Enforce the use of a virtual environment in the integration testing script.

[jatkinson1000]

Closes #265

Enforces use of a venv through setting PIP_REQUIRE_VIRTUALENV=true in the unix tests script.

Running without a virtual environment will give:

./run_test_suite.sh --verbose --integration-only
ERROR: Could not find an activated virtualenv (required).
Error: Process completed with exit code 3.

[jwallwork23]

I can confirm that this does the trick, although I get a different output to what you mention in the PR because the system python first in my path doesn't have pip installed:

$ ./run_test_suite.sh --verbose --integration-only
/usr/local/bin/python: No module named pip

If I switch to python3 -m pip -q install ... in the script then I get the expected error.

[matthewfeickert]

I can confirm that this does the trick, although I get a different output to what you mention in the PR because the system python first in my path doesn't have pip installed:

$ ./run_test_suite.sh --verbose --integration-only
/usr/local/bin/python: No module named pip

If I switch to python3 -m pip -q install ... in the script then I get the expected error.

The relevant bit is that your not in a virtual environment and there is no need to specify python3. The error that you're getting is a different unrelated one and if you were in a virtual environment python would be python3 already.

You're simply hitting the fact that you're trying to use the system Python for your own personal use, which you should never do. The system Python is its Python and you should act like it doesn't exist to you. If you want to use Python as a developer or user you should install your own.

The PR looks great though!

(edit: Rereading your original comment I think I'm just telling you things that you already know. Sorry for noise in that case. 😬 )

[jwallwork23]

You're simply hitting the fact that you're trying to use the system Python for your own personal use, which you should never do. The system Python is its Python and you should act like it doesn't exist to you. If you want to use Python as a developer or user you should install your own.

Agreed, I usually use virtual environments for everything.

(edit: Rereading your original comment I think I'm just telling you things that you already know. Sorry for noise in that case. 😬 )

No worries!