      import imp
    Already using interpreter /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/bin/python3
    Using base prefix '/usr/local/bin/../Cellar/python/3.7.0/bin/../Frameworks/Python.framework/Versions/3.7'
    New python executable in /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/.tox/py37/bin/python3
    Also creating executable in /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/.tox/py37/bin/python
    ERROR: The executable /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/.tox/py37/bin/python3 is not functioning
    ERROR: It thinks sys.prefix is '/usr/local/Cellar/python/3.7.0/Frameworks/Python.framework/Versions/3.7' (should be '/Users/neilcrosby/Documents/git-projects.nosync/home-assistant/.tox/py37')
    ERROR: virtualenv is not compatible with this system or executable
    
    ERROR: Error creating virtualenv. Note that some special characters (e.g. ':' and unicode symbols) in paths are not supported by virtualenv. Error details: InvocationError('/Users/neilcrosby/Documents/git-projects.nosync/home-assistant/bin/python3 -m virtualenv --python /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/bin/python3 py37 (see /Users/neilcrosby/Documents/git-projects.nosync/home-assistant/.tox/py37/log/py37-0.log)', 100)
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Neil Crosby 2018-10-23 20:45:34 +01:00 committed by Paulus Schoutsen
parent ce18852db3
commit 62b585644d
1 changed files with 2 additions and 0 deletions
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docs/development_testing.md
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@ -18,6 +18,8 @@ Running Tox will run unit tests against the locally available Pythons, as well a
Tox uses virtual environments under the hood to create isolated testing environments. The tox virtual environments will get out-of-date when requirements change, causing test errors. Run `tox -r` to tell Tox to recreate the virtual environments.
OSX users may see an `Error creating virtualenv` when runnng `tox`. If this occurs, install the [tox-venv](https://pypi.org/project/tox-venv/) package using the command `pip install tox-venv` and try again.
### Adding new dependencies to test environment
If you are working on tests for a component or platform and you need the dependencies available inside the Tox environment, update the list inside `script/gen_requirements_all.py`. Then run the script and then run `tox -r` to recreate the virtual environments.