Unit testing defines a written contract about the behavior of each unit.

单元测试定义一个有关每个单元的行为的书面合同。

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Rewriting code alters the behavior and even the contract of code, while refactoring preserves its outward interface.

重写代码会修改代码的行为甚至合约，而重构保持对外接口不变。

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One of the major benefits of Design by Contract is that it provides explicit information within the interface or class itself about expected behavior.

契约式设计的一个主要优势是，它在接口或类本身当中提供了关于预期行为的显式信息。

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He added that there would be clauses in the Pistorius-Nike contract that make clear when the athlete's behavior can allow the company to cut its ties -- and law-breaking would often be among the reasons.

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"Microsoft's behavior has to be looked at through the scope of the contract, not through a copyright infringement view, " said Cullinan.

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