I want to start writing unit tests for my Python code, and the py.test framework sounds like a better bet than Python’s bundled unittest. So I added a “tests” directory to my project, and added test_sample.py to it. Now I want to configure PyCharm to run all the tests in my “tests” directory. PyCharm allegedly … Read more
I am using selenium for end to end testing and I can’t get how to use setup_class and teardown_class methods. I need to set up browser in setup_class method, then perform a bunch of tests defined as class methods and finally quit browser in teardown_class method. But logically it seems like a bad solution, because … Read more
I am using py.test to test some DLL code wrapped in a python class MyTester. For validating purpose I need to log some test data during the tests and do more processing afterwards. As I have many test_… files I want to reuse the tester object creation (instance of MyTester) for most of my tests. … Read more
I am working on a package in Python. I use virtualenv. I set the path to the root of the module in a .pth path in my virtualenv, so that I can import modules of the package while developing the code and do testing (Question 1: is it a good way to do?). This works … Read more
How to do assert almost equal with py.test for floats without resorting to something like: assert x – 0.00001 <= y <= x + 0.00001 More specifically it will be useful to know a neat solution for quickly compare pairs of float, without unpacking them: assert (1.32, 2.4) == i_return_tuple_of_two_floats() 8 Answers 8
I used easy_install to install pytest on a mac and started writing tests for a project with a file structure likes so: repo/ |–app.py |–settings.py |–models.py |–tests/ |–test_app.py run py.test while in the repo directory, everything behaves as you would expect but when I try that same thing on either linux or windows (both have … Read more
I’m trying to use TDD (test-driven development) with pytest. pytest will not print to the console when I use print. I am using pytest my_tests.py to run it. The documentation seems to say that it should work by default: http://pytest.org/latest/capture.html But: import myapplication as tum class TestBlogger: @classmethod def setup_class(self): self.user = “alice” self.b = … Read more
I recently discovered pytest. It seems great. However, I feel the documentation could be better. I’m trying to understand what conftest.py files are meant to be used for. In my (currently small) test suite I have one conftest.py file at the project root. I use it to define the fixtures that I inject into my … Read more
Is there a way to select pytest tests to run from a file? For example, a file foo.txt containing a list of tests to be executed: tests_directory/foo.py::test_001 tests_directory/bar.py::test_some_other_test Or, is there a way to select multiple tests, having no common pattern in test name, from different directories with pytest? pytest -k <pattern> allows a single … Read more
Code: # coding=utf-8 import pytest def whatever(): return 9/0 def test_whatever(): try: whatever() except ZeroDivisionError as exc: pytest.fail(exc, pytrace=True) Output: ================================ test session starts ================================= platform linux2 — Python 2.7.3 — py-1.4.20 — pytest-2.5.2 plugins: django, cov collected 1 items pytest_test.py F ====================================== FAILURES ====================================== ___________________________________ test_whatever ____________________________________ def test_whatever(): try: whatever() except ZeroDivisionError as … Read more
