com.logsniffer.model.support.LineInputStreamTest.java Source code

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Here is the source code for com.logsniffer.model.support.LineInputStreamTest.java

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/*******************************************************************************
 * logsniffer, open source tool for viewing, monitoring and analysing log data.
 * Copyright (c) 2015 Scaleborn UG, www.scaleborn.com
 *
 * logsniffer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * logsniffer is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package com.logsniffer.model.support;

import java.io.File;
import java.io.IOException;

import junit.framework.Assert;

import org.apache.commons.io.FileUtils;
import org.junit.Test;

import com.logsniffer.model.LogPointer;
import com.logsniffer.model.file.DirectFileLogAccess;
import com.logsniffer.model.file.FileLog;

/**
 * Test for {@link LineInputStream}.
 * 
 * @author mbok
 * 
 */
public class LineInputStreamTest {

    @Test
    public void testDefaultNL() throws IOException {
        FileLog flog = new FileLog(writeString2Tmp("line1\nline2", "UTF-8"));
        DirectFileLogAccess logAccess = new DirectFileLogAccess(flog);
        LineInputStream log = new LineInputStream(logAccess, logAccess.getInputStream(null), "UTF-8");
        LogPointer start = log.getPointer();
        Assert.assertEquals("line1", log.readNextLine());
        Assert.assertEquals("line1\n".length(), logAccess.getDifference(start, log.getPointer()));
        Assert.assertEquals(false, log.getPointer().isEOF());
        Assert.assertEquals("line2", log.readNextLine());
        log.close();

        log = new LineInputStream(logAccess,
                logAccess.getInputStream(logAccess.createRelative(null, "line1\n".length())), "UTF-8");
        Assert.assertEquals("line2", log.readNextLine());
        Assert.assertNull(log.readNextLine());
        Assert.assertEquals(true, log.getPointer().isEOF());
        log.close();
    }

    @Test
    public void testWindowsNL() throws IOException {
        FileLog flog = new FileLog(writeString2Tmp("line1\r\nline2", "UTF-8"));
        DirectFileLogAccess logAccess = new DirectFileLogAccess(flog);
        LineInputStream log = new LineInputStream(logAccess, logAccess.getInputStream(null), "UTF-8");
        LogPointer start = log.getPointer();
        Assert.assertEquals("line1", log.readNextLine());
        Assert.assertEquals("line1\r\n".getBytes("UTF-8").length,
                logAccess.getDifference(start, log.getPointer()));
        Assert.assertEquals(false, log.getPointer().isEOF());
        Assert.assertEquals("line2", log.readNextLine());
        log.close();

        log = new LineInputStream(logAccess,
                logAccess.getInputStream(logAccess.createRelative(null, "line1\r\n".getBytes("UTF-8").length)),
                "UTF-8");
        Assert.assertEquals("line2", log.readNextLine());
        Assert.assertNull(log.readNextLine());
        Assert.assertEquals(true, log.getPointer().isEOF());
        log.close();

    }

    @Test
    public void testNLTrimingDuringBufferLimit() throws IOException {
        FileLog flog = new FileLog(new File("src/test/resources/logs/nl-triming.txt"));
        DirectFileLogAccess logAccess = new DirectFileLogAccess(flog);
        LineInputStream log = new LineInputStream(logAccess, logAccess.getInputStream(null), "UTF-8");
        String line;
        int i = 0;
        while ((line = log.readNextLine()) != null) {
            i++;
            Assert.assertFalse(line.matches("[\n\r]+$"));
        }
        log.close();
        Assert.assertEquals(53, i);
    }

    /*
     * @Test public void testReadingAfterEnd() throws IOException { FileLog log
     * = new FileLog(writeString2Tmp("line1", "UTF-8"), "UTF-8");
     * ArrayList<String> lines = new ArrayList<String>(); // No new lines
     * Assert.assertEquals(log.getSize(), log.readLines(log.getSize(), lines,
     * 1)); Assert.assertEquals(0, lines.size()); }
     */
    public static File writeString2Tmp(final String text, final String charset) throws IOException {
        File tmp = File.createTempFile("test", "txt");
        tmp.deleteOnExit();
        FileUtils.writeStringToFile(tmp, text, charset);
        return tmp;
    }
}