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module RSpec
module Matchers
module BuiltIn
# @api private
#
# Used _internally_ as a base class for matchers that ship with
# rspec-expectations.
#
# ### Warning:
#
# This class is for internal use, and subject to change without notice. We
# strongly recommend that you do not base your custom matchers on this
# class. If/when this changes, we will announce it and remove this warning.
class BaseMatcher
include RSpec::Matchers::Pretty
attr_reader :actual, :expected, :rescued_exception
def initialize(expected = nil)
@expected = expected
end
def matches?(actual)
@actual = actual
match(expected, actual)
end
def match_unless_raises(*exceptions)
exceptions.unshift Exception if exceptions.empty?
begin
yield
true
rescue *exceptions => @rescued_exception
false
end
end
def failure_message_for_should
assert_ivars :@actual, :@expected
"expected #{@actual.inspect} to #{name_to_sentence}#{expected_to_sentence}"
end
def failure_message_for_should_not
assert_ivars :@actual, :@expected
"expected #{@actual.inspect} not to #{name_to_sentence}#{expected_to_sentence}"
end
def description
expected ? "#{name_to_sentence} #{@expected.inspect}" : name_to_sentence
end
def diffable?
false
end
def ==(other)
matches?(other)
end
private
def assert_ivars *ivars
raise "#{self.class.name} needs to supply #{to_sentence ivars}" unless ivars.all? { |v| instance_variables.map(&:intern).include? v }
end
end
end
end
end
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