make tests able to run interactively

[nsheff]

I had the tests so that I could run them interactively and test things.

Now I can no longer do that. Can you please replace the way I had it so that I can run them interactively?

Before:

mport pytest
import yacman
import os

# for interactive testing, run from within code/yacman

def test_yaml_load():
    conf = yacman.load_yaml("conf.yaml")
    yacmap = yacman.YacAttMap("conf.yaml")
    yacmap2 = yacman.YacAttMap(conf)

Can run this no problem

After:

 import pytest                                                                                                              

In [4]: import pytest                                                                                                              

In [5]: import yacman                                                                                                              

In [6]: import os                                                                                                                  

In [7]:         yacmap = yacman.YacAttMap(filepath=cfg_file, writable=True)                                                        
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-7-f12aa010db02> in <module>
----> 1 yacmap = yacman.YacAttMap(filepath=cfg_file, writable=True)

NameError: name 'cfg_file' is not defined

Can no longer easily get a testing environment where I can just load up a yacman for example interactive exploring.