@Test
public void testDirectory() throws Exception {
final IOFileFilter filter = new DirectoryFileFilter();
assertFiltering(filter, new File("src/"), true);
assertFiltering(filter, new File("src/main/java/"), true);
assertFiltering(filter, new File("pom.xml"), false);
assertFiltering(filter, new File("imaginary"), false);
assertFiltering(filter, new File("imaginary/"), false);
assertFiltering(filter, new File("LICENSE.txt"), false);
assertSame(DirectoryFileFilter.DIRECTORY, DirectoryFileFilter.INSTANCE);
}