Play nicely with message forwarding

[gf3]

• Indicate whether a value can properly respond to a message

[tomstuart]

Sorry, I had notifications turned off, so I only just noticed this.

This overlaps with #2, but your implementation is different. Which one is right?

[tomstuart]

I would rather see expect(optional).to respond_to :challenge here, assuming that works.

[gf3]

oh dang, i didn't even know there was a matcher for that. will update

[gf3]

@tomstuart updated the test. i don't think the within usage is necessary if we want this to play well with other ruby objects/libraries. of course it's up to you

[tomstuart]

@gf3 Thanks. What would the corresponding tests look like for Many and Eventually?

[gf3]

@tomstuart ahh, i suppose we'd have to apply the respond_to? check to values and block respectively. alternatively we could use a common name for the stored value in each class.

[tomstuart]

@gf3 Well, that’s what within is for. :)

[gf3]

@tomstuart oh my mistake—i thought it also re-wrapped values.

[gf3]

@tomstuart the other PR is correct then

[tomstuart]

@gf3 It does — I’m being a bit flippant. I just mean that this implementation needs to work across all monads, so it’s going to have to use within (or similar) somehow.

[tomstuart]

This change is superseded by #10, so I’m closing it.