///

## Verdopplung vermeiden { #reduce-duplication }

Die Reduzierung von Code-Verdoppelung ist eine der Kernideen von **FastAPI**.

Da die Verdopplung von Code die Wahrscheinlichkeit von Fehlern, Sicherheitsproblemen, Problemen mit der Desynchronisation des Codes (wenn Sie an einer Stelle, aber nicht an der anderen aktualisieren) usw. erhöht.

  val result = Buffer()
  var i = 0
  while (i < address.size) {
    if (i == longestRunOffset) {
      result.writeByte(':'.code)
      i += longestRunLength
      if (i == 16) result.writeByte(':'.code)
    } else {
      if (i > 0) result.writeByte(':'.code)
      val group = address[i] and 0xff shl 8 or (address[i + 1] and 0xff)
      result.writeHexadecimalUnsignedLong(group.toLong())
      i += 2
    }

	}
	if err := DB.Model(&user).Association("Languages").Append(map[string]interface{}{"code": "am2m_map_3", "name": "AppendMap3"}); err != nil {
		t.Fatalf("append map 3: %v", err)
	}
	AssertAssociationCount(t, user, "Languages", 3, "after append 3 maps total")

	// Verify codes exist
	var langs []Language
	if err := DB.Model(&user).Association("Languages").Find(&langs); err != nil {
		t.Fatalf("find languages: %v", err)
	}

Sie können also weiterhin die `HTTPException` von **FastAPI** wie üblich in Ihrem Code auslösen.

Aber wenn Sie einen Exceptionhandler registrieren, sollten Sie ihn für die `HTTPException` von Starlette registrieren.

            response.setAsyncHandled(true);

            assertTrue(response.isAsyncHandled());
        }
    }

    @Nested
    @DisplayName("Error Code Tests")
    class ErrorCodeTests {

        @Test
        @DisplayName("Should return status as error code")
        void testGetErrorCode() {
            int status = NtStatus.NT_STATUS_ACCESS_DENIED;
            response.setStatusForTest(status);

    }

    @ParameterizedTest
    @ValueSource(ints = { NtStatus.NT_STATUS_SUCCESS, NtStatus.NT_STATUS_NONE_MAPPED, 0x00000107 })
    @DisplayName("resolveSids(DcerpcHandle,...) accepts success/none/some-not-mapped codes")
    void resolveSids_allowsCertainRetvals_noThrow(int ret) throws Exception {
        SIDCacheImpl cache = new SIDCacheImpl(mock(CIFSContext.class));
        DcerpcHandle handle = mock(DcerpcHandle.class);

    /** Preferred lease version (1 or 2) */
    protected int leaseVersion = 2;
    /** Lease break timeout in seconds (per MS-SMB2 spec) */
    protected int leaseBreakTimeout = 60;
    /** Whether to use NT status codes instead of DOS error codes */
    protected boolean useNtStatus = true;
    /** Whether to use extended security negotiation */
    protected boolean useExtendedSecurity = true;
    /** Force use of extended security negotiation */

    public String toString() {
      return "IsOdd";
    }
  }

  /**
   * Generates a new Predicate per call.
   *
   * <p>Creating a new Predicate each time helps catch cases where code is using {@code x == y}
   * instead of {@code x.equals(y)}.
   */
  private static IsOdd isOdd() {
    return new IsOdd();
  }

  /*
   * Tests for Predicates.alwaysTrue().
   */

  public void testAlwaysTrue_apply() {

        assertEquals(1, notifications.size());
        assertEquals(fileName, notifications.get(0).getFileName());
    }

    @Test
    @DisplayName("Should test isErrorResponseStatus with various status codes")
    void testIsErrorResponseStatus() throws Exception {
        // Test with NT_STATUS_NOTIFY_ENUM_DIR - should not be error
        setStatus(response, NtStatus.NT_STATUS_NOTIFY_ENUM_DIR);

In any case, the language code should be in the file <a href="https://github.com/fastapi/fastapi/blob/master/docs/language_names.yml" class="external-link" target="_blank">docs/language_names.yml</a>.