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1. 不要只是测试你的代码，还要测试你的假定。

   bù​yào zhǐ​shì cè​shì nǐ de dài​mǎ, hái​yào cè​shì nǐ de jiǎ​dìng.

   Don’t just test your code, but test your assumptions as well.

   Source: CCMatrix