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require 'mspec/helpers/io'
class ComplainMatcher
def initialize(complaint)
@complaint = complaint
end
def matches?(proc)
@saved_err = $stderr
@stderr = $stderr = IOStub.new
@verbose = $VERBOSE
$VERBOSE = false
proc.call
unless @complaint.nil?
case @complaint
when Regexp
return false unless $stderr =~ @complaint
else
return false unless $stderr == @complaint
end
end
return $stderr.empty? ? false : true
ensure
$VERBOSE = @verbose
$stderr = @saved_err
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: #{@stderr.chomp.inspect}"]
else
["Expected warning: #{@complaint.inspect}", "but got: #{@stderr.chomp.inspect}"]
end
end
def negative_failure_message
if @complaint.nil?
["Unexpected warning: ", @stderr.chomp.inspect]
elsif @complaint.kind_of? Regexp
["Expected warning not to match: #{@complaint.inspect}", "but got: #{@stderr.chomp.inspect}"]
else
["Expected warning: #{@complaint.inspect}", "but got: #{@stderr.chomp.inspect}"]
end
end
end
class Object
def complain(complaint=nil)
ComplainMatcher.new(complaint)
end
end
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