def test_simAbility(self):
cat_test = CatTest()
cat_test.name = "short"
cat_test.max_items = 10
cat_test.save()
user = User.objects.create_user('john', '*****@*****.**', 'johnpassword')
user.save()
domain = Domain()
domain.name = "Number"
domain.create_date = datetime.datetime(2012,03,06)
domain.save()
item_bank = ItemBank()
item_bank.name = "Fractions"
item_bank.topic = "Addition"
item_bank.domain = domain
item_bank.question_type = QuestionType.objects.get(pk=1)
item_bank.template = ItemBankTemplate.objects.get(pk=1)
item_bank.save()
user_item_bank = UserItemBank()
user_item_bank.user = user
user_item_bank.item_bank = item_bank
user_item_bank.save()
grd = Grade.objects.get(name="A")
thresh = Threshold()
thresh.grade = grd
thresh.item_bank = item_bank
thresh.ability = -1
thresh.save()
user_item_bank.probabilities()
probs = UserItemBankProbabilities.objects.filter(user_item_bank=user_item_bank)
self.assertEquals(len(probs),1)
ibq = ItemBankQuestion()
ibq.item_bank = item_bank
ibq.save()
user_cat_test = UserCatTest()
user_cat_test.user = user
user_cat_test.item_bank = item_bank
user_cat_test.cat_test = cat_test
user_cat_test.save()
#Make three questions
for i in range(1,4):
ibq = ItemBankQuestion()
ibq.item_bank = item_bank
ibq.save()
#Find first question
user_cat_test.nextQuestion()
user_cat_test.simAbility()
self.assertEquals(round(user_cat_test.ability,3),-0.337)
self.assertEquals(round(user_cat_test.stand_dev,3),0.885)
probs = UserItemBankProbabilities.objects.filter(user_item_bank=user_item_bank)[0]
self.assertEquals(round(probs.probability,0),77.0)
user_cat_test.nextQuestion()
user_cat_test.simAbility()
self.assertEquals(round(user_cat_test.ability,3),-0.813)
self.assertEquals(round(user_cat_test.stand_dev,3),0.829)
