Function test_error_on_async_function

testing/acceptance_test.py:1259–1284

(pytester: Pytester)

def test_error_on_async_function(pytester: Pytester) -> None:
    # In the below we .close() the coroutine only to avoid
    # "RuntimeWarning: coroutine 'test_2' was never awaited"
    # which messes with other tests.
    pytester.makepyfile(
        test_async="""
        async def test_1():
            pass
        async def test_2():
            pass
        def test_3():
            coro = test_2()
            coro.close()
            return coro
    """
    )
    result = pytester.runpytest()
    result.stdout.fnmatch_lines(
        [
            "*async def functions are not natively supported*",
            "*test_async.py::test_1*",
            "*test_async.py::test_2*",
            "*test_async.py::test_3*",
        ]
    )
    result.assert_outcomes(failed=3)


def test_error_on_async_gen_function(pytester: Pytester) -> None: