Excessive tracebacks

[pfctdayelise]

I'm struggling to get tracebacks in pytest-bdd tests down to a manageable size. --tb=short doesn't do too much. It seems to be worst on given steps.

Even on a simple failure within my given step, there are 12 lines of traceback, 3 of pytest-bdd internals and 9 of pytest internals. Is there something pytest-bdd can do to suppress these from the output?

example.feature

Scenario: Checking tracebacks
    Given a scenario
    When it fails
    Then there should be a readable traceback

test_example.py

from pytest_bdd import scenario, given, when, then, parsers
@scenario('example.feature', 'Checking tracebacks')
def test_traceback():
    pass
@given(parsers.parse('a {noun:w}'))
def given(noun):
    assert noun == 'banana'

@when('it fails')
def when():
    pass

@then(parsers.parse('there should be a {adjective:w} traceback'))
def then(adjective):
    pass

Output

(bdd-examples-project) bjl@BJL-LAP:/mnt/c/Users/bjl/wsl/bdd-examples-project/tests/features$ pytest -k 'test_traceback -traceback2' --tb=short

============================================================================================================ test session starts ============================================================================================================
platform linux -- Python 3.6.7, pytest-4.4.1, py-1.8.0, pluggy-0.9.0
rootdir: /mnt/c/Users/bjl/wsl/bdd-examples-project/tests, inifile: pytest.ini
plugins: bdd-3.1.0
collected 26 items / 25 deselected / 1 selected

steps/test_example.py F                                                                                                                                                                                                               [100%]

================================================================================================================= FAILURES ==================================================================================================================
______________________________________________________________________________________________________________ test_traceback _______________________________________________________________________________________________________________
steps/test_example.py:32: in test_traceback
    def test_traceback():
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/pytest_bdd/scenario.py:195: in _execute_scenario
    _execute_step_function(request, scenario, step, step_func)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/pytest_bdd/scenario.py:136: in _execute_step_function
    step_func(**kwargs)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/pytest_bdd/steps.py:164: in step_func
    result = request.getfixturevalue(func.__name__)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/_pytest/fixtures.py:478: in getfixturevalue
    return self._get_active_fixturedef(argname).cached_result[0]
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/_pytest/fixtures.py:501: in _get_active_fixturedef
    self._compute_fixture_value(fixturedef)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/_pytest/fixtures.py:586: in _compute_fixture_value
    fixturedef.execute(request=subrequest)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/_pytest/fixtures.py:895: in execute
    return hook.pytest_fixture_setup(fixturedef=self, request=request)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/pluggy/hooks.py:289: in __call__
    return self._hookexec(self, self.get_hookimpls(), kwargs)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/pluggy/manager.py:68: in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/pluggy/manager.py:62: in <lambda>
    firstresult=hook.spec.opts.get("firstresult") if hook.spec else False,
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/_pytest/fixtures.py:937: in pytest_fixture_setup
    result = call_fixture_func(fixturefunc, request, kwargs)
/home/bjl/.local/share/virtualenvs/bdd-examples-project-dSboamh_/lib/python3.6/site-packages/_pytest/fixtures.py:794: in call_fixture_func
    res = fixturefunc(**kwargs)
steps/test_example.py:38: in given
    assert noun == 'banana'
E   AssertionError: assert 'scenario' == 'banana'
E     - scenario
E     + banana

(The long paths to pipenv's virtualenv are also certainly not helping...)