Django fields testing (#153)

* Django field testing

This commit adds test for different django fields and
some of their parameters.

This commit also adds model-bakery as a requirement which
is used to create mock objects of model classes and facilitates
testing.

work towards vitessio/vitess#7905

Signed-off-by: Abhay Katheria <[email protected]>

* Added deps for pillow in docker file

* Added separate run statement for deps required by pillow which needs to be persistent and updated the url for django fields guide

frameworks/python/django/Dockerfile

@@ -3,6 +3,7 @@ FROM python:3.9-alpine3.12
 RUN apk add --no-cache mariadb-connector-c
 
 ADD src/requirements.txt /src/requirements.txt
+RUN apk add --no-cache zlib-dev jpeg-dev musl-dev
 RUN \
 	apk add --no-cache --virtual .build-deps gcc libc-dev mariadb-dev && \
 	pip install --no-cache-dir -r /src/requirements.txt && \
@@ -11,4 +12,3 @@ RUN \
 ADD src /src
 WORKDIR /src
 ENTRYPOINT ["sh", "-c", "python manage.py makemigrations && python manage.py migrate && python manage.py test -v 2"]
-

frameworks/python/django/src/requirements.txt

@@ -3,3 +3,5 @@ Django==3.1.4
 mysqlclient==2.0.1
 pytz==2020.4
 sqlparse==0.4.1
+model-bakery==1.3.1
+pillow

frameworks/python/django/src/testApp/models.py

@@ -5,4 +5,48 @@ class Person(models.Model):
     last_name = models.CharField(max_length=100)
 
     def __str__(self):
-        return self.first_name
+        return self.first_name
+
+
+class Event(models.Model):
+    id = models.BigAutoField(primary_key=True)
+
+    title = models.CharField(max_length=150)
+    start_date = models.DateField()
+    start_date_time = models.DateTimeField()
+    duration = models.DurationField()
+    organiser_email = models.EmailField()
+    banner = models.ImageField()
+    slug = models.SlugField()
+    no_of_attendees = models.IntegerField()
+    no_of_views = models.BigIntegerField()
+    website = models.URLField(null=True)
+    start_time = models.TimeField()
+    summary = models.TextField()
+    brochure = models.FileField()
+    rating = models.FloatField(blank=True, default="5.0")
+    is_accepting_registration = models.BooleanField()
+    SHIRT_SIZES = (
+        ("S", "Small"),
+        ("M", "Medium"),
+        ("L", "Large"),
+    )
+    t_size = models.CharField(max_length=20, choices=SHIRT_SIZES)
+
+    def __str__(self):
+        return self.title
+
+
+class Server(models.Model):
+    uuid = models.UUIDField()
+    ip = models.GenericIPAddressField()
+    memory_in_mb = models.PositiveBigIntegerField()
+    no_of_cores = models.PositiveSmallIntegerField()
+    freq_in_ghz = models.SmallIntegerField()
+    no_of_threads = models.PositiveIntegerField()
+    binary_sig = models.BinaryField()
+    cache_size = models.DecimalField(max_digits=25, decimal_places=10)
+    name = models.CharField(max_length=100)
+
+    def __str__(self):
+        return self.name

frameworks/python/django/src/testApp/test/test_fields/test_fields.py

@@ -0,0 +1,124 @@
+#  Django's guide on Model layer fields
+#  https://docs.djangoproject.com/en/3.2/topics/db/models/#fields
+
+from django.test import TestCase
+from testApp.models import Person, Event, Server
+from django.core.files.uploadedfile import SimpleUploadedFile
+from pprint import pprint
+from model_bakery import baker
+from datetime import datetime, timedelta, time
+from uuid import UUID
+from decimal import Decimal
+
+
+class FieldsTestCase(TestCase):
+    @classmethod
+    def setUpTestData(cls):
+        small_gif = (
+            b"\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x00\x00\x00\x21\xf9\x04"
+            b"\x01\x0a\x00\x01\x00\x2c\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02"
+            b"\x02\x4c\x01\x00\x3b"
+        )
+        cls.test_image = SimpleUploadedFile(
+            "small.gif", small_gif, content_type="image/gif"
+        )
+        cls.test_event = baker.make("testApp.Event", title="TEST EVENT")
+        cls.test_server = baker.make("testApp.Server", name="TEST SERVER")
+
+    def test_event_model(self):
+        event_1 = Event.objects.get(title="TEST EVENT")
+
+        # testing big auto field as a primary key
+        self.assertEqual(event_1.id, 1)
+
+        # testing website field with default null value
+        self.assertIsNone(event_1.website)
+
+        # testing fields with choices
+        self.assertIn(event_1.t_size, ("S", "M", "L"))
+        event_1.brochure = self.test_image
+        print(event_1.id)
+
+        # testing float field with blank = true and a set default value
+        self.assertIsNotNone(event_1.rating)
+        self.assertEquals(event_1.rating, 5.0)
+        self.assertIsInstance(event_1.rating, float)
+
+        # testing date and datetime fields
+        self.assertEqual(event_1.start_date_time.date(), datetime.today().date())
+        self.assertEqual(event_1.start_date, datetime.today().date())
+
+        # testing duration field
+        self.assertIsNotNone(event_1.duration)
+        self.assertIsInstance(event_1.duration, timedelta)
+
+        # testing email field
+        self.assertIsNotNone(event_1.organiser_email)
+        self.assertIsInstance(event_1.organiser_email, str)
+
+        # testing slug field
+        self.assertIsNotNone(event_1.slug)
+        self.assertIsInstance(event_1.slug, str)
+
+        # testing big integer field
+        self.assertIsNotNone(event_1.no_of_views)
+        self.assertIsInstance(event_1.no_of_views, int)
+
+        # testing integer field
+        self.assertIsNotNone(event_1.no_of_attendees)
+        self.assertIsInstance(event_1.no_of_attendees, int)
+
+        # testing time field
+        self.assertIsNotNone(event_1.start_time)
+        self.assertIsInstance(event_1.start_time, time)
+
+        # testing text field
+        self.assertIsNotNone(event_1.summary)
+        self.assertIsInstance(event_1.summary, str)
+
+        # testing boolean field
+        self.assertIsNotNone(event_1.is_accepting_registration)
+        self.assertIsInstance(event_1.is_accepting_registration, bool)
+
+        # testing image field
+        event_1.banner = self.test_image
+        self.assertIsNotNone(event_1.banner)
+
+        # testing file field
+        event_1.brochure = self.test_image
+        self.assertIsNotNone(event_1.brochure)
+
+    def test_server_model(self):
+        test_server = Server.objects.get(name="TEST SERVER")
+
+        # testing UUID Fields
+        self.assertIsNotNone(test_server.uuid)
+        self.assertIsInstance(test_server.uuid, UUID)
+
+        # testing generic ip field
+        self.assertIsNotNone(test_server.ip)
+        self.assertIsInstance(test_server.ip, str)
+
+        # testing positive big integer field
+        self.assertIsNotNone(test_server.memory_in_mb)
+        self.assertIsInstance(test_server.memory_in_mb, int)
+
+        # testing positive small integer field
+        self.assertIsNotNone(test_server.no_of_cores)
+        self.assertIsInstance(test_server.no_of_cores, int)
+
+        # testing small integer field
+        self.assertIsNotNone(test_server.freq_in_ghz)
+        self.assertIsInstance(test_server.freq_in_ghz, int)
+
+        # testing positive integer field
+        self.assertIsNotNone(test_server.no_of_threads)
+        self.assertIsInstance(test_server.no_of_threads, int)
+
+        # testing binary field
+        self.assertIsNotNone(test_server.binary_sig)
+        self.assertIsInstance(test_server.binary_sig, bytes)
+
+        # testing decimal field
+        self.assertIsNotNone(test_server.cache_size)
+        self.assertIsInstance(test_server.cache_size, Decimal)