Test coverage

[shadowspawn]

Pull Request

Add edge case tests to increase test coverage to everything except process.mainModule and _executeSubCommand.

Related: process.mainModule is deprecated!

[shadowspawn]

If we remove these two areas from the coverage:

• process.mainModule: deprecated, will add tests when rework
• _executeSubCommand: doing some tests using spawn which not included in coverage

----------|---------|----------|---------|---------|-------------------
File      | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
----------|---------|----------|---------|---------|-------------------
All files |     100 |     99.8 |     100 |     100 |                   
 index.js |     100 |     99.8 |     100 |     100 | 851               
----------|---------|----------|---------|---------|-------------------

I was thinking of removing these areas from the coverage, but reverted that commit. Will investigate what the executable tests do cover and whether can do them in a way which is counted. And try improving the coverage "honestly". 😊

[abetomo]

Adding tests is great.