@classmethoddef setUpClass(cls): ... - перед запуском всех тестов@classmethoddef tearDownClass(cls): ... - после отработки всех тестовТестирует функции с именем
test_*, методы test_* в классе Test* или в классе наследнике unittest.TestCase# content of test_sample.pydef inc(x): return x + 1def test_answer(): assert inc(3) == 5======= test session starts ========
platform linux — Python 3.5.2, pytest-3.0.7, py-1.4.32, pluggy-0.4.0
rootdir: $REGENDOC_TMPDIR, inifile:
collected 1 items
test_sample.py F
======= FAILURES ========
_______ test_answer ________
def test_answer():
> assert inc(3) == 5
E assert 4 == 5
E + where 4 = inc(3)
test_sample.py:5: AssertionError
======= 1 failed in 0.12 seconds ========
platform linux — Python 3.5.2, pytest-3.0.7, py-1.4.32, pluggy-0.4.0
rootdir: $REGENDOC_TMPDIR, inifile:
collected 1 items
test_sample.py F
======= FAILURES ========
_______ test_answer ________
def test_answer():
> assert inc(3) == 5
E assert 4 == 5
E + where 4 = inc(3)
test_sample.py:5: AssertionError
======= 1 failed in 0.12 seconds ========
Параметризированный вызов теста:
import pytest@pytest.mark.parametrize("test_input,expected", [ ("3+5", 8), ("2+4", 6), ("6*9", 42),])def test_eval(test_input, expected): assert eval(test_input) == expectedКонтексты тестирования, монкипатч (замена стандартного ввода/вывода на время теста)
import ioimport sysdef test_smth(capsys, monkeypath): handle = io.StringIO('!') monkeypath.setattr(sys, 'stdin', handle) start_smth() output, _err = capsys.readouterr() assert output == '!'Плагины для
py.test:pytest-cov: coverage reporting, compatible with distributed testingpytest-django: write tests for django apps, using pytest integrationpytest-timeout: to timeout tests based on function marks or global definitionspytest-pep8: a —pep8 option to enable PEP8 compliance checkingHypothesis - API для формулирования и проверки свойств. Production ready on Python.
Hypothesis is a modern implementation of property based testing, designed from the ground up for mainstream languages.