JUnit命名约定规定所有测试方法名称都应以单词“test”开头。

The JUnit naming convention states that all test method names should begin with the word "test."

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JUnit 3.8 命名约定规定所有测试方法名称应以单词 test 开头。

The JUnit 3.8 naming convention states that all test method names should begin with word test.

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约定规定调用者必须满足方法的前置条件，且被调用的方法执行后必须满足后置条件。

The contract states the caller must abide by the preconditions of the method and the method, in turn, must return results that satisfy the postconditions associated with that method.

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And then we calculate changes, the convention is understood with respect to what is the zero, right.

然后我们计算改变,这个约定就是用来规定零点的位置的。

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