How do I make the `groovy` command exit non-zero for failing JUnit4 tests? - unit-testing

Question

When running JUnit tests with the groovy command using the built-in automatic test runner, it exits 0 even when tests fail. I'd like the command to exit non-zero if there are test failures. Is there a way I can do this?
#!/usr/bin/env groovy
import org.junit.*
class BasicTest {
#Test
void test_failure() {
assert false
}
}
$ groovy --version
Groovy Version: 3.0.2 JVM: 13.0.2 Vendor: Oracle Corporation OS: Mac OS X
$ groovy basic_test.groovy
JUnit 4 Runner, Tests: 1, Failures: 1, Time: 8
Test Failure: test_failure(BasicTest)
Assertion failed:
assert false
at org.codehaus.groovy.runtime.InvokerHelper.assertFailed(InvokerHelper.java:434)
...
$ echo $?
0
Thanks folks!

Answer 1

Not seen people running tests like that before... (writing them as a *nix script)
You can do this though, to catch a failure, and exiting with 1
#!/usr/bin/env groovy
import org.junit.*
import org.junit.rules.*
class BasicTest {
#Rule
public TestRule watchman = [
failed: {e, d ->
println d
e.printStackTrace()
System.exit(1)
}
] as TestWatcher
#Test
void test_failure() {
assert false
}
}