Stubbing callbacks

What if you could do this:

var fetch = td.function()

td.when(fetch('/some/path', td.callback(null, 'some data'))).thenReturn(undefined)

myFunction(fetch)

The td.callback API would just immediately invoke whatever function it captures at call-time with the provided arguments.

All so that you could synchronously specify this behavior in your source:

myFunction(fetch) {
  fetch('/some/path', function(er, data){
    console.log('my data is', data)
  }
}

[searls]

This is already already supported, but if you want to control the callback function then you should configure it separately. Trying to do both in one shot would be too confusing, and any additional parameters to the td.callback matcher would be passed to the callback function, since all its args are forwarded.

Would this work?

const cb = td.when(td.func(), {delay: 500}).thenCallback(null, 'some data')
td.when(someFunc('arg1', cb)).thenResolve('whatever')

[mbaranovski]

That’s what I was looking for, thanks!