Pytest plugin to enable test scenarios. A test scenario is a series of related tests where sequential successful execution is important.

test_scenario.py

import py
import pytest

'''
Automatically xfail remaining tests if previous test failed.  Tests will
continue to run if:
 * the result is skip
 * the result is xfail
 * the test is marked as nondestructive

For more information, refer to
http://stackoverflow.com/questions/12411431/pytest-how-to-skip-the-rest-of-tests-in-the-class-if-one-has-failed/12579625#12579625
'''

def pytest_runtest_makereport(item, call):
    if "incremental" in item.keywords \
       and "destructive" in item.keywords \
       and call.excinfo is not None \
       and not any([call.excinfo.errisinstance(py.test.xfail.Exception),
                    call.excinfo.errisinstance(py.test.skip.Exception)]):

        parent = item.parent
        parent._previousfailed = item

def pytest_runtest_setup(item):
    previousfailed = getattr(item.parent, "_previousfailed", None)
    if previousfailed is not None:
        pytest.xfail("previous test failed (%s)" %previousfailed.name)

Thanks for sharing, exactly what I was looking for. One hint:

    call.excinfo.errisinstance((pytest.xfail.Exception, pytest.skip.Exception)):

does the trick and is easier to read. It's a simple instance check, which also accepts tuples of several types in question.