Easymock: matcher calls were used outside expectations

Question

I changed the return value of a method in my code from void to and Object. Then two junit test failed stating that an expect(...).andReturn(...) was missing. After adding those one test is fixed and the other still throws an exception which seems a bit weird:

java.lang.IllegalStateException: matcher calls were used outside expectations

The code which works for one but not the other is:

expect(myMock.foo(1l,FooEnum.A)).andReturn(EasyMock.anyObject(String.class));

Any ideas?

Solution 1

I changed to code to

expect(myMock.foo(1l,FooEnum.A)).andReturn(new Object());

and now it works. It's still strange why I get this error since I definitely return a new Object (and not null or anything)

Solution 2

EasyMock.anyObject(String.class) is a matcher, it isn't a String and can't be used as a String except for matching - matching being something like the following:

when(foo.bar(EasyMock.anyObject(String.class))).thenReturn("foo-bar")

P.S. you should avoid using new String() whenever possible; it's always better to use "" instead.

Comments

[Vihar]

isnt the when() a Mockito method rather than easymock one?

[Karrde]

yeah it's Mockito, I assume theres an equivalent in easymock though