Function test_multiprocessing_run

IPython/core/tests/test_run.py:562–588

Set we can run mutiprocesgin without messing up up main namespace Note that import `nose.tools as nt` mdify the value s sys.module['__mp_main__'] so wee need to temporarily set it to None to test the issue.

()

def test_multiprocessing_run():
    """Set we can run mutiprocesgin without messing up up main namespace

    Note that import `nose.tools as nt` mdify the value s
    sys.module['__mp_main__'] so wee need to temporarily set it to None to test
    the issue.
    """
    with TemporaryDirectory() as td:
        mpm = sys.modules.get('__mp_main__')
        assert mpm is not None
        sys.modules['__mp_main__'] = None
        try:
            path = pjoin(td, 'test.py')
            with open(path, 'w') as f:
                f.write("import multiprocessing\nprint('hoy')")
            with capture_output() as io:
                _ip.run_line_magic('run', path)
                _ip.run_cell("i_m_undefined")
            out = io.stdout
            nt.assert_in("hoy", out)
            nt.assert_not_in("AttributeError", out)
            nt.assert_in("NameError", out)
            nt.assert_equal(out.count("---->"), 1)
        except:
            raise
        finally:
            sys.modules['__mp_main__'] = mpm

@dec.knownfailureif(sys.platform == 'win32', "writes to io.stdout aren't captured on Windows")
def test_script_tb():