PowerMockito: got InvalidUseOfMatchersException when use matchers mocking static method

Question

When I\'m testing this static method

public class SomeClass {
    public static long someMethod(Map map, String string, Long l, Log log) {
        ...
    }
         


        

Answer 1

Try replacing the isA() to another any() call like this

Mockito.when(SomeClass.someMethod(anyMap(), anyString(), anyLong(), any(Log.class))).thenReturn(1L);

[EDIT]

Check your stacktrace when you get the exception. Are you seeing any NoClassDefFoundError reported? I noticed when I hadn't included the javassist.jar in my project I got a similar error to you.

I use PowerMockito and these are the jars I added to a brand new project to run the code that @Tom posted

• powermock-mockito-1.4.10-full.jar
• mockito-all-1.8.5.jar
• javassist-3.15.0-GA.jar
• junit-4.8.2.jar
• common-logging-1.1.1.jar

Always a good idea to check that you're using compatible JAR versions, and also check if there are any other conflicting JARs in your projects classpath.