DemoMockAsyncioCommunicate.py

    @asynctest.mock.patch("asyncio.create_subprocess_shell")
    @pytest.mark.asyncio
    async def test_list_files(self, mock_subproc_popen):
        mock_subproc_popen.return_value = AsyncioCreateSubprocessShellCommunicateMock(
            (
                b"""
a.txt
b.txt
""",
                b"",
            )
        ).mock
        assert...