testMultipleCommandsNotPermitted.kt

// Multiple Commands not permitted
            results["Multiple Commands not permitted"] = try {
                val iouState = IOUState(
                    amount = 10,
                    paid = 3,
                    lender = myInfo.name,
                    borrower = otherMember.name,
                    linearId = UUID.randomUUID(),
                    participants = listOf(myInfo.ledgerKeys.first(), otherMember.ledgerKeys.first())
                )

                val txBuilder = ledgerService.createTransactionBuilder()
                    .setNotary(notary.name)
                    .setTimeWindowBetween(Instant.now(), Instant.now().plusMillis(Duration.ofDays(1).toMillis()))
                    .addOutputState(iouState)
                    .addInputState(inputStateRef)
                    .addCommand(IOUContract.Issue())
                    .addCommand(IOUContract.Transfer())
                    .addSignatories(iouState.participants)

                @Suppress("DEPRECATION", "UNUSED_VARIABLE")
                val signedTransaction = txBuilder.toSignedTransaction()

                "Fail"

            } catch (e:Exception) {
                val exceptionMessage =  e.message ?: "No exception message"
                if (exceptionMessage.contains("Requires a single command.")) {
                    "Pass" }
                else {
                    "Contract failed but with a different Exception: ${e.message}"
                }
            }