venv/lib/python3.12/site-packages/jupyter_lsp/tests/test_detect.py

from jupyter_lsp.specs.r_languageserver import RLanguageServer
from jupyter_lsp.specs.utils import PythonModuleSpec


def test_no_detect(manager):
    """should not enable anything by default"""
    manager.autodetect = False
    manager.initialize()
    assert not manager.language_servers
    assert not manager.sessions


def test_detect(manager):
    manager.initialize()
    assert len(manager.sessions) == len(manager.language_servers)


def test_r_package_detection():
    with_installed_server = RLanguageServer()
    assert with_installed_server.is_installed(mgr=None) is True

    class NonInstalledRServer(RLanguageServer):
        package = "languageserver-fork"

    non_installed_server = NonInstalledRServer()
    assert non_installed_server.is_installed(mgr=None) is False


def test_missing_python_module_spec():
    """Prevent failure in module detection raising error"""

    class NonInstalledPythonServer(PythonModuleSpec):
        python_module = "not_installed_python_module"
        key = "a_module"

    not_installed_server = NonInstalledPythonServer()

    assert not_installed_server.is_installed(mgr=None) is False

    # we ant the spec even when not installed
    assert "languages" in not_installed_server(mgr=None)["a_module"]