GitHub - jasonkeene/py.spec

py.spec

RSpec has really awesome BDD syntax for managing context. Wouldn't it be nice if we had something like it for Python? Perhaps something that leveraged the awesomeness of py.test?

Add these lines to your pytest.ini:

[pytest]
python_classes=Test Describe Context
python_functions=test it

Then write your tests like this:

class DescribeWidget:
    @pytest.fixture
    def widget(self):
        return Widget(3, 4)

    def it_adds(self, widget):
        assert widget.add() == 7

    class ContextWithExplosives:
        @pytest.fixture
        def widget(self, widget):
            widget.explode = True
            return widget

        def it_explodes(self, widget):
            with pytest.raises(Exception):
                widget.add()

        class ContextWithExplodingDinosaurs:
            @pytest.fixture
            def widget(self, widget):
                widget.jurassic = True
                return widget

            def it_rawrs(self, widget):
                with pytest.raises(Exception) as e:
                    widget.add()
                assert e.value.message == "RAWR!" * 1000

Thanks to @theY4Kman for showing me how nested fixtures work!