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RedHat 9 (Linux i386) - man page for py.test (debian section 1)

PY.TEST(1)							      pytest								PY.TEST(1)

NAME
pytest - pytest usage CALLING PY.TEST THROUGH PYTHON -M PY.TEST New in version 2.0. If you use Python-2.5 or later you can invoke testing through the Python interpreter from the command line: python -m pytest [...] This is equivalent to invoking the command line script py.test [...] directly. GETTING HELP ON VERSION, OPTION NAMES, ENVIRONMENT VARIABLES py.test --version # shows where pytest was imported from py.test --funcargs # show available builtin function arguments py.test -h | --help # show help on command line and config file options STOPPING AFTER THE FIRST (OR N) FAILURES To stop the testing process after the first (N) failures: py.test -x # stop after first failure py.test --maxfail=2 # stop after two failures
SPECIFYING TESTS
/ SELECTING TESTS Several test run options: py.test test_mod.py # run tests in module py.test somepath # run all tests below path py.test -k string # only run tests whose names contain a string Import 'pkg' and use its filesystem location to find and run tests: py.test --pyargs pkg # run all tests found below directory of pypkg
MODIFYING PYTHON TRACEBACK PRINTING
Examples for modifying traceback printing: py.test --showlocals # show local variables in tracebacks py.test -l # show local variables (shortcut) py.test --tb=long # the default informative traceback formatting py.test --tb=native # the Python standard library formatting py.test --tb=short # a shorter traceback format py.test --tb=line # only one line per failure DROPPING TO PDB (PYTHON DEBUGGER) ON FAILURES Python comes with a builtin Python debugger called PDB. py.test allows one to drop into the PDB prompt via a command line option: py.test --pdb This will invoke the Python debugger on every failure. Often you might only want to do this for the first failing test to understand a certain failure situation: py.test -x --pdb # drop to PDB on first failure, then end test session py.test --pdb --maxfail=3 # drop to PDB for the first three failures
SETTING A BREAKPOINT
/ AKA SET_TRACE() If you want to set a breakpoint and enter the pdb.set_trace() you can use a helper: import pytest def test_function(): ... pytest.set_trace() # invoke PDB debugger and tracing In previous versions you could only enter PDB tracing if you disabled capturing on the command line via py.test -s.
PROFILING TEST EXECUTION DURATION
To get a list of the slowest 10 test durations: py.test --durations=10
CREATING JUNITXML FORMAT FILES
To create result files which can be read by Hudson or other Continuous integration servers, use this invocation: py.test --junitxml=path to create an XML file at path.
CREATING RESULTLOG FORMAT FILES
To create plain-text machine-readable result files you can issue: py.test --resultlog=path and look at the content at the path location. Such files are used e.g. by the PyPy-test web page to show test results over several revi- sions.
SENDING TEST REPORT TO POCOO PASTEBIN SERVICE
Creating a URL for each test failure: py.test --pastebin=failed This will submit test run information to a remote Paste service and provide a URL for each failure. You may select tests as usual or add for example -x if you only want to send one particular failure. Creating a URL for a whole test session log: py.test --pastebin=all Currently only pasting to the http://paste.pocoo.org service is implemented. CALLING PY.TEST FROM PYTHON CODE New in version 2.0. You can invoke py.test from Python code directly: pytest.main() this acts as if you would call "py.test" from the command line. It will not raise SystemExit but return the exitcode instead. You can pass in options and arguments: pytest.main(['x', 'mytestdir']) or pass in a string: pytest.main("-x mytestdir") You can specify additional plugins to pytest.main: # content of myinvoke.py import pytest class MyPlugin: def pytest_addoption(self, parser): raise pytest.UsageError("hi from our plugin") pytest.main(plugins=[MyPlugin()]) Running it will exit quickly: $ python myinvoke.py ERROR: hi from our plugin
AUTHOR
holger krekel at merlinux eu
COPYRIGHT
2011, holger krekel et alii 2.2 June 24, 2012 PY.TEST(1)

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