from rdfalchemy import *
from rdfalchemy.samples.doap import *
from rdfalchemy.samples.foaf import *
from rdfalchemy.orm import mapper
from rdflib import ConjunctiveGraph

import logging
log = logging.getLogger('rdfalchemy')
if not log.handlers:
    log.addHandler(logging.StreamHandler())
#log.setLevel(10)


Person.db=ConjunctiveGraph()
Person.knows = rdfMultiple(FOAF.knows, range_type=FOAF.Person)        


def test_start():
    assert len(Person.db) == 0
    p=Person(last="Cooper" , first="Philip")
    assert len(Person.db) == 3

def test_addBNodeKnowsL():
    Person.knows = rdfList(FOAF.knows, range_type=FOAF.Person)        
    mapper()
    p1=Person.get_by(first="Philip")
    p2=Person(last="Cooper" , first="Ben")
    p3=Person(last="Cooper" , first="Matt")
    assert len(Person.db) == 9
    p1.knows = [p2, p3]
    print len(Person.db)
    assert len(Person.db) == 14
    del p1.knows
    print len(Person.db)
    assert len(Person.db) == 3
    
def test_addBNodeKnowsM():
    Person.knows = rdfMultiple(FOAF.knows, range_type=FOAF.Person)        
    p1=Person.get_by(first="Philip")
    p2=Person(last="Cooper" , first="Ben")
    p3=Person(last="Cooper" , first="Matt")
    assert len(Person.db) == 9
    p1.knows = [p2, p3]
    print len(Person.db)
    assert len(Person.db) == 11
    del p1.knows
    print len(Person.db)
    assert len(Person.db) == 3