Mockito match any class argument

Question

Is there a way to match any class argument of the below sample routine   class A        public B method Class lt   extends A gt  a         How can I always return a new B   regardless of which class is passed into method  The following attempt only works for the specific case where A is matched    A a   new A    B b   new B    when a method eq A class    thenReturn b       EDIT  One solution is   Class lt   gt   any Class class

User · Answer

How about   when a method isA A class    thenReturn b     or   when a method  A notNull     thenReturn b

User · Answer

Two more ways to do it  see my comment on the previous answer by  Tomasz Nurkiewicz    The first relies on the fact that the compiler simply won t let you pass in something of the wrong type   when a method any Class class    thenReturn b     You lose the exact typing  the Class lt   extends A gt   but it probably works as you need it to   The second is a lot more involved but is arguably a better solution if you really want to be sure that the argument to method   is an A or a subclass of A   when a method Matchers argThat new ClassOrSubclassMatcher lt A gt  A class     thenReturn b     Where ClassOrSubclassMatcher is an org hamcrest BaseMatcher defined as   public class ClassOrSubclassMatcher lt T gt  extends BaseMatcher lt Class lt T gt  gt         private final Class lt T gt  targetClass       public ClassOrSubclassMatcher Class lt T gt  targetClass            this targetClass   targetClass              SuppressWarnings  unchecked       public boolean matches Object obj            if  obj    null                if  obj instanceof Class                    return targetClass isAssignableFrom  Class lt T gt   obj                                   return false             public void describeTo Description desc            desc appendText  Matches a class or subclass                     Phew  I d go with the first option until you really need to get finer control over what method   actually returns  -

User · Answer

If you have no idea which Package you need to import   import static org mockito ArgumentMatchers any  any SomeClass class    OR  import org mockito ArgumentMatchers  ArgumentMatchers any SomeClass class

User · Answer

There is another way to do that without cast   when a method Matchers  lt Class lt A gt  gt any     thenReturn b     This solution forces the method any   to return Class lt A gt  type and not its default value  Object

User · Answer

the solution from millhouse is not working anymore with recent version of mockito  This solution work with java 8 and mockito 2 2 9  where ArgumentMatcher is an instanceof org mockito ArgumentMatcher  public class ClassOrSubclassMatcher lt T gt  implements ArgumentMatcher lt Class lt T gt  gt        private final Class lt T gt  targetClass       public ClassOrSubclassMatcher Class lt T gt  targetClass            this targetClass   targetClass              Override     public boolean matches Class lt T gt  obj            if  obj    null                if  obj instanceof Class                    return targetClass isAssignableFrom  obj                                   return false            And the use  when a method ArgumentMatchers argThat new ClassOrSubclassMatcher lt  gt  A class     thenReturn b

[java] Mockito match any class argument

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