NoClassDefFoundError: Mockito Bytebuddy

Question

I recently added Mockito to a maven project on eclipse, by adding the external jar "mockito-core-2.0.53-beta.jar", and upon attempting to create my first mock object (Line two in the function)

And upon running it, the console prints out the first line, then throws this error:

It seems like previously there was a similar issue, but it was supposedly fixed internally. https://github.com/raphw/byte-buddy/issues/99

What is going wrong here?

Answer 1

You simply forgot to add the dependencies to your project which are according to the pom file:

<dependency>
  <groupId>net.bytebuddy</groupId>
  <artifactId>byte-buddy</artifactId>
  <version>1.3.16</version>
  <scope>runtime</scope>
</dependency>
<dependency>
  <groupId>org.objenesis</groupId>
  <artifactId>objenesis</artifactId>
  <version>2.1</version>
  <scope>runtime</scope>
</dependency>

In other words you need to add byte-buddy 1.3.16 and objenesis 2.1 to your project too.

More details here

Answer 2

Instead adding

mockito-core

better option will to add

mockito-all

Refer to this link https://mvnrepository.com/artifact/org.mockito/mockito-all/2.0.2-beta

Answer 3

There is a post that explain the problem pretty well, you can find it here:

https://solidsoft.wordpress.com/2012/09/11/beyond-the-mockito-refcard-part-3-mockito-core-vs-mockito-all-in-mavengradle-based-projects/

If you are not using gradle or maven and you are just using mockit-core you should add these dependencies:

<dependency>
  <groupId>net.bytebuddy</groupId>
  <artifactId>byte-buddy</artifactId>
  <version>1.7.9</version>
  <scope>runtime</scope>
</dependency>
<dependency>
  <groupId>org.objenesis</groupId>
  <artifactId>objenesis</artifactId>
  <version>2.4</version>
  <scope>runtime</scope>
</dependency>