case UNSPECIFIED:
                result.append("Unspecified error");
                break;
            default:
                result.append("Unknown error code: ").append(errorCode);
            }
            break;
        default:
            result.append("unknown error class: ").append(errorClass);
        }
        return result.toString();
    }

    /**

        when(session.getRequest()).thenReturn(executionRequest);
        Session sessionv4 = mock(Session.class);
        when(session.getSession()).thenReturn(sessionv4);
        when(sessionv4.getToolchains()).thenReturn(toolchainModels);

        List<Toolchain> toolchains = toolchainManager.getToolchains(session, "unknown", null);

		return i, Number, err
	case '-':
		if c = d.next(); c < '0' || c > '9' {
			return nil, Unknown, d.mkError(ErrSyntax, "in negative numeric literal")
		}
		n, err := d.number()
		if err != nil {
			return nil, Unknown, err
		}
		return -n, Number, nil
	case 'f':
		if d.remaining() < 4 {
			return nil, Unknown, d.mkError(ErrUnexpectedEOF)
		}
		//nolint:gocritic

        }
    }

    @Test
    public void testCreateProviderUnknown() {
        RdmaProvider provider = RdmaProviderFactory.createProvider("unknown");
        assertNull(provider, "Unknown provider should return null");
    }

    @Test
    public void testSelectBestProvider() {
        RdmaProvider provider = RdmaProviderFactory.selectBestProvider();

    @Mock
    private Map<Integer, KerberosKey> mockKeys;

    /**
     * Test parsing with an unknown auth type.
     * Expects an empty list of authorizations.
     * @throws PACDecodingException should not be thrown
     */
    @Test
    void testParseUnknownAuthType() throws PACDecodingException {
        // GIVEN an unknown auth type
        int unknownAuthType = -1;
        byte[] emptyToken = new byte[0];

        buffer.append((groupId != null && !groupId.isEmpty()) ? groupId : "[unknown-group-id]");
        buffer.append(':');
        buffer.append((artifactId != null && !artifactId.isEmpty()) ? artifactId : "[unknown-artifact-id]");
        buffer.append(':');
        buffer.append((version != null && !version.isEmpty()) ? version : "[unknown-version]");

        return buffer.toString();
    }

    /**

     */
    String getSource();

    /**
     * Gets the one-based index of the line containing the problem. The line number should refer to some text file that
     * is given by {@link #getSource()}.
     *
     * @return The one-based index of the line containing the problem or a non-positive value if unknown.
     */
    int getLineNumber();

    /**

            fail("Should have thrown InvalidQueryException");
        } catch (InvalidQueryException e) {
            // Expected exception for unknown query type
            assertTrue(e.getMessage().contains("Unknown q:"));
        }
    }

        assertEquals(specificHandler, corsHandlerFactory.get(specificOrigin));

        // Execute & Verify - unknown origin should return wildcard handler
        assertEquals(wildcardHandler, corsHandlerFactory.get("https://unknown.com"));
    }

    @Test
    public void test_get_nonExistentOriginWithoutWildcard() {
        // Setup
        String origin = "https://example.com";

    }

    @Test
    @DisplayName("Unknown DOS error code yields empty Optional")
    void testUnknownCode() {
        Optional<Integer> noMatch = findNtStatus(0xdeadbeef);
        assertFalse(noMatch.isPresent(), "Mapping for unknown code should be absent");
    }

    @Test
    @DisplayName("Mocked consumer receives correct NTSTATUS value")