How to save pytest's results/logs to a file?

Question

I am having trouble trying to save -all- of the results shown from pytest to a file (txt, log, doesn't matter). In the test example below, I would like to capture what is shown in console into a text/log file of some sort:

import pytest import os  def test_func1():     assert True   def test_func2():     assert 0 == 1  if __name__ == '__main__':      pytest.main(args=['-sv', os.path.abspath(__file__)]) 

Console output I'd like to save to a text file:

test-mbp:hi_world ua$ python test_out.py ================================================= test session starts ================================================= platform darwin -- Python 2.7.6 -- py-1.4.28 -- pytest-2.7.1 -- /usr/bin/python rootdir: /Users/tester/PycharmProjects/hi_world, inifile:  plugins: capturelog collected 2 items   test_out.py::test_func1 PASSED test_out.py::test_func2 FAILED  ====================================================== FAILURES ======================================================= _____________________________________________________ test_func2 ______________________________________________________      def test_func2(): >       assert 0 == 1 E       assert 0 == 1  test_out.py:9: AssertionError ========================================= 1 failed, 1 passed in 0.01 seconds ========================================== test-mbp:hi_world ua$  

Answer 1

It appears that all of your test output is going stdout, so you simply need to “redirect” your python invocation's output there:

python test_out.py >myoutput.log 

You can also “tee” the output to multiple places. E.g., you might want to log to the file yet also see the output on your console. The above example then becomes:

python test_out.py | tee myoutput.log 

Answer 2

I derive this from pastebin as suggest by Bruno Oliveira :

#!/usr/bin/env python # -*- coding: utf-8 -*-  """ Pytest Plugin that save failure or test session information to a file pass as a command line argument to pytest.  It put in a file exactly what pytest return to the stdout.  To use it : Put this file in the root of tests/ edit your conftest and insert in the top of the file :      pytest_plugins = 'pytest_session_to_file'  Then you can launch your test with the new option --session_to_file= like this :      py.test --session_to_file=FILENAME Or :     py.test -p pytest_session_to_file --session_to_file=FILENAME   Inspire by _pytest.pastebin Ref: https://github.com/pytest-dev/pytest/blob/master/_pytest/pastebin.py  Version : 0.1 Date : 30 sept. 2015 11:25 Copyright (C) 2015 Richard Vézina <ml.richard.vezinar @ gmail.com> Licence : Public Domain """  import pytest import sys import tempfile   def pytest_addoption(parser):     group = parser.getgroup("terminal reporting")     group._addoption('--session_to_file', action='store', metavar='path', default='pytest_session.txt',                      help="Save to file the pytest session information")   @pytest.hookimpl(trylast=True) def pytest_configure(config):     tr = config.pluginmanager.getplugin('terminalreporter')     # if no terminal reporter plugin is present, nothing we can do here;     # this can happen when this function executes in a slave node     # when using pytest-xdist, for example     if tr is not None:         config._pytestsessionfile = tempfile.TemporaryFile('w+')         oldwrite = tr._tw.write          def tee_write(s, **kwargs):             oldwrite(s, **kwargs)             config._pytestsessionfile.write(str(s))         tr._tw.write = tee_write   def pytest_unconfigure(config):     if hasattr(config, '_pytestsessionfile'):         # get terminal contents and delete file         config._pytestsessionfile.seek(0)         sessionlog = config._pytestsessionfile.read()         config._pytestsessionfile.close()         del config._pytestsessionfile         # undo our patching in the terminal reporter         tr = config.pluginmanager.getplugin('terminalreporter')         del tr._tw.__dict__['write']         # write summary           create_new_file(config=config, contents=sessionlog)   def create_new_file(config, contents):     """     Creates a new file with pytest session contents.     :contents: paste contents     :returns: url to the pasted contents     """     # import _pytest.config     # path = _pytest.config.option.session_to_file     # path = 'pytest_session.txt'     path = config.option.session_to_file     with open(path, 'w') as f:         f.writelines(contents)   def pytest_terminal_summary(terminalreporter):     import _pytest.config     tr = terminalreporter     if 'failed' in tr.stats:         for rep in terminalreporter.stats.get('failed'):             try:                 msg = rep.longrepr.reprtraceback.reprentries[-1].reprfileloc             except AttributeError:                 msg = tr._getfailureheadline(rep)             tw = _pytest.config.create_terminal_writer(terminalreporter.config, stringio=True)             rep.toterminal(tw)             s = tw.stringio.getvalue()             assert len(s)             create_new_file(config=_pytest.config, contents=s)