Add a test case for market_history plugin#1661

Draft

abitmore wants to merge 6 commits intodevelopfrom jmj_1627

+191

Commits on Mar 5, 2019

beginning of unit test
jmjatlanta
committed

Commits on Mar 8, 2019

more information in test
jmjatlanta
committed

Commits on Mar 11, 2019

Test working
John Jones
committed
Make output less verbose
John Jones
committed

Commits on Mar 25, 2019