core/src/test/java/org/apache/oozie/util/TestBlockingWritesExitValueProcess.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.oozie.util;

import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import org.junit.Test;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertEquals;

public class TestBlockingWritesExitValueProcess {
    private static final String TEST_STRING = "test string";
    @Rule
    public final ExpectedException expectedException = ExpectedException.none();

    @Test
    public void testNonBlockingProcess() {
        final BlockingWritesExitValueProcess process = BlockingWritesExitValueProcess.createFastWritingProcess("", "");
        assertEquals("Invalid exit value", BlockingWritesExitValueProcess.EXIT_VALUE, process.exitValue());
        assertTrue("Invalid input stream class", process.getInputStream() instanceof BlockingInputStream);
        assertTrue("Invalid error stream class", process.getErrorStream() instanceof BlockingInputStream);
    }

    @Test
    public void testBlockingInputStreamProcess() {
        final BlockingWritesExitValueProcess process = BlockingWritesExitValueProcess.createBufferLimitedProcess(TEST_STRING,
                "", 1);
        expectedException.expect(IllegalThreadStateException.class);
        process.exitValue();
    }

    @Test
    public void testBlockingErrorStreamProcess() {
        final BlockingWritesExitValueProcess process = BlockingWritesExitValueProcess.createBufferLimitedProcess("",
                TEST_STRING, 1);
        expectedException.expect(IllegalThreadStateException.class);
        process.exitValue();
    }

    @Test
    public void testFailure() {
        final BlockingWritesExitValueProcess process = BlockingWritesExitValueProcess.createFastWritingProcess("", "");
        assertEquals("Invalid exit value", BlockingWritesExitValueProcess.EXIT_VALUE, process.exitValue());
        process.simulateFailure();
        expectedException.expect(IllegalThreadStateException.class);
        process.exitValue();
    }

}