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module RSpec
module Matchers
module BuiltIn
# @api private
# Provides the implementation for `match`.
# Not intended to be instantiated directly.
class Match < BaseMatcher
def initialize(expected)
super(expected)
@expected_captures = nil
end
# @api private
# @return [String]
def description
if @expected_captures && @expected.match(actual)
"match #{surface_descriptions_in(expected).inspect} with captures #{surface_descriptions_in(@expected_captures).inspect}"
else
"match #{surface_descriptions_in(expected).inspect}"
end
end
# @api private
# @return [Boolean]
def diffable?
true
end
# Used to specify the captures we match against
# @return [self]
def with_captures(*captures)
@expected_captures = captures
self
end
private
def match(expected, actual)
return match_captures(expected, actual) if @expected_captures
return true if values_match?(expected, actual)
return false unless can_safely_call_match?(expected, actual)
actual.match(expected)
end
def can_safely_call_match?(expected, actual)
return false unless actual.respond_to?(:match)
!(RSpec::Matchers.is_a_matcher?(expected) &&
(String === actual || Regexp === actual))
end
def match_captures(expected, actual)
match = actual.match(expected)
if match
match = ReliableMatchData.new(match)
if match.names.empty?
values_match?(@expected_captures, match.captures)
else
expected_matcher = @expected_captures.last
values_match?(expected_matcher, Hash[match.names.zip(match.captures)]) ||
values_match?(expected_matcher, Hash[match.names.map(&:to_sym).zip(match.captures)]) ||
values_match?(@expected_captures, match.captures)
end
else
false
end
end
end
# @api private
# Used to wrap match data and make it reliable for 1.8.7
class ReliableMatchData
def initialize(match_data)
@match_data = match_data
end
if RUBY_VERSION == "1.8.7"
# @api private
# Returns match data names for named captures
# @return Array
def names
[]
end
else
# @api private
# Returns match data names for named captures
# @return Array
def names
match_data.names
end
end
# @api private
# returns an array of captures from the match data
# @return Array
def captures
match_data.captures
end
protected
attr_reader :match_data
end
end
end
end
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