gobblin.data.management.copy.converter.UnGzipConverterTest.java Source code

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Here is the source code for gobblin.data.management.copy.converter.UnGzipConverterTest.java

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/*
 * 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 gobblin.data.management.copy.converter;

import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.util.List;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.io.IOUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.testng.Assert;
import org.testng.annotations.DataProvider;
import org.testng.annotations.Test;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;

import joptsimple.internal.Strings;

import gobblin.configuration.WorkUnitState;
import gobblin.converter.DataConversionException;
import gobblin.data.management.copy.CopyableFileUtils;
import gobblin.data.management.copy.FileAwareInputStream;

public class UnGzipConverterTest {

    @DataProvider(name = "fileDataProvider")
    public static Object[][] fileDataProvider() {
        // {filePath, expectedText}
        return new Object[][] { { "unGzipConverterTest/archived.tar.gz", "text" },
                { "unGzipConverterTest/archived.tgz", "text" } };
    }

    @Test(dataProvider = "fileDataProvider")
    public void testGz(final String filePath, final String expectedText) throws Exception {

        UnGzipConverter converter = new UnGzipConverter();

        FileSystem fs = FileSystem.getLocal(new Configuration());

        String fullPath = getClass().getClassLoader().getResource(filePath).getFile();
        FileAwareInputStream fileAwareInputStream = new FileAwareInputStream(
                CopyableFileUtils.getTestCopyableFile(filePath), fs.open(new Path(fullPath)));

        Iterable<FileAwareInputStream> iterable = converter.convertRecord("outputSchema", fileAwareInputStream,
                new WorkUnitState());

        String actual = readGzipStreamAsString(Iterables.getFirst(iterable, null).getInputStream());
        Assert.assertEquals(actual.trim(), expectedText);

    }

    @Test
    public void testExtensionStripping() throws DataConversionException, IOException {
        List<String> helloWorldFiles = ImmutableList.of("helloworld.txt.gzip", "helloworld.txt.gz");
        UnGzipConverter converter = new UnGzipConverter();

        FileSystem fs = FileSystem.getLocal(new Configuration());

        for (String fileName : helloWorldFiles) {
            String filePath = "unGzipConverterTest/" + fileName;
            String fullPath = getClass().getClassLoader().getResource(filePath).getFile();

            FileAwareInputStream fileAwareInputStream = new FileAwareInputStream(
                    CopyableFileUtils.getTestCopyableFile(filePath, "/tmp/" + fileName, null, null),
                    fs.open(new Path(fullPath)));

            Iterable<FileAwareInputStream> iterable = converter.convertRecord("outputSchema", fileAwareInputStream,
                    new WorkUnitState());
            FileAwareInputStream out = iterable.iterator().next();

            Assert.assertEquals(out.getFile().getDestination().getName(), "helloworld.txt");
            String contents = IOUtils.toString(out.getInputStream(), StandardCharsets.UTF_8);

            Assert.assertEquals(contents, "helloworld\n");
        }

    }

    private static String readGzipStreamAsString(InputStream is) throws Exception {
        TarArchiveInputStream tarIn = new TarArchiveInputStream(is);
        try {
            TarArchiveEntry tarEntry;
            while ((tarEntry = tarIn.getNextTarEntry()) != null) {
                if (tarEntry.isFile() && tarEntry.getName().endsWith(".txt")) {
                    return IOUtils.toString(tarIn, "UTF-8");
                }
            }
        } finally {
            tarIn.close();
        }

        return Strings.EMPTY;
    }
}