How to only show failing tests from behave?

Question

I've got a Python 3.4 project with tests built in the behave framework (version 1.2.5). When I run the tests, I get several hundred lines of output, most of it describing steps that passed with no problems. When a scenario fails, I need to scroll through all this output looking for the failure (which is easy to notice because it's red while the passing steps are green, but I still need to look for it).

Is there a way to make behave only show output for failing scenarios? Ideally, I'd have the output from all failing scenarios and the summary at the end of how many features/scenarios/steps were passed/failed/skipped. I'd also be content if it printed everything out but put all the failures at the bottom.

I've run behave --help and looked through this website, but didn't find anything relevant. and yet, surely I'm not the first person to get annoyed at this, and I imagine there's some way to do it. Thanks for the help!

edit: the --quiet flag simplifies the output, but does not remove it. For example, this output:

Scenario Outline: Blank key identification -- @1.3 blank checks # tests/features/tkg.feature:15 Given we have pages with the wrong checksum # tests/features/steps/tkg_tests.py:30 0.000s When we check if the key is blank # tests/features/steps/tkg_tests.py:50 0.000s Then it is not blank # tests/features/steps/tkg_tests.py:55 0.000s

when run with the --quiet flag becomes:

Scenario Outline: Blank key identification -- @1.3 blank checks Given we have pages with the wrong checksum # 0.000s When we check if the key is blank # 0.000s Then it is not blank # 0.000s

but it's still the same number of lines long.

Answer 1

You can use the --format option with progress or progress2 formatter.

This will not show the output for not failing tests (though it will still show the file names). The progress2 option displays the traceback for the failing tests.