from datetime import datetime

from django.test import TestCase
from django.utils import timezone

from .models import Category, Gauge, Mesure

class TestCategoryModel(TestCase):

    def test_str(self):
        cat = Category(name='test')

        self.assertEqual('test', str(cat))

class TestGaugeModel(TestCase):

    def test_str(self):
        cat = Category.objects.create(name='eau')
        gauge = Gauge.objects.create(serial_number='test', category=cat)

        self.assertEqual('eau (test)', str(gauge))
    
    def test_default_ordering(self):
        cat_water = Category.objects.create(name='eau')
        cat_gaz = Category.objects.create(name='gaz')

        gauge_1 = Gauge.objects.create(serial_number='undefined', category=cat_water)
        gauge_2 = Gauge.objects.create(serial_number='undefined', category=cat_gaz)
        gauge_3 = Gauge.objects.create(serial_number='undefined', category=cat_gaz)
        gauge_4 = Gauge.objects.create(serial_number='undefined', category=cat_water)

        gauges_list = Gauge.objects.all()

        self.assertEqual(gauge_1, gauges_list[0])
        self.assertEqual(gauge_4, gauges_list[1])
        self.assertEqual(gauge_2, gauges_list[2])
        self.assertEqual(gauge_3, gauges_list[3])
    
    def test_category_property(self):
        cat = Category.objects.create(name='eau')
        gauge = Gauge.objects.create(serial_number='undefined', category=cat)
        mesure = Mesure.objects.create(moment=timezone.make_aware(datetime.now()), value=0.001, gauge=gauge)

        self.assertEqual(cat, mesure.category)