2025年JMokit中的@Mocked与@Injectable区别

科技前沿 • 2025-02-14 19:59 • 阅读 42

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JMokit中的@Mocked与@Injectable区别

官方Tutorials：http://jmockit.org/gettingStarted.html#mockObject

首先，两个注解都可用于测试类成员mock field与参数用例参数mock parameter，对mock field的注解作用于整个测试类，而对mock parameter的注解只针对该测试用例

@Mocked与@Injectable的区别：前者针对类型，后者针对单个实例。

有一个类ToBeMocked，具备一个public方法fun()

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public Class ToBeMocked { public String fun() { return "call original method"; } }

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以下分为四种情况讨论

@Mocked作用于测试类成员

整个测试类中被mock的类型的所有实例都将被mocked，被mocked的类所有非private方法都将处于mocked状态,被mocked的方法默认返回值null

讯享网public class MockedAndInjectableTest1 { @Mocked ToBeMocked instance; @Test public void test() { System.out.println(instance.fun()); //null ToBeMocked newInstance = new ToBeMocked(); System.out.println(newInstance.fun()); //null } }

@Mocked作用于测试用例参数

该用例参数中被注解的类型将处于mock状态

public class MockedAndInjectableTest { @Test public void test1(@Mocked final ToBeMocked instance) { System.out.println(instance.fun()); //null ToBeMocked newInstance = new ToBeMocked(); System.out.println(newInstance.fun()); //null } @Test public void test2() { ToBeMocked newInstance = new ToBeMocked(); System.out.println(newInstance.fun()); //call original method } }

@Injectable作用于测试类成员

被注解的单个实例在整个测试类中将处于mocked状态

讯享网public class MockedAndInjectableTest { @Injectable ToBeMocked instance; @Test public void test() { System.out.println(instance.fun()); //null ToBeMocked newInstance = new ToBeMocked(); System.out.println(newInstance.fun()); //call original method } }

@Injectable作用于测试类参数

被注解的单个实例在该测试用例中将处于mocked状态

public class MockedAndInjectableTest { @Test public void test1(@Injectable final ToBeMocked instanceA) { System.out.println(instanceA.fun()); //null ToBeMocked newInstance = new ToBeMocked(); System.out.println(newInstance.fun()); //call original method } @Test public void test2() { ToBeMocked newInstance = new ToBeMocked(); System.out.println(newInstance.fun()); //call original method } }

2025年JMokit中的@Mocked与@Injectable区别

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