How to enable assertions in the Gradle run task

Question

By default, Java disables assertions. (The test I'm using here is assert false; as the first line in main().)

I'd like to have them enabled while running my program with gradle run. What's the trick for doing this?

Sangsanger

Answer 1

There is a specific flag enableAssertions that you can set to enable assertions. Such flags are often more readable than working with the jvm args directly. It comes down to personal preferences I think.

Instead of working with applicationDefaultJvmArgs you can add the following to your build.gradle file:

run {
    enableAssertions = true
}

This configures the run task to enable assertions.

The run task is of type JavaExec, have a look at the documentation if you are interested in other parameters that you can set (e.g., workingDir or heapMaxSize).

Ceratoid

Thanks for referring to the documentation where this can be found instead of just letting this be some magic/mystery/secret knowledge. – Ricardo

Answer 2

tasks.withType(JavaExec) {
     enableAssertions = true
}

Corydalis