com.adaptris.util.stream.StreamUtilTest.java Source code

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Here is the source code for com.adaptris.util.stream.StreamUtilTest.java

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/*
 * Copyright 2015 Adaptris Ltd.
 * 
 * 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 com.adaptris.util.stream;

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

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class StreamUtilTest extends StreamUtil {

    private static final String TEXT = "The Quick Brown fox jumps over the lazy dog.";

    private transient Log logR;

    @Before
    public void setUp() throws Exception {
        logR = LogFactory.getLog(this.getClass());
    }

    @After
    public void tearDown() throws Exception {
    }

    @Test
    public void testCreateFile() throws Exception {
        int bytes = TEXT.length();
        ByteArrayInputStream in = new ByteArrayInputStream(TEXT.getBytes());
        File f = StreamUtil.createFile(in, bytes);
        assertNotNull(f);
        assertEquals(TEXT, new String(read(f)));
        FileUtils.deleteQuietly(f);
    }

    @Test
    public void testCreateFileInDirectory() throws Exception {
        int bytes = TEXT.length();
        ByteArrayInputStream in = new ByteArrayInputStream(TEXT.getBytes());
        File f = StreamUtil.createFile(in, bytes, System.getProperty("java.io.tmpdir"));
        assertNotNull(f);
        assertEquals(TEXT, new String(read(f)));
        FileUtils.deleteQuietly(f);
    }

    @Test
    public void testCreateFileInDirectory2() throws Exception {
        int bytes = TEXT.length();
        ByteArrayInputStream in = new ByteArrayInputStream(TEXT.getBytes());
        File f = StreamUtil.createFile(in, bytes, "");
        assertNotNull(f);
        assertEquals(TEXT, new String(read(f)));
        FileUtils.deleteQuietly(f);
    }

    @Test
    public void testCopyStreamNullInputs() throws Exception {
        StreamUtil.copyStream(null, null);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        StreamUtil.copyStream(null, out);
        assertEquals(0, out.toByteArray().length);
        StreamUtil.copyStream(new ByteArrayInputStream(TEXT.getBytes()), null);
        StreamUtil.copyStream(null, null, -1);
        StreamUtil.copyStream(null, null, 10);
        StreamUtil.copyStream(null, new ByteArrayOutputStream(), 10);
        StreamUtil.copyStream(new ByteArrayInputStream(TEXT.getBytes()), null, 10);
        StreamUtil.copyStream(new ByteArrayInputStream(TEXT.getBytes()), new ByteArrayOutputStream(), -1);
    }

    @Test
    public void testCopyStreamWithLength() throws Exception {
        int bytes = TEXT.length();
        ByteArrayInputStream in = new ByteArrayInputStream(TEXT.getBytes());
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        StreamUtil.copyStream(in, out, bytes);
        assertEquals(TEXT, out.toString());
    }

    @Test
    public void testCopyStreamNoLength() throws Exception {
        ByteArrayInputStream in = new ByteArrayInputStream(TEXT.getBytes());
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        StreamUtil.copyStream(in, out);
        assertEquals(TEXT, out.toString());
    }

    @Test
    public void testMakeCopy() throws Exception {
        ByteArrayInputStream in = new ByteArrayInputStream(TEXT.getBytes());
        InputStream in2 = StreamUtil.makeCopy(in);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        IOUtils.copy(in2, out);
        assertEquals(TEXT, out.toString());
    }

    @Test(expected = IOException.class)
    public void testCopyAndCloseStreams() throws Exception {
        int bytes = TEXT.length();
        ByteArrayInputStream in = new ByteArrayInputStream(TEXT.getBytes());
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        StreamUtil.copyAndClose(in, out);
        assertEquals(TEXT, out.toString());
        StreamUtil.copyAndClose(new ErroringInputStream(), new ByteArrayOutputStream());
    }

    @Test(expected = IOException.class)
    public void testCopyAndCloseWriter() throws Exception {
        int bytes = TEXT.length();
        ByteArrayInputStream in = new ByteArrayInputStream(TEXT.getBytes());
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        OutputStreamWriter writer = new OutputStreamWriter(out);
        StreamUtil.copyAndClose(in, writer);
        assertEquals(TEXT, out.toString());
        StreamUtil.copyAndClose(new ErroringInputStream(), new OutputStreamWriter(new ByteArrayOutputStream()));

    }

    private byte[] read(File f) throws IOException {
        byte[] results;
        try (FileInputStream in = new FileInputStream(f)) {
            return IOUtils.readFully(in, in.available());
        }
    }

    public static class ErroringInputStream extends InputStream {

        public ErroringInputStream() {
        }

        @Override
        public int read() throws IOException {
            throw new IOException("Failed to read");
        }

        @Override
        public int read(byte[] b) throws IOException {
            throw new IOException("Failed to read");
        }

        @Override
        public int read(byte[] b, int off, int len) throws IOException {
            throw new IOException("Failed to read");
        }

    }
}