{* ../../docs_src/dependencies/tutorial008c_an_py310.py hl[15:16] *}

この場合、（`HTTPException`やそれに類するものをraiseしていないため）クライアントには適切に*HTTP 500 Internal Server Error*レスポンスが返りますが、サーバーには**ログが一切残らず**、何がエラーだったのかを示す他の手がかりもありません。 😱

### `yield`と`except`を持つ依存関係では常に`raise`する { #always-raise-in-dependencies-with-yield-and-except }

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val client = OkHttpClient()

      fun run() {
        val request = Request.Builder()

testing everything. You can even copy & paste HTTP responses from your real web
server to create representative test cases. Or test that your code survives in
awkward-to-reproduce situations like 500 errors or slow-loading responses.


### Example

Use MockWebServer the same way that you use mocking frameworks like
[Mockito](https://github.com/mockito/mockito):

1. Script the mocks.
2. Run application code.

        }

        String failedProp = "failed${name}"
        // first wait for resources, or the failure marker from the wrapper script
        ant.waitfor(maxwait: maxWaitInSeconds, maxwaitunit: 'second', checkevery: '500', checkeveryunit: 'millisecond', timeoutproperty: failedProp) {
            or {
                resourceexists {
                    file(file: failureMarker.toString())
                }
                and {

    // Enqueue a request that'll cause MockWebServer to hang on QueueDispatcher.dispatch().
    val connection = server.url("/").toUrl().openConnection() as HttpURLConnection
    connection.readTimeout = 500
    assertFailsWith<SocketTimeoutException> {
      connection.responseCode
    }

    // Closing the server should unblock the dispatcher.
    server.close()
  }

  @Test

    }

    @Test
    @DisplayName("Test multiple operations in sequence")
    void testMultipleOperationsInSequence() {
        // Given
        long mid = 123L;
        int command = 0x73;
        int uid = 500;
        long sessionId = 999L;

        doNothing().when(messageBlock).setMid(mid);
        doNothing().when(messageBlock).setCommand(command);
        doNothing().when(messageBlock).setUid(uid);

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        buffer[bufferIndex] = 0x00;
        buffer[bufferIndex + 1] = 0x00;
        buffer[bufferIndex + 2] = 0x00;

        // totalParameterCount (4 bytes)
        SMBUtil.writeInt4(500, buffer, bufferIndex + 3);

        // totalDataCount (4 bytes)
        SMBUtil.writeInt4(1500, buffer, bufferIndex + 7);

        // parameterCount (4 bytes)
        SMBUtil.writeInt4(50, buffer, bufferIndex + 11);

        // AGGRESSIVE policy
        SmbOperationException.RetryPolicy aggressivePolicy = SmbOperationException.RetryPolicy.AGGRESSIVE;
        assertEquals(5, aggressivePolicy.getMaxAttempts());
        assertEquals(500, aggressivePolicy.getInitialDelayMs());
        assertEquals(60000, aggressivePolicy.getMaxDelayMs());
        assertEquals(1.5, aggressivePolicy.getBackoffMultiplier());
        assertTrue(aggressivePolicy.isExponentialBackoff());