import pytest


def fail_test(loop, context):  # pragma: no cover
    loop.test_failure = context


def setup_test_loop(loop):
    loop.set_exception_handler(fail_test)
    loop.test_failure = None


def check_loop_failures(loop):  # pragma: no cover
    if loop.test_failure is not None:
        pytest.fail("{message}: {exception}".format(**loop.test_failure))


@pytest.fixture
def glib_policy():
    from gbulb.glib_events import GLibEventLoopPolicy

    return GLibEventLoopPolicy()


@pytest.fixture
def gtk_policy():
    from gbulb.gtk import GtkEventLoopPolicy

    return GtkEventLoopPolicy()


@pytest.fixture(scope="function")
def glib_loop(glib_policy):
    loop = glib_policy.new_event_loop()
    setup_test_loop(loop)
    yield loop
    check_loop_failures(loop)
    loop.close()


@pytest.fixture(scope="function")
def gtk_loop(gtk_policy):
    loop = gtk_policy.new_event_loop()
    setup_test_loop(loop)
    yield loop
    check_loop_failures(loop)
    loop.close()