Groovy example source code file (ClosureInClosureTest.groovy)

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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()
    }
}