[Pytest-commit] Issue #689: Allow for pytester to not redirect stdio (ipdb.set_trace() etc) (pytest-dev/pytest)

[Daniel Hahler]

New issue 689: Allow for pytester to not redirect stdio (ipdb.set_trace() etc)
https://bitbucket.org/pytest-dev/pytest/issue/689/allow-for-pytester-to-not-redirect-stdio

Daniel Hahler:

I would like to use `ipbd.set_trace()` (interactively) from a test, like this:

```
#!python
def test_runpytest_ipdb(self, testdir):
    testdir.makepyfile("""
    def test_foo():
    import ipdb; ipdb.set_trace()
    """)
    result = testdir.runpytest('-s')
```

When running this test (using `py.test -s`), the test will "hang"; nothing
gets displayed.

You can interact with the debugger, and quit it using `Ctrl-d`.