Class: Sus::RespondTo

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

Overview

Represents a predicate that checks if an object responds to a method.

Defined Under Namespace

Classes: WithOptions, WithParameters

Instance Method Summary collapse

Constructor Details

#initialize(method) ⇒ RespondTo

Initialize a new RespondTo predicate.



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# File 'lib/sus/respond_to.rb', line 76

def initialize(method)
	@method = method
	@parameters = nil
	@options = nil
end

Instance Method Details

#call(assertions, subject) ⇒ Object

Evaluate this predicate against a subject.



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# File 'lib/sus/respond_to.rb', line 99

def call(assertions, subject)
	assertions.nested(self) do |assertions|
		condition = subject.respond_to?(@method)
		assertions.assert(condition, self)
		
		if condition and (@parameters or @options)
			parameters = subject.method(@method).parameters
			@parameters.call(assertions, parameters) if @parameters
			@options.call(assertions, parameters) if @options
		end
	end
end

#print(output) ⇒ Object

Print a representation of this predicate.



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# File 'lib/sus/respond_to.rb', line 92

def print(output)
	output.write("respond to ", :variable, @method.to_s, :reset)
end

#with_options(*options) ⇒ Object

Specify that the method should have specific keyword options.



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# File 'lib/sus/respond_to.rb', line 85

def with_options(*options)
	@options = WithOptions.new(options)
	return self
end