Groovy example source code file (SafeNavigationTest.groovy)

This example Groovy source code file (SafeNavigationTest.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

date, date, groovytestcase, groovytestcase, safenavigationtest, safenavigationtest

The Groovy SafeNavigationTest.groovy source code

package groovy

class SafeNavigationTest extends GroovyTestCase {

    void testNullNavigation() {
        def x = null
        def y = x?.bar
        assert y == null
    }

    void testNormalPropertyNavigation() {
        def x = ['a':456, 'foo':['bar':123, 'x':456], 'z':99]
        def y = x?.foo?.bar
        println("found y ${x?.foo?.bar}")
        assert y == 123
    }

    void testNullPropertyNavigation() {
        def x = null
        def y = x?.foo?.bar
        assert y == null

        def Date d = null
        def t = d?.time
        assert t == null
    }
    
    void testNormalMethodCall() {
        def x = 1234
        def y = x?.toString()
        assert y == "1234"
    }

    void testNullMethodCall() {
        def x = null
        def y = x?.toString()
        assert y == null
    }

}