}

    @Nested
    @DisplayName("Mockito stubbing for edge cases")
    class MockitoEdgeCases {
        @Test
        @DisplayName("getName can return null and empty strings via mock")
        void mock_nameEdgeValues() {
            // Arrange
            when(mockEntry.getName()).thenReturn(null, "", " ");

            // Act & Assert
            assertNull(mockEntry.getName(), "first call returns null");