import unittest from django.core import validators from django.core.exceptions import ValidationError from django.db import IntegrityError, connection, models from django.test import SimpleTestCase, TestCase from .models import ( BigIntegerModel, IntegerModel, PositiveIntegerModel, PositiveSmallIntegerModel, SmallIntegerModel, ) class IntegerFieldTests(TestCase): model = IntegerModel documented_range = (-2147483648, 2147483647) @property def backend_range(self): field = self.model._meta.get_field('value') internal_type = field.get_internal_type() return connection.ops.integer_field_range(internal_type) def test_documented_range(self): """ Values within the documented safe range pass validation, and can be saved and retrieved without corruption. """ min_value, max_value = self.documented_range instance = self.model(value=min_value) instance.full_clean() instance.save() qs = self.model.objects.filter(value__lte=min_value) self.assertEqual(qs.count(), 1) self.assertEqual(qs[0].value, min_value) instance = self.model(value=max_value) instance.full_clean() instance.save() qs = self.model.objects.filter(value__gte=max_value) self.assertEqual(qs.count(), 1) self.assertEqual(qs[0].value, max_value) def test_backend_range_save(self): """ Backend specific ranges can be saved without corruption. """ min_value, max_value = self.backend_range if min_value is not None: instance = self.model(value=min_value) instance.full_clean() instance.save() qs = self.model.objects.filter(value__lte=min_value) self.assertEqual(qs.count(), 1) self.assertEqual(qs[0].value, min_value) if max_value is not None: instance = self.model(value=max_value) instance.full_clean() instance.save() qs = self.model.objects.filter(value__gte=max_value) self.assertEqual(qs.count(), 1) self.assertEqual(qs[0].value, max_value) def test_backend_range_validation(self): """ Backend specific ranges are enforced at the model validation level (#12030). """ min_value, max_value = self.backend_range if min_value is not None: instance = self.model(value=min_value - 1) expected_message = validators.MinValueValidator.message % { 'limit_value': min_value, } with self.assertRaisesMessage(ValidationError, expected_message): instance.full_clean() instance.value = min_value instance.full_clean() if max_value is not None: instance = self.model(value=max_value + 1) expected_message = validators.MaxValueValidator.message % { 'limit_value': max_value, } with self.assertRaisesMessage(ValidationError, expected_message): instance.full_clean() instance.value = max_value instance.full_clean() def test_redundant_backend_range_validators(self): """ If there are stricter validators than the ones from the database backend then the backend validators aren't added. """ min_backend_value, max_backend_value = self.backend_range for callable_limit in (True, False): with self.subTest(callable_limit=callable_limit): if min_backend_value is not None: min_custom_value = min_backend_value + 1 limit_value = (lambda: min_custom_value) if callable_limit else min_custom_value ranged_value_field = self.model._meta.get_field('value').__class__( validators=[validators.MinValueValidator(limit_value)] ) field_range_message = validators.MinValueValidator.message % { 'limit_value': min_custom_value, } with self.assertRaisesMessage(ValidationError, '[%r]' % field_range_message): ranged_value_field.run_validators(min_backend_value - 1) if max_backend_value is not None: max_custom_value = max_backend_value - 1 limit_value = (lambda: max_custom_value) if callable_limit else max_custom_value ranged_value_field = self.model._meta.get_field('value').__class__( validators=[validators.MaxValueValidator(limit_value)] ) field_range_message = validators.MaxValueValidator.message % { 'limit_value': max_custom_value, } with self.assertRaisesMessage(ValidationError, '[%r]' % field_range_message): ranged_value_field.run_validators(max_backend_value + 1) def test_types(self): instance = self.model(value=0) self.assertIsInstance(instance.value, int) instance.save() self.assertIsInstance(instance.value, int) instance = self.model.objects.get() self.assertIsInstance(instance.value, int) def test_coercing(self): self.model.objects.create(value='10') instance = self.model.objects.get(value='10') self.assertEqual(instance.value, 10) def test_invalid_value(self): tests = [ (TypeError, ()), (TypeError, []), (TypeError, {}), (TypeError, set()), (TypeError, object()), (TypeError, complex()), (ValueError, 'non-numeric string'), (ValueError, b'non-numeric byte-string'), ] for exception, value in tests: with self.subTest(value): msg = "Field 'value' expected a number but got %r." % (value,) with self.assertRaisesMessage(exception, msg): self.model.objects.create(value=value) class SmallIntegerFieldTests(IntegerFieldTests): model = SmallIntegerModel documented_range = (-32768, 32767) class BigIntegerFieldTests(IntegerFieldTests): model = BigIntegerModel documented_range = (-9223372036854775808, 9223372036854775807) class PositiveSmallIntegerFieldTests(IntegerFieldTests): model = PositiveSmallIntegerModel documented_range = (0, 32767) class PositiveIntegerFieldTests(IntegerFieldTests): model = PositiveIntegerModel documented_range = (0, 2147483647) @unittest.skipIf(connection.vendor == 'sqlite', "SQLite doesn't have a constraint.") def test_negative_values(self): p = PositiveIntegerModel.objects.create(value=0) p.value = models.F('value') - 1 with self.assertRaises(IntegrityError): p.save() class ValidationTests(SimpleTestCase): def test_integerfield_cleans_valid_string(self): f = models.IntegerField() self.assertEqual(f.clean('2', None), 2) def test_integerfield_raises_error_on_invalid_intput(self): f = models.IntegerField() with self.assertRaises(ValidationError): f.clean('a', None) def test_choices_validation_supports_named_groups(self): f = models.IntegerField(choices=(('group', ((10, 'A'), (20, 'B'))), (30, 'C'))) self.assertEqual(10, f.clean(10, None)) def test_nullable_integerfield_raises_error_with_blank_false(self): f = models.IntegerField(null=True, blank=False) with self.assertRaises(ValidationError): f.clean(None, None) def test_nullable_integerfield_cleans_none_on_null_and_blank_true(self): f = models.IntegerField(null=True, blank=True) self.assertIsNone(f.clean(None, None)) def test_integerfield_raises_error_on_empty_input(self): f = models.IntegerField(null=False) with self.assertRaises(ValidationError): f.clean(None, None) with self.assertRaises(ValidationError): f.clean('', None) def test_integerfield_validates_zero_against_choices(self): f = models.IntegerField(choices=((1, 1),)) with self.assertRaises(ValidationError): f.clean('0', None)