Add more tests using the CLI as input

[fraxken]

Take inspiration from NodeSecure/cli and add tests directly at the CLI level. This approach allows us to test everything from A to Z, making it easier to refactor and spot any regressions.

Example in CLI:

• https://github.com/NodeSecure/cli/blob/master/test/commands/summary.test.js
• https://github.com/NodeSecure/cli/blob/master/test/helpers/cliCommandRunner.js

Later we could imagine adding more UT (depending on what we need).