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/*
* Copyright © 2016-2018 European Support Limited
*
* 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 org.openecomp.core.utilities.file;
import static org.hamcrest.Matchers.aMapWithSize;
import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.hasSize;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.AbstractMap;
import java.util.Arrays;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.junit.Assert;
import org.junit.Test;
/**
* @author EVITALIY
* @since 24 Oct 17
*/
public class FileContentHandlerTest {
private static final String FILE_NAME = "test-file.txt";
@Test
public void testProcessFileContent() {
final int size = 13;
FileContentHandler contentHandler = new FileContentHandler();
final byte[] content = new byte[size];
Arrays.fill(content, (byte) 44);
contentHandler.addFile(FILE_NAME, content);
byte[] actualContent = processFileContent(FILE_NAME, optional -> {
try {
byte[] buffer = new byte[size];
assertTrue(optional.isPresent());
assertEquals(size, optional.get().read(buffer));
return buffer;
} catch (IOException e) {
throw new RuntimeException("Unexpected error", e);
}
}, contentHandler);
Assert.assertTrue(Arrays.equals(actualContent, content));
}
@Test
public void testProcessEmptyFileContent() {
FileContentHandler contentHandler = new FileContentHandler();
contentHandler.addFile(FILE_NAME, new byte[0]);
assertFalse(processFileContent(FILE_NAME, Optional::isPresent, contentHandler));
}
@Test
public void testProcessNoFileContent() {
FileContentHandler contentHandler = new FileContentHandler();
assertFalse(processFileContent("filename", Optional::isPresent, contentHandler));
}
@Test
public void testAddFiles() {
FileContentHandler contentHandler = new FileContentHandler();
contentHandler.addFile("org/openecomp/core/utilities/file/testFileUtils.txt",
new ByteArrayInputStream(new byte[100]));
Assert.assertNotNull(contentHandler.getFiles());
Assert.assertTrue(contentHandler.getFiles().containsKey("org/openecomp/core/utilities/file/testFileUtils.txt"));
}
@Test
public void testSetFiles() {
//given
final FileContentHandler expectedFileContentHandler = createFileContentHandler();
//when
final FileContentHandler actualContentHandler = new FileContentHandler();
actualContentHandler.setFiles(expectedFileContentHandler.getFiles());
//then
final Map<String, byte[]> actualFileMap = actualContentHandler.getFiles();
assertThat("Should contain the expected number of folders", actualContentHandler.getFolderList(), hasSize(0));
assertThat("Should contain the expected number of files", actualFileMap, aMapWithSize(2));
expectedFileContentHandler.getFiles().keySet().forEach(filePath -> {
assertThat("Should contain the expected file", actualFileMap.keySet(), hasItem(filePath));
});
}
@Test
public void testAddAllFromFileContentHandler() {
//given
final FileContentHandler expectedFileContentHandler = createFileContentHandler();
//when
final FileContentHandler actualContentHandler = new FileContentHandler();
actualContentHandler.addAll(expectedFileContentHandler);
//then
final Map<String, byte[]> actualFileMap = actualContentHandler.getFiles();
assertThat("Should contain the expected number of files", actualFileMap, aMapWithSize(2));
final Set<String> actualFolderList = actualContentHandler.getFolderList();
assertThat("Should contain the expected number of folders", actualFolderList, hasSize(3));
expectedFileContentHandler.getFiles().keySet().forEach(filePath -> {
assertThat("Should contain the expected file", actualFileMap.keySet(), hasItem(filePath));
});
expectedFileContentHandler.getFolderList().forEach(folderPath -> {
assertThat("Should contain the expected file", actualFolderList, hasItem(folderPath));
});
}
private FileContentHandler createFileContentHandler() {
final FileContentHandler contentHandler = new FileContentHandler();
final Map<String, byte[]> fileMap = Stream.of(new AbstractMap.SimpleEntry<>("file1", new byte[0]),
new AbstractMap.SimpleEntry<>("file2", new byte[0]))
.collect(Collectors.toMap(AbstractMap.SimpleEntry::getKey, AbstractMap.SimpleEntry::getValue));
contentHandler.setFiles(fileMap);
contentHandler.addFolder("folder1");
contentHandler.addFolder("folder1/folder2");
contentHandler.addFolder("folder3");
return contentHandler;
}
/**
* Applies a business logic to a file's content while taking care of all retrieval logic.
*
* @param fileName name of a file inside this content handler.
* @param processor the business logic to work on the file's input stream, which may not be set
* (check the {@link Optional} if no such file can be found
* @param <T> return type, may be {@link java.lang.Void}
* @return result produced by the processor
*/
public <T> T processFileContent(String fileName, Function<Optional<InputStream>, T> processor, FileContentHandler contentHandler) {
// do not throw IOException to mimic the existing uses of getFileContent()
try (InputStream contentInputStream = contentHandler.getFileContentAsStream(fileName)) {
return processor.apply(Optional.ofNullable(contentInputStream));
} catch (IOException e) {
throw new RuntimeException("Failed to process file: " + fileName, e);
}
}
}
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