assertEquals("→", ConsoleIcon.ACTION.getIcon(mockTerminal));
    }

    @Test
    @DisplayName("should return ASCII fallback when terminal uses US-ASCII")
    void shouldReturnAsciiFallbackWhenTerminalUsesAscii() {
        Terminal mockTerminal = mock(Terminal.class);
        when(mockTerminal.encoding()).thenReturn(StandardCharsets.US_ASCII);

        assertEquals("[OK]", ConsoleIcon.SUCCESS.getIcon(mockTerminal));