groovy-core/src/test/groovy/TernaryOperatorTest.groovy

package groovy

class TernaryOperatorTest extends GroovyTestCase {

    void testSimpleUse() {
        def y = 5

        def x = (y > 1) ? "worked" : "failed"
        assert x == "worked"


        x = (y < 4) ? "failed" : "worked"
        assert x == "worked"
    }

    void testUseInParameterCalling() {
        def z = 123
        assertCalledWithFoo(z > 100 ? "foo" : "bar")
        assertCalledWithFoo(z < 100 ? "bar" : "foo")
       }

    def assertCalledWithFoo(param) {
        println "called with param ${param}"
        assert param == "foo"
    }
    
    void testwithBoolean(){
        def a = 1
        def x = a!=null ? a!=2 : a!=1
        assert x == true
        def y = a!=1 ? a!=2 : a!=1
        assert y == false
    }
    
    void testElvisOperator() {
        def a = 1
        def x = a?:2
        assert x==a
        a = null
        x = a?:2
        assert x==2
    }
}