It's cool we have automated test execution, and Mocha makes the test results look nice with all those check marks. What if the management wants a graph of test failure trends over time?  Or there could be any number of reasons to report test results as data rather than a user-friendly printout on the console.

Mocha uses what's called a Reporter to report test results. A Mocha Reporter is a module that prints data in whatever format it supports. Information is on the Mocha website:  https://mochajs.org/#reporters.

You will find the current list of available reporters like so:

# mocha --reporters

    dot - dot matrix
    doc - html documentation
    spec - hierarchical spec list
    json - single json object
    progress - progress bar
    list - spec-style listing
    tap - test-anything-protocol
...

Then you use a specific reporter like so:

# mocha --reporter tap test
1..4
ok 1 Users Test List user list created users
ok 2 Users Test find user find created users
ok 3 Users Test find user fail to find non-existent users
ok 4 Users Test delete user delete nonexistent users
# tests 4
# pass 4
# fail 0

Test Anything Protocol (TAP) is a widely used test results format, increasing the possibility of finding higher level reporting tools. Obviously, the next step would be to save the results into a file somewhere, after mounting a host directory into the container.