Repository doesn't have tests

[JordanMartinez]

Is your change request related to a problem? Please describe.
As described in the tests section of the Library Guidelines, Contributors libraries ar expected to have tests exercised in CI on pull requests and the main branch.

This library currently doesn't have tests. It's current test code is more like example code. While it does prove that the code works, it's not using a test suite to do that.

Describe the solution you'd like
The test should be updated to use a test suite. Such a suite could include quickcheck-laws to verify that type class instances are lawful

Additional context
See the Governance repository for more information about requirements in the Contributors organization.

[thomashoneyman]

I wonder whether a test could be added to help #3, as well, in catching things like stack overflows.