Update unit tests

[countvajhula]

Summary of Changes

Bring unit tests up to date with new behavior involving debts and advances, and the new module layout.

Remaining, write tests for:

• advances [@apromessi ]
• debt [@jairtrejo ]
• equity [@countvajhula ]
• complete integration test stubs

Public Domain Dedication

• In contributing, I relinquish any copyright claims on my contribution and freely release it into the public domain in the simple hope that it will provide value.

(Why: The freely released, copyright-free work in this repository represents an investment in a better way of doing things called attribution-based economics. Attribution-based economics is based on the simple idea that we gain more by giving more, not by holding on to things that, truly, we could only create because we, in our turn, received from others. As it turns out, an economic system based on attribution -- where those who give more are more empowered -- is significantly more efficient than capitalism while also being stable and fair (unlike capitalism, on both counts), giving it transformative power to elevate the human condition and address the problems that face us today along with a host of others that have been intractable since the beginning. You can help make this a reality by releasing your work in the same way -- freely into the public domain in the simple hope of providing value. Learn more about attribution-based economics at drym.org, tell your friends, do your part.)

[coveralls]

Pull Request Test Coverage Report for Build 12153765384

Details

• 8 of 8 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 96.987%

---

Totals
Change from base Build 12043819116:	0.0%
Covered Lines:	460
Relevant Lines:	471

---

💛 - Coveralls