Class: Sus::RespondTo::WithParameters

Inherits:
Object
  • Object
show all
Defined in:
lib/sus/respond_to.rb

Overview

Represents a constraint on method parameters.

Instance Method Summary collapse

Constructor Details

#initialize(parameters) ⇒ WithParameters

Initialize a new WithParameters constraint.



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# File 'lib/sus/respond_to.rb', line 13

def initialize(parameters)
	@parameters = parameters
end

Instance Method Details

#call(assertions, subject) ⇒ Object

Evaluate this constraint against method parameters.



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# File 'lib/sus/respond_to.rb', line 20

def call(assertions, subject)
	parameters = @parameters.dup
	
	assertions.nested(self) do |assertions|
		expected_name = parameters.shift
		
		subject.each do |type, name|
			case type
			when :req
				assertions.assert(name == expected_name, "parameter #{expected_name} is required, but was #{name}")
			when :opt
				break if expected_name.nil?
				assertions.assert(name == expected_name, "parameter #{expected_name} is specified, but was #{name}")
			else
				break
			end
		end
	end
end