mspec/lib/mspec/matchers/output.rb
require 'mspec/helpers/io'
class OutputMatcher
def initialize(stdout, stderr)
@out = stdout
@err = stderr
end
def matches?(proc)
@saved_out = $stdout
@saved_err = $stderr
@stdout = $stdout = IOStub.new
@stderr = $stderr = IOStub.new
proc.call
unless @out.nil?
case @out
when Regexp
return false unless $stdout =~ @out
else
return false unless $stdout == @out
end
end
unless @err.nil?
case @err
when Regexp
return false unless $stderr =~ @err
else
return false unless $stderr == @err
end
end
return true
ensure
$stdout = @saved_out
$stderr = @saved_err
end
def failure_message
expected_out = "\n"
actual_out = "\n"
unless @out.nil?
expected_out += " $stdout: #{@out.inspect}\n"
actual_out += " $stdout: #{@stdout.inspect}\n"
end
unless @err.nil?
expected_out += " $stderr: #{@err.inspect}\n"
actual_out += " $stderr: #{@stderr.inspect}\n"
end
["Expected:#{expected_out}", " got:#{actual_out}"]
end
def negative_failure_message
out = ""
out += " $stdout: #{@stdout.chomp.dump}\n" unless @out.nil?
out += " $stderr: #{@stderr.chomp.dump}\n" unless @err.nil?
["Expected output not to be:\n", out]
end
end
class Object
def output(stdout=nil, stderr=nil)
OutputMatcher.new(stdout, stderr)
end
end