pytest_configure fixtures not showing so set global now no coverage

[msftcangoblowm]

Explain the issue

There are two pytest plugin implementations. plugin_v0 is well tested. plugin_v1 is the newer implementation which is not as mature. So a gradual transition is occurring which ends when plugin_v0 is eventually deprecated and removed.

In the interm, there are two implementations. Both working. (assume) Both with tests. Both having issues with coverage caused by changing the fixture scope from function to module using Python builtin global. Without changing the scope, the plugin is registered, but the fixtures are not found.

Is there a better, coverage friendly, way to make imported fixtures found without using global.

In pyproject.toml

[project.entry-points.pytest11]
mypackage = "thisismypackage.plugin_wireframe"

In tests/conftest.py

pytest_plugins = [
    "pytester",
    "mypackage",
]

In tests/__init__.py exists and is an empty file

In src/thisismypackage/plugin_wireframe.py

# simplified to a module variable, but normally would be a config or cli option.
IMPLEMENTATION_VERSION_NO_DEFAULT = "1"

# module level variables have no effect
fixture_0 = None
fixture_1 = None
fixture_2 = None
fixture_3 = None
mypackage = None

def pytest_configure(config):
    """Load plugin and fixtures"""
    if IMPLEMENTATION_VERSION_NO_DEFAULT == "1":
        from thisismypackage.plugin_v1 import _configure, fixture_0, fixture_1, mypackage
        global fixture_0
        global fixture_1
        global mypackage
        _configure()
    else:
        from thisismypackage.plugin_v0 import _configure, fixture_2, fixture_3, mypackage
        global fixture_2
        global fixture_3
        global mypackage
        _configure()

Assume there are tests covering fixture[0-3]
The plugin is registered. Without the global lines, the fixtures are not found

global mypackage is the main fixture, pytester calls the main pytest fixture which calls other fixtures.

This works beautifully, but coverage isn't spotting the fixtures.

Would like to ask the community whether or not there is a better way to do this without global

Have searched

• pytest issues (both closed and open)
• coverage issues (both closed and open)
• web search

The above issue is tailored towards mature plugin authors, not basic plugin case.

[msftcangoblowm]

With a basic pytest plugin, all the code is in one module without importing fixtures from other modules.

In which case, coverage has no problem finding the fixtures.