1 files changed, 161 insertions, 0 deletions
diff --git a/tests/model_fields/test_integerfield.py b/tests/model_fields/test_integerfield.py
new file mode 100644
index 0000000000..27cbdb5259
--- /dev/null
+++ b/tests/model_fields/test_integerfield.py
@@ -0,0 +1,161 @@
+from django.core import validators
+from django.core.exceptions import ValidationError
+from django.db import connection, models
+from django.test import SimpleTestCase, TestCase
+from django.utils import six
+
+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_types(self):
+        instance = self.model(value=0)
+        self.assertIsInstance(instance.value, six.integer_types)
+        instance.save()
+        self.assertIsInstance(instance.value, six.integer_types)
+        instance = self.model.objects.get()
+        self.assertIsInstance(instance.value, six.integer_types)
+
+    def test_coercing(self):
+        self.model.objects.create(value='10')
+        instance = self.model.objects.get(value='10')
+        self.assertEqual(instance.value, 10)
+
+
+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)
+
+
+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)