How to test the changes done in sympy

[Praneeth Shetty]

I recently started Open-Sourcing.....
As I was Familiar with Python and Sympy. I installed the repository successfully and am trying to fix some bugs to get familiar with its directories and code flow. So I just needed to know that how to build the sympy or how to test the changes that I have done in the codes....

Regards,

Praneeth

[gu...@uwosh.edu]

Praneeth,

I agree this can be confusing. To get started testing your code you will need some things installed in your venv:

1. pytest

2. pytest-doctestplus

3. pyflakes

You can see what is installed if you are in your venv shell (`pipenv shell` to enter if you are using pipenv), using the `pip list` command.

Within your environment all three of these tools can be installed using statements of the form `pip install -U ...`.

Once these are installed you need to use `pyflakes` to check format, syntax and simple coding mistakes. Then `pytest` for running tests. I suggest your start by running these only on the parts of the code you are working on. For example if you modified the file `ppp.py` then you should run do the following different runs:

```

pyflakes <path-to>/ppp.py

[read the output carefully]

pytest <path-to>/test_ppp.py

[read the output carefully]

pytest --doctest-plus <path-to>/ppp.py

[read the output carefully]

```

Where <path-to> needs to be replaced with the appropriate path in your directory structure.

If you think what you are doing might impact other parts of the code you can just run a bare `pytest` command. This will take a long time (many hours unless you have a very fast machine and break it up into separate processes) as it will run all the tests in sympy.

Hope this helps.

JG