de.langmi.spring.batch.examples.basics.tasklet.SimpleTaskletStepTest.java Source code

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Here is the source code for de.langmi.spring.batch.examples.basics.tasklet.SimpleTaskletStepTest.java

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/**
 * 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 de.langmi.spring.batch.examples.basics.tasklet;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.junit.After;
import static org.junit.Assert.assertEquals;
import org.junit.Before;
import org.junit.Test;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.repeat.RepeatStatus;

/**
 * Simple test for {@link SimpleTaskletStep}.
 *
 * @author Michael R. Lange <michael.r.lange@langmi.de>
 * @see <a
 * href="http://stackoverflow.com/questions/1119385/junit-test-for-system-out-println">JUnit
 * test for system.out.println</a>
 */
public class SimpleTaskletStepTest {

    /**
     * Stream for catching System.out.
     */
    private final ByteArrayOutputStream newSysOut = new ByteArrayOutputStream();
    private PrintStream oldSysOut;
    private final Tasklet tasklet = new SimpleTasklet();

    @Test
    public void testExecute() throws Exception {
        // run the taskletStep, no need for contexts here
        assertEquals(RepeatStatus.FINISHED, tasklet.execute(null, null));
        // assert sysoutput
        assertEquals("Hello World!", newSysOut.toString());
    }

    @Before
    public void setup() {
        // catch and set new system out
        oldSysOut = System.out;
        System.setOut(new PrintStream(newSysOut));
    }

    @After
    public void tearDown() {
        // reset JVM standard
        System.setOut(oldSysOut);
    }
}