"Result should be either Unicode or ASCII fallback for " + icon + ", got: " + result);
        }
    }

    @Test
    @DisplayName("should handle terminal with null encoding")
    void shouldHandleTerminalWithNullEncoding() {
        Terminal mockTerminal = mock(Terminal.class);
        when(mockTerminal.encoding()).thenReturn(null);

        // Should fall back to system default charset