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You are confusing a Mock
with a Spy
.
In a mock all methods are stubbed and return "smart return types". This means that calling any method on a mocked class will do nothing unless you specify behaviour.
In a spy the original functionality of the class is still there but you can validate method invocations in a spy and also override method behaviour.
What you want is
MyProcessingAgent mockMyAgent = Mockito.spy(MyProcessingAgent.class);
A quick example:
static class TestClass {
public String getThing() {
return "Thing";
}
public String getOtherThing() {
return getThing();
}
}
public static void main(String[] args) {
final TestClass testClass = Mockito.spy(new TestClass());
Mockito.when(testClass.getThing()).thenReturn("Some Other thing");
System.out.println(testClass.getOtherThing());
}
Output is:
Some Other thing
NB: You should really try to mock the dependencies for the class being tested not the class itself.
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