test cover cli demo

[grypez]

What is the Problem Being Solved?

The cli package is not currently tested. It would be nice to write some tests, and the demo seems like a good place to start.

Description of the Design

• [x] Activate ava test coverage in cli package
• [x] Create an ava entry point which tests each section in isolation after running endo purge -f.

For each runnable section of the cli demo, produce a bash script executing that functionality and a log of the expected output of the script, then assert equality of the expected and observed output of the script using diff (for an example see the description of this issue).

• [x] A counter example
• [x] Doubler Agent
• [x] Sending Messages
• [x] Names in transit...
• [x] Mailboxes are symmetric
• [ ] Familiar Chat (note UI interaction)
• [x] Running a confined script

Out of Scope

• Programmatically ensuring that the documented functionality aligns with the tested functionality

[kriskowal]

You may have more luck ensuring portability if the tests are framed as Node.js shelling out to the CLI. Execa is popular at Agoric. https://www.npmjs.com/package/execa