Ticket #15009: tests.py

from django.db import models
from django.test import TestCase
from wrong_or.wrong.models import BaseModel, First, Second, Third

class SimpleTest(TestCase):
    def test_wrong(self):
        
        bo = BaseModel.objects.create()
        
        f = First.objects.create(condition=True)
        bo.firsts.add(f)
        
        s1 = Second.objects.create()
        t1 = Third.objects.create(second=s1, condition=False)
        s2 = Second.objects.create()
        t2 = Third.objects.create(second=s2, condition=False)
        
        bo.seconds.add(s1, s2)
        
        q1 = models.Q(firsts__condition=True) # match the only BaseModel
        q2 = models.Q(seconds__thirds__condition=True) # match nothing
        
        self.assertTrue(BaseModel.objects.filter(q1).exists())
        self.assertEqual(1, BaseModel.objects.filter(q1).count())
        self.assertFalse(BaseModel.objects.filter(q2).exists())
        
        # A filter should not duplicate records.
        # This assertion will fail, because there are two copies of 
        # the 'bo' record.
        self.assertEqual(1, BaseModel.objects.filter(q1|q2).count())