单元测试和集成测试的区别

单元测试：
单元测试被定义为一种软件测试，其中测试软件的各个组件。

软件产品的单元测试是在应用程序的开发过程中进行的。单个组件可以是单个函数或过程。单元测试通常由开发人员执行。它是一种测试方法，使用它来测试每个独立的模块，以确定开发人员自己是否有任何问题。

集成测试：
集成测试是测试两个软件单元或模块之间的接口的过程。它的重点是确定接口的正确性。集成测试的目的是暴露集成单元之间交互中的故障。一旦所有模块都进行了单元测试，就会执行集成测试。

单元测试和集成测试的区别：

Unit Testing	Integration Testing
In unit testing each module of the software is tested separately.	In integration testing all modules of the the software are tested combined.
In unit testing tester knows the internal design of the software.	In integration testing doesn’t know the internal design of the software.
Unit testing is performed first of all testing processes.	Integration testing is performed after unit testing and before system testing.
Unit testing is a white box testing.	Integration testing is a black box testing.
Unit testing is basically performed by the developer.	Integration testing is performed by the tester.
Detection of defects in unit testing is easy.	Detection of defects in integration testing is difficult.
It tests parts of the project without waiting for others to be completed.	It tests only after the completion of all parts.
Unit testing is less costly.	Integration testing is more costly.