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Groovy example source code file (WithResourceStreamClosedTest.groovy)

This example Groovy source code file (WithResourceStreamClosedTest.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

bytearrayoutputstream, bytearrayoutputstream, groovytestcase, hallo, hallo, stringreader, stringwriter, stringwriter, welt, welt, withresourcestreamclosedtest

The Groovy WithResourceStreamClosedTest.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 org.codehaus.groovy.runtime;

/**
 * Test withWriter with inner loop closing the stream
 * in advance.
 * Some methods e.g. transformChar() close the streams.
 * If used inside a withWriter(), it must not lead to 
 * problems
 *
 * @author Joachim Baumann</a>
 * @version $Revision$
 */

class WithResourceStreamClosedTest extends GroovyTestCase {

    void testWithWriterStreamClosed() {

        def outer = new StringWriter()
        def reader = new StringReader("Hallo Welt")

        outer.withWriter { writer ->
            reader.transformChar(writer) { it }

        }
        assert outer.toString() == "Hallo Welt"
    }

    void testWithOutputStreamClosed() {
        def os = new ByteArrayOutputStream()
        os.withStream { out ->
            os.close()
        }
    }

}

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