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package org.scijava.convert;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;

import java.io.File;

import org.junit.Test;
import org.scijava.convert.FileListConverters.FileArrayToStringConverter;
import org.scijava.convert.FileListConverters.FileToStringConverter;
import org.scijava.convert.FileListConverters.StringToFileArrayConverter;
import org.scijava.convert.FileListConverters.StringToFileConverter;

public class FileListConverterTest {

	@Test
	public void testStringToFileConverter() {
		final StringToFileConverter conv = new StringToFileConverter();
		final String path = "C:\\temp\\f,i;l-ename.txt";
		assertTrue("Cannot convert from String to File",
				conv.canConvert(String.class, File.class));
		assertFalse("Can erroneously convert from String to File[]",
				conv.canConvert(String.class, File[].class));
		assertEquals(new File(path),
				conv.convert(path, File.class));
	}

	@Test
	public void testStringToFileArrayConverter() {
		final StringToFileArrayConverter conv = new StringToFileArrayConverter();
		final String path = "\"C:\\temp\\f,i;l-ename.txt\",C:\\temp";
		assertTrue("Cannot convert from String to File[]",
				conv.canConvert(String.class, File[].class));
		assertFalse("Can erroneously convert from String to File",
				conv.canConvert(String.class, File.class));
		assertEquals("Wrong array length", 2,
				conv.convert(path, File[].class).length);
		assertEquals("Wrong file name", new File("C:\\temp\\f,i;l-ename.txt"),
				conv.convert(path, File[].class)[0]);
		assertEquals("Wrong file name", new File("C:\\temp"),
				conv.convert(path, File[].class)[1]);
		assertEquals( 0, conv.convert( "", File[].class ).length );
	}

	@Test
	public void testFileToStringConverter() {
		final FileToStringConverter conv = new FileToStringConverter();
		final File file = new File("C:\\temp\\f,i;l-ename.txt");
		assertTrue("Cannot convert from File to String",
				conv.canConvert(File.class, String.class));
		assertFalse("Can erroneously convert from File[] to String",
				conv.canConvert(File[].class, String.class));
		assertEquals(file.getAbsolutePath(),
				conv.convert(file, String.class));
	}

	@Test
	public void testFileArrayToStringConverter() {
		final FileArrayToStringConverter conv = new FileArrayToStringConverter();
		final File[] fileArray = new File[2];
		fileArray[0] = new File("C:\\temp\\f,i;l-ename.txt");
		fileArray[1] = new File("C:\\temp");
		final String expected = "\"" + fileArray[0].getAbsolutePath() + "\"," + fileArray[1].getAbsolutePath();
		assertTrue("Cannot convert from File[] to String",
				conv.canConvert(File[].class, String.class));
		assertFalse("Can erroneously convert from File to String",
				conv.canConvert(File.class, String.class));
		assertEquals("Wrong output string", expected,
				conv.convert(fileArray, String.class));
	}
}
