How do we do unit testing?

[dustinvtran]

Testing each loading function requires downloading data from the url(s) and verifying the returned data objects. How do we test without having to download many files for each Travis build? Is storing every file on a Travis server feasible? (no)

[Arvinds-ds]

I did create a json file of all available datasets to perform internal testing for my PR. I am note sure how you might want to test it. I am attaching the json file which can be expanded to include true hash and other fields. Feel free to use it as needed in repo

dataset.json.zip