1 package org.mockitousage.bugs; 2 3 import static org.assertj.core.api.Assertions.assertThat; 4 import static org.mockito.Mockito.mock; 5 import static org.mockito.Mockito.when; 6 7 import org.junit.Test; 8 9 public class ConfusedSignatureTest { 10 11 @Test should_mock_method_which_has_generic_return_type_in_superclass_and_concrete_one_in_interface()12 public void should_mock_method_which_has_generic_return_type_in_superclass_and_concrete_one_in_interface() { 13 Sub mock = mock(Sub.class); 14 // The following line resulted in 15 // org.mockito.exceptions.misusing.MissingMethodInvocationException: 16 // when() requires an argument which has to be 'a method call on a mock'. 17 // Presumably confused by the interface/superclass signatures. 18 when(mock.getFoo()).thenReturn("Hello"); 19 20 assertThat(mock.getFoo()).isEqualTo("Hello"); 21 } 22 23 public class Super<T> { 24 private T value; 25 Super(T value)26 public Super(T value) { 27 this.value = value; 28 } 29 getFoo()30 public T getFoo() { return value; } 31 } 32 33 public class Sub 34 extends Super<String> 35 implements iInterface { 36 Sub(String s)37 public Sub(String s) { 38 super(s); 39 } 40 } 41 42 public interface iInterface { getFoo()43 String getFoo(); 44 } 45 } 46