原文： https://howtodoinjava.com/mockito/plugin-mockmaker-error/

如果您正在使用 Spring boot 2.x 应用，它们自动包含 Mockito Core 依赖项，那么您将遇到此错误，那么您 可以尝试建议的解决方案。

1. 问题

Mockito 核心依赖于称为字节伙伴的库，而当 mocito 找不到匹配的字节伙伴 jar 版本时，通常会出现此问题。 错误看起来像这样：

  1. java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
  2.     at org.mockito.internal.configuration.plugins. PluginLoader$1.invoke(PluginLoader.java:74) ~[mockito-core-2.23.4.jar:na]
  3.     at com.sun.proxy.$Proxy61.getHandler(Unknown Source) ~[na:na]
  4.     at org.mockito.internal.util. MockUtil.isMock(MockUtil.java:81) ~[mockito-core-2.23.4.jar:na]
  5.     ...
  6.     ...
  7. Caused by: java.lang.NoClassDefFoundError: net/bytebuddy/dynamic/loading/ ClassInjector$UsingReflection
  8.     at org.mockito.internal.creation.bytebuddy. SubclassInjectionLoader.<init>(SubclassInjectionLoader.java:28) ~[mockito-core-2.23.4.jar:na]
  9.     at org.mockito.internal.creation.bytebuddy. SubclassByteBuddyMockMaker.<init>(SubclassByteBuddyMockMaker.java:33) ~[mockito-core-2.23.4.jar:na]
  10.     at org.mockito.internal.creation.bytebuddy. ByteBuddyMockMaker.<init>(ByteBuddyMockMaker.java:21) ~[mockito-core-2.23.4.jar:na]
  12.     ...
  13.     ...
  14.     [spring-test-5.1.4.RELEASE.jar:5.1.4.RELEASE]
  15.     ... 19 common frames omitted
  16. Caused by: java.lang.ClassNotFoundException: net.bytebuddy.dynamic. loading.ClassInjector$UsingReflection
  17.     at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_171]
  18.     at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_171]
  19.     at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.8.0_171]
  20.     at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_171]
  21.     ... 42 common frames omitted

2. 解决方案

  • Find out the mockito core version your project is using. In eclipse, you can check in project build path by navigating to

    右键单击“项目 -> 属性 -> Java 构建路径 -> 库选项卡”


[已解决] `IllegalStateException`：无法初始化插件`MockMaker` - 图1
Mockito 核心依赖项

  • 在 Maven 仓库中搜索该版本的 Mockito Core。 对我来说是： https://mvnrepository.com/artifact/org.mockito/mockito-core/2.23.4

  • Look at the Compile Dependencies section. Note down the correct dependent version of byte-buddy and include in the project. If the jar is already included with some other version, override the version with this correct version.
    [已解决] `IllegalStateException`：无法初始化插件`MockMaker` - 图2
    正确的 jar 版本

生成应用，然后再次运行测试。 您与 MockMaker 有关的问题必须立即解决。

学习愉快！