Support for Mockito 4

[nspiess]

With Mockito 4, the deprecated org.mockito.Matchers has been removed in favour of org.mockito.ArgumentMatchers.
Hence, the latest version fails with a ClassNotFoundException.

I encountered this, while upgrading to Spring Boot 2.6.

stack trace:

java.lang.NoClassDefFoundError: org/mockito/Matchers

	at org.thymeleaf.testing.templateengine.context.web.WebProcessingContextBuilder.createMockServletContext(WebProcessingContextBuilder.java:275)
	at org.thymeleaf.testing.templateengine.context.web.WebProcessingContextBuilder.build(WebProcessingContextBuilder.java:144)
	at org.thymeleaf.testing.templateengine.engine.TestExecutor.executeTest(TestExecutor.java:392)
	at org.thymeleaf.testing.templateengine.engine.TestExecutor.executeTestable(TestExecutor.java:256)
	at org.thymeleaf.testing.templateengine.engine.TestExecutor.executeSequence(TestExecutor.java:279)
	at org.thymeleaf.testing.templateengine.engine.TestExecutor.executeTestable(TestExecutor.java:250)
	at org.thymeleaf.testing.templateengine.engine.TestExecutor.execute(TestExecutor.java:235)
	at org.thymeleaf.testing.templateengine.engine.TestExecutor.execute(TestExecutor.java:204)
	...
Caused by: java.lang.ClassNotFoundException: org.mockito.Matchers
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
	... 78 more

[nspiess]

will this actually be solved with #22? I see that mockito 4 is there as dependency..

[fabianfrz]

yes and no. It will only upgrade version 4. version 3 should stay untouched. v4 will be incompatible with the current spring build as it will work with Spring 6.

[OmarHawk]

mh, so testing with Spring Boot 2.6 wil stay broken for now? @danielfernandez - maybe you can say something about that as it seems you are the relevant guy here...

[LiuGavin]

I got the same error, with spring boot 2.4.12(spring core 5.3.12) and thymeleaf 3.0.12.RELEASE, mockito-core:4.2.0. Also, do you have some tutorial how to use the testing library? I follow the README to set up the most simple test case and only got this exception. Try to google but it seems there is not much resources out there?

Appreciated!