In this test case, we attempt to run a command “outside” of a transaction. This test case currently reaches the branch where we set inMultiDocumentTransaction to true on the OperationContext, since it's a case where we specify txnNumber and autocommit=false.

Eventually, the test case will fail this validation, but until then, opCtx->inMultiDocumentTransaction is true.

It seems to be a bug that opCtx->inMultiDocumentTransaction is true even though the test case should eventually fail with NoSuchTransaction.