test_events.py

"""Test the EventManager class."""

import pytest

from sphinx.errors import ExtensionError
from sphinx.events import EventManager


def test_event_priority():
    result = []
    events = EventManager(object())  # pass an dummy object as an app
    events.connect('builder-inited', lambda app: result.append(1), priority = 500)
    events.connect('builder-inited', lambda app: result.append(2), priority = 500)
    events.connect('builder-inited', lambda app: result.append(3), priority = 200)  # eariler
    events.connect('builder-inited', lambda app: result.append(4), priority = 700)  # later
    events.connect('builder-inited', lambda app: result.append(5), priority = 500)

    events.emit('builder-inited')
    assert result == [3, 1, 2, 5, 4]


def test_event_allowed_exceptions():
    def raise_error(app):
        raise RuntimeError

    events = EventManager(object())  # pass an dummy object as an app
    events.connect('builder-inited', raise_error, priority=500)

    # all errors are converted to ExtensionError
    with pytest.raises(ExtensionError):
        events.emit('builder-inited')

    # Allow RuntimeError (pass-through)
    with pytest.raises(RuntimeError):
        events.emit('builder-inited', allowed_exceptions=(RuntimeError,))