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require 'mspec/helpers/io'
class ComplainMatcher
def initialize(complaint = nil, options = nil)
# the proper solution is to use double splat operator e.g.
# def initialize(complaint = nil, **options)
# but we are trying to minimize language features required to run MSpec
if complaint.is_a?(Hash)
@complaint = nil
@options = complaint
else
@complaint = complaint
@options = options || {}
end
end
def matches?(proc)
@saved_err = $stderr
@verbose = $VERBOSE
begin
err = $stderr = IOStub.new
$VERBOSE = @options.key?(:verbose) ? @options[:verbose] : false
Thread.current[:in_mspec_complain_matcher] = true
proc.call
ensure
$VERBOSE = @verbose
$stderr = @saved_err
Thread.current[:in_mspec_complain_matcher] = false
end
@warning = err.to_s
unless @complaint.nil?
case @complaint
when Regexp
return false unless @warning =~ @complaint
else
return false unless @warning == @complaint
end
end
return @warning.empty? ? false : true
end
def failure_message
if @complaint.nil?
["Expected a warning", "but received none"]
elsif @complaint.kind_of? Regexp
["Expected warning to match: #{@complaint.inspect}", "but got: #{@warning.chomp.inspect}"]
else
["Expected warning: #{@complaint.inspect}", "but got: #{@warning.chomp.inspect}"]
end
end
def negative_failure_message
if @complaint.nil?
["Unexpected warning: ", @warning.chomp.inspect]
elsif @complaint.kind_of? Regexp
["Expected warning not to match: #{@complaint.inspect}", "but got: #{@warning.chomp.inspect}"]
else
["Expected warning: #{@complaint.inspect}", "but got: #{@warning.chomp.inspect}"]
end
end
end
module MSpecMatchers
private def complain(complaint = nil, options = nil)
ComplainMatcher.new(complaint, options)
end
end
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