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[已解决] IllegalStateException：无法初始化插件MockMaker

[已解决] IllegalStateException：无法初始化插件MockMaker

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：

java.lang.IllegalStateException: Could not initialize plugin: interface org.mockito.plugins.MockMaker (alternate: null)
	at org.mockito.internal.configuration.plugins. PluginLoader$1.invoke(PluginLoader.java:74) ~[mockito-core-2.23.4.jar:na]
	at com.sun.proxy.$Proxy61.getHandler(Unknown Source) ~[na:na]
	at org.mockito.internal.util. MockUtil.isMock(MockUtil.java:81) ~[mockito-core-2.23.4.jar:na]
	...
	...
Caused by: java.lang.NoClassDefFoundError: net/bytebuddy/dynamic/loading/ ClassInjector$UsingReflection
	at org.mockito.internal.creation.bytebuddy. SubclassInjectionLoader.<init>(SubclassInjectionLoader.java:28) ~[mockito-core-2.23.4.jar:na]
	at org.mockito.internal.creation.bytebuddy. SubclassByteBuddyMockMaker.<init>(SubclassByteBuddyMockMaker.java:33) ~[mockito-core-2.23.4.jar:na]
	at org.mockito.internal.creation.bytebuddy. ByteBuddyMockMaker.<init>(ByteBuddyMockMaker.java:21) ~[mockito-core-2.23.4.jar:na]

	...
	...
	[spring-test-5.1.4.RELEASE.jar:5.1.4.RELEASE]
	... 19 common frames omitted
Caused by: java.lang.ClassNotFoundException: net.bytebuddy.dynamic. loading.ClassInjector$UsingReflection
	at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_171]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_171]
	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.8.0_171]
	at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_171]
	... 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”

    Mockito core dependency

    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.

    Correct jar version

    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！

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