receives method should be defined as a singleton method on the singleton class

[catmando]

The receives method can be used as a class method or an instance method, but not as singleton method on the class:

class SomeComponent < HyperComponent
  after_mount do
    receives(SomeOperation) { ...self is an instance in here... } 
  end
  receives(SomeOperation) { ... self is the class in here ... }  
  class << self 
    def some_class_method
    end 
    receives(SomeOperation) { ... doesn't work! ... }
  end
end

The third case should just set up the receiver at the class level so that things read better.

Otherwise, if you are defining a bunch of class methods, and need to have a receiver at the class level, you
have to step outside the singleton class, to set the receiver up.