... guess I couldn't quite figure out how to unit test the _date_from_json as I couldn't find where the other _X_from_json functions were tested

Tests for the bigquery._helpers module are here.

Thanks for the patch, BTW!

@tseaver Ty, I did find the tests module, but as the function I added had several similar functions I wanted to test it consistently, and I guess I couldn't find the tests for the others;

Ex. I added _date_from_json and "_float_from_json" already existed hence I want to test it in the same manner, but can't see where that happens

@thejens Hmmm, I see what you mean. Those helpers are being covered indirectly through the tests for query and table. They should probably have their own coverage in test__helpers.py, though.

@thejens I landed more comprehensive tests for google.cloud.bigquery._helpers in #2272. They should serve as a model for your tests of _date_from_json.

@tseaver Thanks for putting those tests there; seems they and the one I added passed

@thejens Thanks again!