}

      else -> {
        throw ProtocolException("Unknown control opcode: " + opcode.toHexString())
      }
    }
  }

  @Throws(IOException::class)
  private fun readMessageFrame() {
    val opcode = this.opcode
    if (opcode != OPCODE_TEXT && opcode != OPCODE_BINARY) {
      throw ProtocolException("Unknown opcode: ${opcode.toHexString()}")
    }

    readMessage()

        // Test other opCode, resultCode, questionType, recordType branches
        packet.opCode = NameServicePacket.WACK;
        packet.resultCode = NameServicePacket.SRV_ERR;
        packet.questionType = NameServicePacket.NBSTAT;
        packet.recordType = NameServicePacket.NBSTAT;
        expectedString =

        final String questionClassString;
        String recordTypeString;
        final String recordClassString;

        opCodeString = switch (opCode) {
        case QUERY -> "QUERY";
        case WACK -> "WACK";
        default -> Integer.toString(opCode);
        };
        resultCodeString = switch (resultCode) {
        case FMT_ERR -> "FMT_ERR";
        case SRV_ERR -> "SRV_ERR";

        // Set 'opCode' field in superclass to a value other than QUERY (0)
        Field opCodeField = NameServicePacket.class.getDeclaredField("opCode");
        opCodeField.setAccessible(true);
        opCodeField.set(nameQueryResponse, 7); // WACK opCode, which is not QUERY (0)

        // Ensure 'resultCode' is 0 for this test to isolate opCode condition

    public String toString() {
        String opCodeString, resultCodeString, questionTypeString, recordTypeString;

        opCodeString = switch (this.opCode) {
        case QUERY -> "QUERY";
        case WACK -> "WACK";
        default -> Integer.toString(this.opCode);
        };
        resultCodeString = switch (this.resultCode) {
        case FMT_ERR -> "FMT_ERR";
        case SRV_ERR -> "SRV_ERR";

            throw new IOException("Connection not established");
        }

        try {
            // In real implementation, this would perform RDMA write:
            // Similar to rdmaRead but with IBV_WR_RDMA_WRITE opcode

            log.debug("DiSNI RDMA write completed, {} bytes", length);

        } catch (Exception e) {
            state = RdmaConnectionState.ERROR;

    assertFailsWith<ProtocolException> {
      clientReader.processNextFrame()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Expected continuation opcode. Got: 2")
    }
  }

  @Test fun emptyPingCallsCallback() {
    data.write("8900".decodeHex()) // Empty ping
    clientReader.processNextFrame()
    callback.assertPing(EMPTY)
  }

	}
	readDataInto := func(dst []byte, s ws.State, want ws.OpCode) ([]byte, error) {
		dst = dst[:0]
		for {
			hdr, err := wsReader.NextFrame()
			if err != nil {
				return nil, err
			}
			if hdr.OpCode.IsControl() {
				if err := controlHandler(hdr, &wsReader); err != nil {
					return nil, err
				}
				continue
			}
			if hdr.OpCode&want == 0 {
				if err := wsReader.Discard(); err != nil {

Então, você pode procurar por essa exceção específica dentro da dependência com `except AlgumaExcecao`.

Da mesma forma, você pode utilizar `finally` para garantir que os passos de saída são executados, com ou sem exceções.

{* ../../docs_src/dependencies/tutorial007_py310.py hl[3,5] *}

## Subdependências com `yield` { #sub-dependencies-with-yield }

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial008b_py310.py!}
```

Isso significa que `item` pode ser um `int` ou um `str`.

#### Possivelmente `None` { #possibly-none }

Você pode declarar que um valor pode ter um tipo, como `str`, mas que ele também pode ser `None`.

//// tab | Python 3.10+

```Python hl_lines="1"
{!> ../../docs_src/python_types/tutorial009_py310.py!}
```

////