nk20/apps/wei/tests/test_wei_algorithm_2021.py

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# Copyright (C) 2018-2021 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later
import random
from django.contrib.auth.models import User
from django.test import TestCase
from ..forms.surveys.wei2021 import WEIBusInformation2021, WEISurvey2021, WORDS, WEISurveyInformation2021
from ..models import Bus, WEIClub, WEIRegistration
class TestWEIAlgorithm(TestCase):
"""
Run some tests to ensure that the WEI algorithm is working well.
"""
fixtures = ('initial',)
def setUp(self):
"""
Create some test data, with one WEI and 10 buses with random score attributions.
"""
self.wei = WEIClub.objects.create(
name="WEI 2021",
email="wei2021@example.com",
date_start='2021-09-17',
date_end='2021-09-19',
year=2021,
)
self.buses = []
for i in range(10):
bus = Bus.objects.create(wei=self.wei, name=f"Bus {i}", size=10)
self.buses.append(bus)
information = WEIBusInformation2021(bus)
for word in WORDS:
information.scores[word] = random.randint(0, 101)
information.save()
bus.save()
def test_survey_algorithm_small(self):
"""
There are only a few people in each bus, ensure that each person has its best bus
"""
# Add a few users
for i in range(10):
user = User.objects.create(username=f"user{i}")
registration = WEIRegistration.objects.create(
user=user,
wei=self.wei,
first_year=True,
birth_date='2000-01-01',
)
information = WEISurveyInformation2021(registration)
for j in range(1, 21):
setattr(information, f'word{j}', random.choice(WORDS))
information.step = 20
information.save(registration)
registration.save()
# Run algorithm
WEISurvey2021.get_algorithm_class()().run_algorithm()
# Ensure that everyone has its first choice
for r in WEIRegistration.objects.filter(wei=self.wei).all():
survey = WEISurvey2021(r)
preferred_bus = survey.ordered_buses()[0][0]
chosen_bus = survey.information.get_selected_bus()
self.assertEqual(preferred_bus, chosen_bus)
def test_survey_algorithm_full(self):
"""
Buses are full of first year people, ensure that they are happy
"""
# Add a lot of users
for i in range(95):
user = User.objects.create(username=f"user{i}")
registration = WEIRegistration.objects.create(
user=user,
wei=self.wei,
first_year=True,
birth_date='2000-01-01',
)
information = WEISurveyInformation2021(registration)
for j in range(1, 21):
setattr(information, f'word{j}', random.choice(WORDS))
information.step = 20
information.save(registration)
registration.save()
# Run algorithm
WEISurvey2021.get_algorithm_class()().run_algorithm()
penalty = 0
# Ensure that everyone seems to be happy
# We attribute a penalty for each user that didn't have its first choice
# The penalty is the square of the distance between the score of the preferred bus
# and the score of the attributed bus
# We consider it acceptable if the mean of this distance is lower than 5 %
for r in WEIRegistration.objects.filter(wei=self.wei).all():
survey = WEISurvey2021(r)
chosen_bus = survey.information.get_selected_bus()
buses = survey.ordered_buses()
score = min(v for bus, v in buses if bus == chosen_bus)
max_score = buses[0][1]
penalty += (max_score - score) ** 2
self.assertLessEqual(max_score - score, 25) # Always less than 25 % of tolerance
self.assertLessEqual(penalty / 100, 25) # Tolerance of 5 %