CODEWITHSUNDEEP
kotlincorda
goedi
goedi

Reputation: 2103

Is it possible to create multiple transactions programmaticaly inside a ledger in a contract test in Corda?

Is it possible to create multiple transactions programmaticaly inside a ledger in a contract test in Corda? When I remove the forEach loop and copy and paste the code for each transaction (changing the output state to match what I wanna test) everything works as expected. But if I try to refactor it and generate transactions programmaticaly inside forEach loop as in the code example, my test fails.

@Test
fun simpleTest() {
    ledger {
        listOf(...).forEach { 
            transaction {
                command(participants, Commands.Command())
                input(Contract.ID, inputState)
                output(Contract.ID, outputState)
                failsWith("message")
            }
        }
    }
}

Upvotes: 0

Views: 163

Answers (1)

Adel Rustum
Adel Rustum

Reputation: 2548

In response to your reply to my comment; I think you should try using tweak.
In the example below you'll see how my transaction has the same command and output but I can tweak it and try different inputs:

@Test
@DisplayName("Testing different inputs.")
public void testDifferentInputs() {
    CustomState goodInput = new CustomState();
    CustomState badInput1 = new CustomState();
    CustomState badInput2 = new CustomState();
    CustomState output = new CustomState();

    ledger(ledgerServices, l -> {
        l.transaction(tx -> {
            // Same output and command.
            tx.output("mypackage.CustomState", output);
            tx.command(Collections.singletonList(myNode.getPublicKey()), new CustomStateContract.Commands.Create());
            // Tweak allows to tweak the transaction, in this case we're using bad input #1 and the transaction should fail.
            tx.tweak(tw -> {
                tw.input("mypackage.CustomState", badInput1);               
                return tw.failsWith("Bad Input State.");
            });
            // Tweak allows to tweak the transaction, in this case we're using bad input #2 and the transaction should fail.
            tx.tweak(tw -> {
                tw.input("mypackage.CustomState", badInput2);               
                return tw.failsWith("Bad Input State.");
            });
            // After the tweak we are using the good input and the transaction should pass.
            tx.input("mypackage.CustomState", goodInput);           
            return tx.verifies();
        });
        return Unit.INSTANCE;
    });
}

More examples here: https://docs.corda.net/tutorial-test-dsl.html

Upvotes: 1

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