Can PyCharm drop into debug when py.test tests fail

Question

When running tests with py.test there is a --pdb option to enter pdb on failure.

Is there a similar way to enter the debugger when running the same test from within PyCharm?

Jahnke

Possible duplicate of Debugging pytest post mortem exceptions in pycharm/pydev – Polyanthus

Answer 1

There is a py.test plugin, pytest-pycharm, that will halt the PyCharm debugger when a test emits an uncaught exception.

Jahnke

Great! Thanks a lot! Can you give a couple of words on how it is working?.. By just being installed in Python and without any modifications to projects? – Puttergill

It is enough to have it installed so that py.test finds it as a plugin an use the callback when an exception is encountered. So there is no need to modify any project apart from having it installed in the python runtime. – Utrillo

Is there a way to stop on breakpoints (set in tests from within PyCharm)? – Polyanthus

This doesn't seem to work when using pyenv, as it uses shell-script shims to wrap python programs such as pytest, and his means that PyCharm is not directly running a Python program, so cannot engage the debugger. – Kristy

Doesn't work for me, at least not when I simply select 'Debug [mytest]'. – Urbanity

Answer 2

Follow the steps below to setup the correct run configuration:

1. Run > Edit Configurations...
2. Click the '+' button to add a new configuration.
3. Name the configuration and specify the configuration parameters below:

Script: The path to your py.test executable (find by typing which py.test)

Script Parameters: This parameter is your test case followed by the --pdb option (ie /Users/Johan/projects/misc/testing.py --pdb)

After setting up the configuration, you can run the test case from within PyCharm. If a test case fails, your PyCharm run window will show the pdb prompt.

Sejm

Maybe I was not clear enough in my question, but I was hoping for a way to enter the PyCharm debugger on failure. But this answer is still better than nothing. – Utrillo

In PyCharm 2016.2, I see "entering PDB" in the Run window, and I can type text (echoes in green), but it does not seem to be an active pdb prompt. – Kristy

Answer 3

If breakpoints work, but just drop into debug does not happen, check
File > Settings > Build, Execution, Deployment > Python Debugger > Drop into debugger on failed tests.

Hasidism