groovy-core/src/test/groovy/ClosureMethodCallTest.groovy

package groovy

/** 
 * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
 * @version $Revision$
 */
class ClosureMethodCallTest extends GroovyTestCase {

    void testCallingClosureWithMultipleArguments() {
        def foo
        def closure = { a, b -> foo = "hello ${a} and ${b}".toString() }
        
        closure("james", "bob")

        assert foo == "hello james and bob"

        closure.call("sam", "james")

        assert foo == "hello sam and james"
    }
    
    void testClosureAsLocalVar() {
        def local = { Map params -> params.x * params.y  }
        assert local(x : 2, y : 3) == 6
    }
    
    void testClosureDirectly() {
        assert { Map params -> params.x * params.y }(x : 2, y : 3) == 6
    }
    
    def attribute
    
    void testClosureAsAttribute() {
        attribute = { Map params ->  params.x * params.y  } 
        assert attribute(x : 2, y : 3) == 6
    }
    
    void testSystemOutPrintlnAsAClosure() {
        def closure = System.out.&println
        closure("Hello world")
    }
}