long pathID1 = db.addPath("neuer Pfad 1", -1);
long pathID2 = db.addPath("neuer Pfad 2", -1);
long pathID3 = db.addPath("neuer Pfad 3", pathID2);
db.addDocument(-1, 0, SAMPLE_DOCUMENT_FILE);
db.addDocument(-1, pathID1, SAMPLE_DOCUMENT_FILE);
db.addDocument(-1, pathID2, SAMPLE_DOCUMENT_FILE);
db.addDocument(-1, pathID3, SAMPLE_DOCUMENT_FILE);
assertEquals(2, db.getDocumentsFromPath(0).size());
assertEquals(1, db.getDocumentsFromPath(pathID1).size());
assertEquals(1, db.getDocumentsFromPath(pathID2).size());
assertEquals(1, db.getDocumentsFromPath(pathID3).size());