import unittest


try:
    import pytest

    from constance import config
    from constance.test.pytest import override_config


    class TestPytestOverrideConfigFunctionDecorator:
        """Test that the override_config decorator works correctly for Pytest classes.

        Test usage of override_config on test method and as context manager.
        """

        def test_default_value_is_true(self):
            """Assert that the default value of config.BOOL_VALUE is True."""
            assert config.BOOL_VALUE

        @pytest.mark.override_config(BOOL_VALUE=False)
        def test_override_config_on_method_changes_config_value(self):
            """Assert that the pytest mark decorator changes config.BOOL_VALUE."""
            assert not config.BOOL_VALUE

        def test_override_config_as_context_manager_changes_config_value(self):
            """Assert that the context manager changes config.BOOL_VALUE."""
            with override_config(BOOL_VALUE=False):
                assert not config.BOOL_VALUE

            assert config.BOOL_VALUE

        @override_config(BOOL_VALUE=False)
        def test_method_decorator(self):
            """Ensure `override_config` can be used as test method decorator."""
            assert not config.BOOL_VALUE


    @pytest.mark.override_config(BOOL_VALUE=False)
    class TestPytestOverrideConfigDecorator:
        """Test that the override_config decorator works on classes."""

        def test_override_config_on_class_changes_config_value(self):
            """Asser that the class decorator changes config.BOOL_VALUE."""
            assert not config.BOOL_VALUE

        @pytest.mark.override_config(BOOL_VALUE='True')
        def test_override_config_on_overrided_value(self):
            """Ensure that method mark decorator changes already overrided value for class."""
            assert config.BOOL_VALUE == 'True'


    def test_fixture_override_config(override_config):
        """
        Ensure `override_config` fixture is available globally
        and can be used in test functions.
        """
        with override_config(BOOL_VALUE=False):
            assert not config.BOOL_VALUE

    @override_config(BOOL_VALUE=False)
    def test_func_decorator():
        """Ensure `override_config` can be used as test function decorator."""
        assert not config.BOOL_VALUE

except ImportError:
    pass


class PytestTests(unittest.TestCase):
    def setUp(self):
        self.skipTest('Skip all pytest tests when using unittest')

    def test_do_not_skip_silently(self):
        """
        If no at least one test present, unittest silently skips module.
        """
        pass
