TEST: Add tests for game_theory/lemke_howson.py

[mmcky]

Coverage

game_theory/lemke_howson.py            152    122    20%

This has a similar issue to #300. Coverage is driven by internal private functions. As long as all internal functions are testing through lemke_howson() calls we should probably add # pragma: no cover to internal functions to fix the coverage statistics.

[mmcky]

@oyamad do you agree with adding the no cover call on internal functions here?

https://coverage.readthedocs.io/en/coverage-4.3.4/excluding.html

[oyamad]

@mmcky Thanks for opening these issues on testing.

The decrease in the coverage value is in fact not because of the privateness, but because jitted functions with nopython=True are not "covered"; see #144 (comment).

But yes, fine with me to exclude private functions that are jitted with nopython=True.

[mmcky]

Thanks @oyamad. I have pushed a branch that updates .coveragerc to skip @jit functions in the coverage statistics. This regex approach moves lemke_howson.py to 88+%

Perhaps I should fine tune from @jit to @jit(.*nopython=True)