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Groovy example source code file (InterfaceConversionTest.groovy)

This example Groovy source code file (InterfaceConversionTest.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

groovytestcase, groovytestcase, interfaceconversiontest, interfaceconversiontest, interfaceconversiontestfoo, interfaceconversiontestfoo, object, object

The Groovy InterfaceConversionTest.groovy source code

 * Copyright 2003-2010 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.codehaus.groovy.runtime

class InterfaceConversionTest extends GroovyTestCase {

    void testClosureConversion() {
        def c1 = {Object[] args -> args?.length}
        def c2 = c1 as InterfaceConversionTestFoo
        assert !(c1 instanceof InterfaceConversionTestFoo)
        assert c2 instanceof InterfaceConversionTestFoo
        assert c2.a() == null
        assert c2.b(null) == 1

    void testMapConversion() {
        def m1 = [a: {1}, b: {2}]
        def m2 = m1 as InterfaceConversionTestFoo

        assert !(m1 instanceof InterfaceConversionTestFoo)
        assert m2 instanceof InterfaceConversionTestFoo
        assert m2.a() == 1
        assert m2.b(null) == 2

interface InterfaceConversionTestFoo {
    def a()

    def b(Integer i)

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