@Test
public void testGetPathString()
{

    assertThat( PathUtil.pathString( null ), nullValue() );
    assertThat( PathUtil.pathString( new File[] { f1 } ), equalTo( _PATH ) );
    assertThat( PathUtil.pathString( new File[] { f1, f2 } ), equalTo( _PATH + File.pathSeparatorChar
        + ABSOLUTE_PATH ) );
}