src/test/org/codehaus/groovy/runtime/WithResourceStreamClosedTest.groovy

/*
 * 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()
        }
    }

}