data.TarExtractorTest.java Source code

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Here is the source code for data.TarExtractorTest.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 data;

import com.comcast.cdn.traffic_control.traffic_router.neustar.data.TarExtractor;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.LogManager;
import org.apache.log4j.PatternLayout;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

import java.io.File;
import java.io.FileFilter;
import java.io.FileOutputStream;
import java.io.InputStream;

import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.mockito.Matchers.any;
import static org.mockito.Matchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyNoMoreInteractions;
import static org.mockito.Mockito.verifyZeroInteractions;
import static org.mockito.Mockito.when;
import static org.powermock.api.mockito.PowerMockito.spy;
import static org.powermock.api.mockito.PowerMockito.whenNew;

@RunWith(PowerMockRunner.class)
@PrepareForTest({ TarExtractor.class, File.class, TarArchiveInputStream.class })
public class TarExtractorTest {

    @Before
    public void before() {
        LogManager.getRootLogger().addAppender(new ConsoleAppender(new PatternLayout("%d %-5p [%c]: %m%n")));
    }

    @Test
    public void itExtractsTarFile() throws Exception {
        TarArchiveInputStream tarArchiveInputStream = mock(TarArchiveInputStream.class);
        whenNew(TarArchiveInputStream.class).withArguments(any(InputStream.class))
                .thenReturn(tarArchiveInputStream);

        when(tarArchiveInputStream.getNextTarEntry()).thenAnswer(new Answer() {
            private int count = 0;

            public Object answer(InvocationOnMock invocationOnMock) {
                count++;
                if (count == 1) {
                    TarArchiveEntry tarArchiveEntry = mock(TarArchiveEntry.class);
                    when(tarArchiveEntry.getName()).thenReturn("data.gpdb");
                    when(tarArchiveEntry.isFile()).thenReturn(true);
                    return tarArchiveEntry;
                }

                if (count == 2) {
                    TarArchiveEntry tarArchiveEntry = mock(TarArchiveEntry.class);
                    when(tarArchiveEntry.getName()).thenReturn("IpV6Data");
                    when(tarArchiveEntry.isDirectory()).thenReturn(true);
                    return tarArchiveEntry;
                }

                return null;
            }
        });

        File directory = mock(File.class);

        File fileInTar = spy(mock(File.class));
        when(fileInTar.createNewFile()).thenReturn(true);
        whenNew(File.class).withArguments(directory, "data.gpdb").thenReturn(fileInTar);

        File directoryInTar = spy(mock(File.class));
        when(directoryInTar.createNewFile()).thenReturn(true);
        whenNew(File.class).withArguments(directory, "IpV6Data").thenReturn(directoryInTar);

        FileOutputStream fileOutputStream = mock(FileOutputStream.class);
        whenNew(FileOutputStream.class).withArguments(fileInTar).thenReturn(fileOutputStream);

        when(tarArchiveInputStream.read(any(byte[].class))).thenAnswer(new Answer() {
            private int count = 0;

            public Object answer(InvocationOnMock invocationOnMock) {
                count++;

                return (count == 1) ? new Integer(654321) : new Integer(-1);
            }
        });

        InputStream inputStream1 = mock(InputStream.class);
        TarExtractor tarExtractor = new TarExtractor();
        assertThat(tarExtractor.extractTo(directory, inputStream1), equalTo(true));

        verify(fileInTar).createNewFile();
        verify(fileOutputStream).write(any(byte[].class), eq(0), eq(654321));
        verify(fileOutputStream).close();
        verifyNoMoreInteractions(fileOutputStream);

        verifyZeroInteractions(directoryInTar);
    }

    class SimpleFilenameFilter implements FileFilter {
        String name;

        @Override
        public boolean accept(File pathname) {
            return this.name.equals(pathname.getName());
        }
    }
}