message: Add panic message when `httpMalformedRequestTests` fail
diff: @@ -486,13 +486,15 @@ class ServerProtocolTestGenerator(
  ) {
  val (_, outputT) = operationInputOutputTypes[operationShape]!!
  + val panicMessage = "request should have been rejected, but we accepted it; we parsed operation input `{:?}`"
  +
  rust("// Use the `OperationRegistryBuilder`")
  rustBlock("") {
  with(testCase.request) {
  // TODO(https://github.com/awslabs/smithy/issues/1102): `uri` should probably not be an `Optional`.
  renderHttpRequest(uri.get(), method, headers, body.orNull(), queryParams, host.orNull())
  }
  - makeRequest(operationShape, this, writable("todo!() as $outputT"))
  + makeRequest(operationShape, this, writable("""panic!("$panicMessage", &input) as $outputT"""))
  checkResponse(this, testCase.response)
  }
  @@ -502,7 +504,7 @@ class ServerProtocolTestGenerator(
  // TODO(https://github.com/awslabs/smithy/issues/1102): `uri` should probably not be an `Optional`.
  renderHttpRequest(uri.get(), method, headers, body.orNull(), queryParams, host.orNull())
  }
  - makeRequest2(operationShape, operationSymbol, this, writable("todo!() as $outputT"))
  + makeRequest2(operationShape, operationSymbol, this, writable("""panic!("$panicMessage", &input) as $outputT"""))
  checkResponse(this, testCase.response)
  }
  }
  