To me, unit tests are fast running tests that typically test individual classes that don't have heavy external dependencies like databases.
对我来说，单元测试是快速运行的 测试，通常测试没有大的外部依赖项（如数据库）的单独的类。
2
Creating and running unit tests with WicketTester is fast and simple, as shown below.
使用WicketTester创建、运行单元测试非常快速、简单，如下所示。
3
Jug kettles are fast and convenient, but their fuel - electricity from the national grid - produces almost three times more greenhouse gas for each unit of heat than burning gas in the home does.