"Go to Definition" not working for test functions inside classes

[summerduck]

Environment data

• Pylance version: v2024.8.101 (pre-release)
• ProductName: macOS
• ProductVersion: 14.2.1
• BuildVersion: 23C71
• Python version (& distribution if applicable, e.g. Anaconda): Python 3.12.5

Code Snippet

# File: pages/home_page.py
class HomePage:
    """
    Module description
    """
    def __init__(self) -> None:
        pass
    
    def params_navigation(self):
        """
        Method description
        """
        print("params_navigation")


# File: tests/test_file_tests.py
class TestClassTest:
    def test_without_method_definition(
        self,
        fixture_from_main,
        fixture_from_tests,
    ):
        fixture_from_main.params_navigation()
        fixture_from_tests.params_navigation()


def test_with_method_definition(
        fixture_from_main,      
        fixture_from_tests
    ):
        fixture_from_main.params_navigation()
        fixture_from_tests.params_navigation()

# File: tests/conftest.py
import pytest
from pages.home_page import HomePage


@pytest.fixture
def fixture_from_tests() -> HomePage:
    return HomePage()

# File: tests/conftest.py
import pytest
from pages.home_page import HomePage


@pytest.fixture
def fixture_from_main() -> HomePage:
    return HomePage()

# File: test_file_main.py
class TestClassTest:
    def test_without_method_definition(
        self,
        fixture_from_main,
    ):
        fixture_from_main.params_navigation()


def test_with_method_definition(fixture_from_main):
    fixture_from_main.params_navigation()

Note that the HomePage class is initialized by a fixture in the conftest.py file and passed to the test functions.

Repro Steps

1. Navigate to the test_file_tests.py or test_file_main.py file.
2. Attempt to use "Go to Definition" on the params_navigation method call inside and outside the test methods.
   

Expected behavior

The "Go to Definition" should navigate to the params_navigation method definition in home_page.py.

Actual behavior

No navigation occurs.

[rchiodo]

Thanks for the issue.

Do you have this enabled?

Because this works for me:

[rchiodo]

Sorry misunderstood. It's not working in the test class, but it is in the test method.

[heejaechang]

Repro workspace for investigation:
https://github.com/heejaechang/pylance-repro/tree/main/pylance-issues/6292

[heejaechang]

@summerduck Thanks for the report and the clear repro!

This is the same underlying issue as #7351 — pytest fixture types weren't being inferred for test functions/methods inside Test* classes, which is why Go to Definition (and hover/completions) on a fixture's members worked for module-level test functions but not for methods inside a Test* class.

That has been fixed (via the work for #7351), so I'm closing this as a duplicate of #7351. Please update to the latest pre-release version of the Pylance extension and you should see Go to Definition working on fixture members inside test classes. If you still run into it, let us know your Pylance version and we'll be happy to reopen.

Thanks again!