class RSpec::Matchers::BuiltIn::RespondTo

Public Class Methods

new(*names) click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 5
def initialize(*names)
  @names = names
  @expected_arity = nil
end

Public Instance Methods

argument() click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 35
def argument
  self
end
Also aliased as: arguments
arguments()
Alias for: argument
description() click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 26
def description
  "respond to #{pp_names}#{with_arity}"
end
does_not_match?(actual) click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 14
def does_not_match?(actual)
  find_failing_method_names(actual, :select).empty?
end
failure_message_for_should() click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 18
def failure_message_for_should
  "expected #{@actual.inspect} to respond to #{@failing_method_names.collect {|name| name.inspect }.join(', ')}#{with_arity}"
end
failure_message_for_should_not() click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 22
def failure_message_for_should_not
  failure_message_for_should.sub(/to respond to/, 'not to respond to')
end
matches?(actual) click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 10
def matches?(actual)
  find_failing_method_names(actual, :reject).empty?
end
with(n) click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 30
def with(n)
  @expected_arity = n
  self
end

Private Instance Methods

find_failing_method_names(actual, filter_method) click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 42
def find_failing_method_names(actual, filter_method)
  @actual = actual
  @failing_method_names = @names.send(filter_method) do |name|
    @actual.respond_to?(name) && matches_arity?(actual, name)
  end
end
matches_arity?(actual, name) click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 49
def matches_arity?(actual, name)
  return true unless @expected_arity

  actual_arity = actual.method(name).arity
  if actual_arity < 0
    # ~ inverts the one's complement and gives us the number of required args
    ~actual_arity <= @expected_arity
  else
    actual_arity == @expected_arity
  end
end
pp_names() click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 66
def pp_names
  # Ruby 1.9 returns the same thing for array.to_s as array.inspect, so just use array.inspect here
  @names.length == 1 ? "##{@names.first}" : @names.inspect
end
with_arity() click to toggle source
# File lib/rspec/matchers/built_in/respond_to.rb, line 61
def with_arity
  @expected_arity.nil?? "" :
    " with #{@expected_arity} argument#{@expected_arity == 1 ? '' : 's'}"
end