MIMEDectectionExtensiveTest.java

package de.uni_siegen.wineme.come_in.thumbnailer.test.slow;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;

import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;

import de.uni_siegen.wineme.come_in.thumbnailer.test.TestConfiguration;
import de.uni_siegen.wineme.come_in.thumbnailer.util.mime.MimeTypeDetector;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized.Parameters;

import uk.ac.lkl.common.util.testing.LabelledParameterized;
import static org.junit.Assert.*;

// Foreach Filename in TestFileDirectory : combine extensions.
@RunWith(LabelledParameterized.class)
// Strange as it sounds, these tests only run inside Eclipse. In Ant, the @RunWith-Annotation seems to go ignored. I'd really like to know why!
public class MIMEDectectionExtensiveTest implements TestConfiguration
{
	private MimeTypeDetector mimeType;
	private File file;
	private String expectedMime;

	public MIMEDectectionExtensiveTest(String name, String expectedMime, File file)
	{
		this.file = file;
		this.expectedMime = expectedMime;
	}
	
	@Before
	public void setUp() throws Exception
	{
		mimeType = new MimeTypeDetector();
	}
	
	@Test
	public void testMime()
	{
		String mime = mimeType.getMimeType(file);
		if (!expectedMime.equalsIgnoreCase(mime))
			fail("File " + file.getName() + ": Mime is not equal: expected \"" + expectedMime + "\", but was \"" + mime + "\".");
	}
	
	@Parameters
	public static Collection<Object[]> suite() throws Exception
	{
		MimeTypeDetector mimeType = new MimeTypeDetector();
		
		File path = new File (TESTFILES_DIR);
		File tmpDir = File.createTempFile("test-mime-detection", "");
		File[] testfiles = path.listFiles();

		tmpDir.delete();
		tmpDir.mkdirs();
		
		ArrayList<String> extensions = new ArrayList<String>(testfiles.length);
		for(File input : testfiles)
		{
			if (input.isDirectory() || input.isHidden())
				continue;
			
			extensions.add(FilenameUtils.getExtension(input.getName()));
		}
		extensions.add("");
		
		Collection<Object[]> param = new ArrayList<Object[]>();
		for (File input : testfiles)
		{
			if (input.isDirectory() || input.isHidden())
				continue;
			
			String myName       = FilenameUtils.getBaseName(input.getName());
			String myExt  	    = FilenameUtils.getExtension(input.getName());
			final String myMime	= mimeType.getMimeType(input);
			
			for (String otherExt : extensions)
			{
				String newFilename = tmpDir.getAbsolutePath() + File.separator + myName + "-" + myExt;
				if (!otherExt.isEmpty())
					newFilename += "." + otherExt;
				
				File output = new File(newFilename);
				try {
					FileUtils.copyFile(input, output);
					
					param.add(new Object[]{ "test_mime_" + myExt + "_" + otherExt, myMime, output});
				} catch (IOException e) {
					System.err.println("Warning: Filename " + output.getName() + " is could not be written.");
				}
			}
		}
		
		return param;
	}
}