engine.saveText("TestPage", "foobar");
Attachment att = new Attachment(engine,"TestPage","deceit of the tribbles.txt");
engine.getAttachmentManager().storeAttachment( att, engine.makeAttachmentFile() );
DavItem di = m_provider.getItem( new DavPath("TestPage/deceit of the tribbles.txt") );
assertNotNull( "No di", di );
assertEquals("URL", "http://localhost/attach/TestPage/deceit%20of%20the%20tribbles.txt",
di.getHref() );
}