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from django.core.exceptions import ValidationError
from django.db import models
from django.test import TestCase
from .models import DataModel
class BinaryFieldTests(TestCase):
binary_data = b"\x00\x46\xFE"
def test_set_and_retrieve(self):
data_set = (
self.binary_data,
bytearray(self.binary_data),
memoryview(self.binary_data),
)
for bdata in data_set:
with self.subTest(data=repr(bdata)):
dm = DataModel(data=bdata)
dm.save()
dm = DataModel.objects.get(pk=dm.pk)
self.assertEqual(bytes(dm.data), bytes(bdata))
# Resave (=update)
dm.save()
dm = DataModel.objects.get(pk=dm.pk)
self.assertEqual(bytes(dm.data), bytes(bdata))
# Test default value
self.assertEqual(bytes(dm.short_data), b"\x08")
def test_max_length(self):
dm = DataModel(short_data=self.binary_data * 4)
with self.assertRaises(ValidationError):
dm.full_clean()
def test_editable(self):
field = models.BinaryField()
self.assertIs(field.editable, False)
field = models.BinaryField(editable=True)
self.assertIs(field.editable, True)
field = models.BinaryField(editable=False)
self.assertIs(field.editable, False)
def test_filter(self):
dm = DataModel.objects.create(data=self.binary_data)
DataModel.objects.create(data=b"\xef\xbb\xbf")
self.assertSequenceEqual(DataModel.objects.filter(data=self.binary_data), [dm])
def test_filter_bytearray(self):
dm = DataModel.objects.create(data=self.binary_data)
DataModel.objects.create(data=b"\xef\xbb\xbf")
self.assertSequenceEqual(
DataModel.objects.filter(data=bytearray(self.binary_data)), [dm]
)
def test_filter_memoryview(self):
dm = DataModel.objects.create(data=self.binary_data)
DataModel.objects.create(data=b"\xef\xbb\xbf")
self.assertSequenceEqual(
DataModel.objects.filter(data=memoryview(self.binary_data)), [dm]
)
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