assertNotNull(result, "Icon result should not be null for " + icon);

            // Result should be consistent with charset's canEncode capability
            boolean canEncode = StandardCharsets.ISO_8859_1.newEncoder().canEncode(icon.getUnicodeChar());
            String expected = canEncode ? String.valueOf(icon.getUnicodeChar()) : icon.getAsciiFallback();

     * @return the Unicode character if supported, otherwise the ASCII fallback
     */
    public String getIcon(Terminal terminal) {
        Charset charset = getTerminalCharset(terminal);
        return charset.newEncoder().canEncode(unicodeChar) ? String.valueOf(unicodeChar) : asciiFallback;
    }

    /**
     * Gets the charset used by the terminal for output.
     * Falls back to the system default charset if terminal charset is not available.

    }

    @Override
    public boolean canDecode(CharSequence chars) {
      checkNotNull(chars);
      chars = trimTrailingPadding(chars);
      if (!alphabet.isValidPaddingStartPosition(chars.length())) {
        return false;
      }
      for (int i = 0; i < chars.length(); i++) {
        if (!alphabet.canDecode(chars.charAt(i))) {
          return false;
        }
      }

    assertThat(encoding.canDecode(encoded)).isTrue();
    assertThat(encoding.decode(encoded)).isEqualTo(decoded.getBytes(UTF_8));
  }

  private static void testDecodesByBytes(BaseEncoding encoding, String encoded, byte[] decoded) {
    assertThat(encoding.canDecode(encoded)).isTrue();
    assertThat(encoding.decode(encoded)).isEqualTo(decoded);
  }