java.lang.IllegalStateException: missing behavior definition for the preceding method call

If you see this while writing unit test with EasyMock, make sure you didn't forget to call replay().

For example:

MyFirstObject myFirstObject = createMock(MyFirstObject.class);
MyObject my = new MyObject();
expect(myFistObject.myMethod()).andReturn(123).anyTimes();
assertEquals(456, my.myOtherMethod()); 

may cause this exception, but:

MyFirstObject myFirstObject = createMock(MyFirstObject.class);
MyObject my = new MyObject();
expect(myFirstObject.myMethod()).andReturn(123).anyTimes();
replay(myFistObject);
assertEquals(456, my.myOtherMethod());

does not throw this exception.