如何在没有Powermock的情况下模拟静态方法

本文介绍了如何在没有Powermock的情况下模拟静态方法的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在JUnit中进行测试时，有什么方法可以模拟静态util方法?

我知道Powermock可以模拟静态调用，但是我不想使用Powermock.

还有其他选择吗?

解决方案

(我假设您可以使用Mockito)我没想到什么，但在类似情况下，我倾向于使用以下策略: 1):在被测类中，将静态直接调用替换为对包装了静态调用本身的包级方法的调用:

public class ToBeTested{ public void myMethodToTest(){ ... String s = makeStaticWrappedCall(); ... } String makeStaticWrappedCall(){ return Util.staticMethodCall(); } }

2)在测试时监视被测类并模拟包装的包级方法:

public class ToBeTestedTest{ @Spy ToBeTested tbTestedSpy = new ToBeTested(); @Before public void init(){ MockitoAnnotations.initMocks(this); } @Test public void myMethodToTestTest() throws Exception{ // Arrange doReturn("Expected String").when(tbTestedSpy).makeStaticWrappedCall(); // Act tbTestedSpy.myMethodToTest(); } }

如果您需要更多了解，这里是我写的一篇关于间谍的文章，其中包含类似的案例: sourceartists/mockito-spying

Is there any way we can mock the static util method while testing in JUnit?

I know Powermock can mock static calls, but I don't want to use Powermock.

Are there any alternatives?

解决方案

(I assume you can use Mockito though) Nothing dedicated comes to my mind but I tend to use the following strategy when it comes to situations like that:

1) In the class under test, replace the static direct call with a call to a package level method that wraps the static call itself:

public class ToBeTested{ public void myMethodToTest(){ ... String s = makeStaticWrappedCall(); ... } String makeStaticWrappedCall(){ return Util.staticMethodCall(); } }

2) Spy the class under test while testing and mock the wrapped package level method:

public class ToBeTestedTest{ @Spy ToBeTested tbTestedSpy = new ToBeTested(); @Before public void init(){ MockitoAnnotations.initMocks(this); } @Test public void myMethodToTestTest() throws Exception{ // Arrange doReturn("Expected String").when(tbTestedSpy).makeStaticWrappedCall(); // Act tbTestedSpy.myMethodToTest(); } }

Here is an article I wrote on spying that includes similar case, if you need more insight: sourceartists/mockito-spying