Add spec for NameError#receiver

[yuki24]

No description provided.

[eregon]

Could this spec be written using an anonymous class (Class.new)?

[yuki24]

In this particular case, a class variable call needs to be made in a subclass' namespace. Anonymous classes don't create namespace, therefore a constant needs to explicitly be defined. It doesn't have to be defined in this file and could be moved to the fixtures dir, though.

[eregon]

I see, thanks for the explanation. @@cvar are like constants, I tend to forget 😄
Could you move it to the fixtures? This would also mean the cleanup code (remove_const) is not necessary.

[eregon]

Nice one as well!
Please review my comments.

[yuki24]

updated the commits. I've also changed the operator to equal since NameError#receiver should return the object that the method is called on.

[eregon]

Thanks, please move the named class to a fixture file and let's merge this!

[eregon]

I moved the class to the fixtures file, thank you for your contribution and the good specs!

[yuki24]

@eregon Thanks for taking care of the class!