Test: add test for utils.py funcions.

[ayushjariyal]

I noticed that there is no test for utils.py file in grass/jupyter/test directory.
so, In this PR, I add tests for get_region and get_location_proj_string function of utils.py file.
I verify these test by locally running pytest

[ayushjariyal]

@petrasovaa, I am not able to change the title of this PR. could you please do that so that it can pass the test and please review this PR.

[ayushjariyal]

@petrasovaa, It looks like pytest is failing because these tests require an active GRASS session. Locally they pass when run inside a GRASS session, but in CI, the session does not seem to be initialized.
Could you please let me know whether this is a CI setup issue or something caused by my changes?

[gulshan-123]

i believe you should use something like this (see conftest.py under tests):

with gs.setup.init(project):
      ....

Basically, gs.setup.init starts the session.

Also, to check whether this succeeds or not, I run the pytest in linux terminal (not in the grass terminal).
For this, you may have to do:

make

Then note the output of ./bin.x86_64-pc-linux-gnu/grass --config python_path
export PYTHONPATH=$PYTHONPATH:<Output Of Above>

Now run pytest to see if it succeeds...