Test failure with disabled byte-compilation

[pytestbot]

Originally reported by: Arfrever Frehtes Taifersar Arahesis (BitBucket: arfrever, GitHub: arfrever)

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1 test failure occurs when byte-compilation is disabled (e.g. using PYTHONDONTWRITEBYTECODE environmental variable). This problem was introduced in pytest 2.3.0.

Results for pytest hg tip:

$ PYTHONDONTWRITEBYTECODE="1" python2.7 pytest.py
============================= test session starts ==============================
platform linux2 -- Python 2.7.4 -- pytest-2.3.2.dev2
collected 839 items

doc/en/example/assertion/test_failures.py .
doc/en/example/assertion/test_setup_flow_example.py ..
doc/en/example/assertion/global_testmodule_config/test_hello.py .
doc/en/example/costlysetup/sub1/test_quick.py .
doc/en/example/costlysetup/sub2/test_two.py ..
doc/en/example/py2py3/test_py2.py .
doc/en/example/py2py3/test_py3.py .
testing/acceptance_test.py ......................................x.......
testing/test_assertinterpret.py ..........................s
testing/test_assertion.py ........................
testing/test_assertrewrite.py ...................F..
testing/test_capture.py ..............x....................
testing/test_collection.py ...........x...................
testing/test_config.py ........x................
testing/test_conftest.py ..............................
testing/test_core.py ...................................................
testing/test_doctest.py .........
testing/test_genscript.py .....sss
testing/test_helpconfig.py ........
testing/test_junitxml.py ......................
testing/test_mark.py ...................................
testing/test_monkeypatch.py ......................
testing/test_nose.py ..........
testing/test_parseopt.py ............
testing/test_pastebin.py ...
testing/test_pdb.py ............
testing/test_pytester.py x.......
testing/test_python.py ...................................................................................................................................x........................................
testing/test_recwarn.py ........
testing/test_resultlog.py .........
testing/test_runner.py .................sssssss..ssss.......x........
testing/test_runner_xunit.py ..........
testing/test_session.py ...............
testing/test_skipping.py ...................................
testing/test_terminal.py .................................s............................
testing/test_tmpdir.py ......
testing/test_unittest.py ...........................

=================================== FAILURES ===================================
_____________________ TestRewriteOnImport.test_pyc_vs_pyo ______________________

self = <test_assertrewrite.TestRewriteOnImport instance at 0x2cb5c20>
testdir = <TmpTestdir local('/tmp/pytest-0/testdir/test_pyc_vs_pyo0/test_pyc_vs_pyo')>
monkeypatch = <_pytest.monkeypatch.monkeypatch instance at 0x2cb5758>

    @pytest.mark.skipif('"__pypy__" in sys.modules')
    def test_pyc_vs_pyo(self, testdir, monkeypatch):
        testdir.makepyfile("""
    import pytest
    def test_optimized():
        "hello"
        assert test_optimized.__doc__ is None""")
        p = py.path.local.make_numbered_dir(prefix="runpytest-", keep=None,
                                            rootdir=testdir.tmpdir)
        tmp = "--basetemp=%s" % p
        monkeypatch.setenv("PYTHONOPTIMIZE", "2")
        assert testdir.runpybin("py.test", tmp).ret == 0
        tagged = "test_pyc_vs_pyo." + PYTEST_TAG
>       assert tagged + ".pyo" in os.listdir("__pycache__")
E       OSError: [Errno 2] No such file or directory: '__pycache__'

/tmp/pytest/testing/test_assertrewrite.py:367: OSError
------------------------------- Captured stdout --------------------------------
running ['/usr/bin/python2.7', '/tmp/pytest/pytest.py', '--basetemp=/tmp/pytest-0/testdir/test_pyc_vs_pyo0/test_pyc_vs_pyo/runpytest-0'] curdir= /tmp/pytest-0/testdir/test_pyc_vs_pyo0/test_pyc_vs_pyo
============================= test session starts ==============================
platform linux2 -- Python 2.7.4 -- pytest-2.3.2.dev2
collected 1 items

test_pyc_vs_pyo.py .

=========================== 1 passed in 0.03 seconds ===========================
------------------------------- Captured stderr --------------------------------
WARNING: assertions which are not in test modules will be ignored because assert statements are not executed by the underlying Python interpreter (are you using python -O?)
=========================== short test summary info ============================
XFAIL testing/acceptance_test.py::TestInvocationVariants::()::test_noclass_discovery_if_not_testcase
  decide: feature or bug
XFAIL testing/test_capture.py::TestPerTestCapturing::()::test_capture_scope_cache
XFAIL testing/test_collection.py::TestPrunetraceback::()::test_collect_report_postprocessing
  other mechanism for adding to reporting needed
XFAIL testing/test_config.py::TestParseIni::()::test_confcutdir
  probably not needed
XFAIL testing/test_pytester.py::test_reportrecorder
  reason: internal reportrecorder tests need refactoring
XFAIL testing/test_python.py::TestAutouseDiscovery::()::test_setup_enabled_functionnode
  'enabled' feature not implemented
XFAIL testing/test_runner.py::test_runtest_in_module_ordering
SKIP [2] /tmp/pytest/_pytest/core.py:121: plugin 'xdist' is missing
SKIP [11] /tmp/pytest/testing/test_runner.py:277: could not import 'xdist.plugin'
SKIP [1] /tmp/pytest/_pytest/skipping.py:120: condition: sys.version_info >= (2,6)
SKIP [1] /tmp/pytest/testing/conftest.py:109: no suitable jython found
SKIP [1] /tmp/pytest/testing/conftest.py:109: no suitable pypy found
======== 1 failed, 815 passed, 16 skipped, 7 xfailed in 756.22 seconds =========

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• Bitbucket: https://bitbucket.org/pytest-dev/pytest/issue/206

[pytestbot]

Original comment by holger krekel (BitBucket: hpk42, GitHub: hpk42):

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fix issue206 - unset PYTHONDONTWRITEBYTECODE in assertrewrite test