优秀测试代码收集
autoload_dir "#{spec_dir}/only_once"

check = mock
check.should_receive(:loaded).once
ClassLoader.add_observer do |klass|
klass.name.should == "OnlyOnceSpec"
check.loaded
end

OnlyOnceSpec
OnlyOnceSpec
end

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check.should_receive(:loaded).once

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之前一直用mocha,?很少用rspec带的mock，这么一看语义也是非常清晰！

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