FileOpenerTest.java

/*
 * Copyright 2013, 2014 Deutsche Nationalbibliothek
 *
 * 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.culturegraph.mf.io;

import static org.junit.Assert.assertEquals;
import static org.junit.Assume.assumeFalse;
import static org.mockito.Mockito.verify;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.Reader;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;

import org.culturegraph.mf.commons.ResourceUtil;
import org.culturegraph.mf.framework.ObjectReceiver;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;
import org.mockito.ArgumentCaptor;
import org.mockito.Captor;
import org.mockito.Mock;
import org.mockito.junit.MockitoJUnit;
import org.mockito.junit.MockitoRule;

/**
 * Tests for class {@link FileOpener}.
 *
 * @author Christoph Böhme
 *
 */
public final class FileOpenerTest {

	private static final String DATA = "Überfacture";

	@Rule
	public MockitoRule mockitoRule = MockitoJUnit.rule();

	@Rule
	public TemporaryFolder tempFolder = new TemporaryFolder();

	@Mock
	private ObjectReceiver<Reader> receiver;

	@Captor
	private ArgumentCaptor<Reader> processedObject;

	@Test
	public void testUtf8IsDefaultEncoding() throws IOException {
		assumeFalse("Default encoding is UTF-8: It is not possible to test whether " +
						"FileOpener sets the encoding to UTF-8 correctly.",
				StandardCharsets.UTF_8.equals(Charset.defaultCharset()));

		final File testFile = createTestFile();

		final FileOpener opener = new FileOpener();
		opener.setReceiver(receiver);
		opener.process(testFile.getAbsolutePath());
		opener.closeStream();

		verify(receiver).process(processedObject.capture());
		assertEquals(DATA, ResourceUtil.readAll(processedObject.getValue()));
	}

	private File createTestFile() throws IOException {
		final File file = tempFolder.newFile();
		try (OutputStream stream = new FileOutputStream(file)) {
			stream.write(DATA.getBytes(StandardCharsets.UTF_8));
		}
		return file;
	}

}