grass.jupyter: Fix session tests on Windows

[echoix]

The interpolated path strings aren't escaped when evaluated, so using a raw string allows C:\Users to not have an invalid \U escape sequence.

[wenzeslaus]

The diff is okay, but I find this hard to believe and would prefer the original, simpler code. Can you provide a code example or an article? I can't find or reproduce anything myself.

[echoix]

It is quite simple, as the alternative is to find a way to re-escape the string from an evaluated path.

Take a look at a run on main, the script that is saved and executed doesn't have the backslashes escaped anymore, since it was evaluated when the file was written from a string. https://github.com/OSGeo/grass/actions/runs/10992700384/job/30517619655#step:12:857

---------------------------- Captured stderr call -----------------------------
  File "C:\Users\runneradmin\AppData\Local\Temp\pytest-of-runneradmin\pytest-0\test_init_finish0\script.py", line 5

    gs.core._create_location_xy("C:\Users\runneradmin\AppData\Local\Temp\pytest-of-runneradmin\pytest-0\test_init_finish0", "test")

                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated \UXXXXXXXX escape

From the next test (but we can see the equivalent way up), the tmp_path fixture is given as a pathlib Path, like:

tmp_path = WindowsPath('C:/Users/runneradmin/AppData/Local/Temp/pytest-of-runneradmin/pytest-0/test_init_with_auto_finish0')

At the next test, we also see what an escaped path would look like:

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
python\grass\jupyter\tests\grass_jupyter_session_test.py:19: in run_in_subprocess
    process = subprocess.run(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

input = None, capture_output = False, timeout = None, check = True
popenargs = (['C:\\OSGeo4W\\bin\\python3.exe', 'C:\\Users\\runneradmin\\AppData\\Local\\Temp\\pytest-of-runneradmin\\pytest-0\\test_init_with_auto_finish0\\script.py'],)
kwargs = {'stdout': -1, 'text': True}
process = <Popen: returncode: 1 args: ['C:\\OSGeo4W\\bin\\python3.exe', 'C:\\Users\\ru...>
stdout = '', stderr = None, retcode = 1

[echoix]

Note that the script here is just a string, that is then called, its not Python code yet..

[wenzeslaus]

Note that the script here is just a string, that is then called, its not Python code yet..

That's the part I missed! Thanks for pointing that out.