Using TestNG with Groovy

// require(groupId:'org.testng', artifactId:'testng', version='5.56')
import org.testng.annotations.*
import org.testng.TestNG
import org.testng.TestListenerAdapter

class StorerIntegrationTest {

    private storer

    @BeforeClass
    def setUp() {
        storer = new Storer()
    }

    private checkPersistAndReverse(value, reverseValue) {
        storer.put(value)
        assert value == storer.get()
        assert reverseValue == storer.getReverse()
    }

    @Test
    void shouldPersistAndReverseStrings() {
        checkPersistAndReverse 'hello', 'olleh'
    }

    @Test
    void shouldPersistAndReverseNumbers() {
        checkPersistAndReverse 123.456, -123.456
    }

    @Test
    void shouldPersistAndReverseLists() {
        checkPersistAndReverse([1, 3, 5], [5, 3, 1])
    }
}

def testng = new TestNG()
testng.setTestClasses([StorerIntegrationTest] as Class[])
testng.addListener(new TestListenerAdapter())
testng.run()