add an option to render functions as their body

[scarf005]

for example:

const inspectFunction = fn => fn.toString()

inspectFunction(() => 3) 
// () => 3

inspectFunction(function(a, b, c) { return a + b + c })
// "function(a, b, c) { return a + b + c }" 

[keithamus]

Thanks for the issue @scarf005. I think this is a reasonable suggestion. Perhaps we could make this the default, provided that the functions body fits within the remaining truncate length; so something like:

export default function inspectFunction(func, options) {
  const source = func.toString()
  if (source.length < options.truncate - 12) {
    return options.stylize(`[Function: ${source}]`, 'special')
  }
  const name = getFunctionName(func)
  if (!name) {
    return options.stylize('[Function]', 'special')
  }
  return options.stylize(`[Function ${truncate(name, options.truncate - 11)}]`, 'special')
}

[scarf005]

alright, could i create a PR for it?

[keithamus]

Please do! That would be awesome! A robust set of tests against this would be excellent too!

[scarf005]

alright. also out of context, will chai (and its related packages) consider migrating to typescript?

[keithamus]

It's indeed on the radar, alongside making it a first class citizen of Deno. Any help in either direction is very welcome!