Python test fixture to run a single test?

Question

I\'m looking for something like ruby rspec\'s focus metadata or elixir\'s mix tags to run a single python test.

Ruby RSpec Example:

#         


        

Answer 1

Say hello to pytest mark. You can create a focus tag, assign to any test case or method and then run tests with pytest -v -m focus command. For example:

import unittest
import pytest

class TestOne(unittest.TestCase):
    def test_method1(self):
        # I won't be executed with focus mark
        self.assertEqual(1, 1)

    @pytest.mark.focus
    def test_method2(self):  
        # I will be executed with focus mark          
        self.assertEqual(1, 1)

will run test_method2. To run all methods within some TestCase, you simply mark a class:

import unittest
import pytest

@pytest.mark.focus
class TestOne(unittest.TestCase):
    ...

You will need to register your custom marks in pytest.ini like

[pytest]
markers =
    focus: what is being developed right now

To see the available marks, run pytest --markers.