Auto-generate fairly safe parameterized test cases.

[detrout]

Given the stature of ImportProject, it seemed to have too few test cases.

This agent will apply some minimal code quality tests to all python code.

Currently 15 tests fail and 54 pass.

I had a more complicated idea using ast to parse modules, find all the functions that had >0 arguments, and then try to call them with:

self.assertRaises(TypeError, getattr(module, funcname))

Which would increase code coverage without having to know what the function was doing, but I felt like parsing was probably too unsafe.

[sneakers-the-rat]

I think it would be great if we could maximize coverage without compromising velocity by adding an autouse=True fixture that wraps every test in contextlib.suppress(Exception) and eval'ing every line of code in independent sandboxed VMS one by one