契约是正式的规格说明，设计必须满足它，而且各种形式的测试也都应该使用它。
The contract is the formal specification, its what the design has to meet and its this that should be used for all forms of testing
契约是正式的规格说明，设计必须满足它，而且各种形式的测试也都应该使用它。
The contract is the formal specification, its what the design has to meet and its this that should be used for all forms of testing
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