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Groovy example source code file (ClosureInClosureTest.groovy)

This example Groovy source code file (ClosureInClosureTest.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

closureinclosuretest, closureinclosuretest, groovytestcase, groovytestcase

The Groovy ClosureInClosureTest.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,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package groovy

/**
 * Bug illustrating the nested closures variable scope visibility issue.
 * l.each is ClosureInClosureBug$1 and it.each is ClosureInClosureBug$2
 * The variable text is not visible from ClosureInClosureBug$2.
 * Indeed, a closure can only see the variable defined outside this closure (one level up)
 * but cannot see what's in the second level.
 *
 * In order to make the test work, do not forget to uncomment the line "println(text)"
 *
 * @authour Guillaume Laforge
 */
class ClosureInClosureTest extends GroovyTestCase {
    void testInvisibleVariable() {
        def text = "test "

        def l = [1..11, 2..12, 3..13, 4..14]

        l.each{
            it.each{
                println(text)
            }
        }
    }

    static void main(args) {
        def bug = new ClosureInClosureTest()
        bug.testInvisibleVariable()
    }
}

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