Test more of gentest

[graue]

Using gentest to test itself seems dodgy, so I'm testing it with Mocha right now with explicit calls to gentest.sample and assertions about the generated values. I think this is fine for what it is, but much more should be tested, including a few higher-order generators that have been left out:

• test types.fmap
• test types.bind
• test types.suchThat
• test shrinking of each type
• test Property
• test Runner
• add something to measure test coverage

Also, it might be neat to test gentest by writing properties known to be true about the JavaScript standard library, and properties known to be false for specific inputs (making sure it finds those inputs).

[dan-vidoni]

I'd like to help with the mocha tests but it's the first os contribution for me so I'll need some guidance if possible :)

[graue]

Hi Dan! While I appreciate the desire to help, I don't maintain this package anymore. You might have better luck contributing to a mature project. Some have contribution guidelines and a list of good first issues, like React.

[hath995]

I would recommend taking a look at another js/ts property based testing library fast-check as it is under active development and not written in haskell in js style or clojurescript.

[dan-vidoni]

cool, thank you 👍