Support for running the test suite with py.test

 * Get rid of runtests.py
 * Moved test code  from rest_framework/tests and rest_framework/runtests to tests
 * Invoke py.test from setup.py
 * Invoke py.test from Travis
 * Invoke py.test from tox
 * Changed setUpClass to be just plain setUp in test_permissions.py
 * Updated contribution guideline to show how to invoke py.test

1 files changed, 984 insertions, 0 deletions

diff --git a/tests/test_fields.py b/tests/test_fields.py
new file mode 100644
index 00000000..e65a2fb3
--- /dev/null
+++ b/tests/test_fields.py
@@ -0,0 +1,984 @@
+"""
+General serializer field tests.
+"""
+from __future__ import unicode_literals
+
+import datetime
+from decimal import Decimal
+from uuid import uuid4
+from django.core import validators
+from django.db import models
+from django.test import TestCase
+from django.utils.datastructures import SortedDict
+from rest_framework import serializers
+from tests.models import RESTFrameworkModel
+
+
+class TimestampedModel(models.Model):
+    added = models.DateTimeField(auto_now_add=True)
+    updated = models.DateTimeField(auto_now=True)
+
+
+class CharPrimaryKeyModel(models.Model):
+    id = models.CharField(max_length=20, primary_key=True)
+
+
+class TimestampedModelSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = TimestampedModel
+
+
+class CharPrimaryKeyModelSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = CharPrimaryKeyModel
+
+
+class TimeFieldModel(models.Model):
+    clock = models.TimeField()
+
+
+class TimeFieldModelSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = TimeFieldModel
+
+
+SAMPLE_CHOICES = [
+    ('red', 'Red'),
+    ('green', 'Green'),
+    ('blue', 'Blue'),
+]
+
+
+class ChoiceFieldModel(models.Model):
+    choice = models.CharField(choices=SAMPLE_CHOICES, blank=True, max_length=255)
+
+
+class ChoiceFieldModelSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ChoiceFieldModel
+
+
+class ChoiceFieldModelWithNull(models.Model):
+    choice = models.CharField(choices=SAMPLE_CHOICES, blank=True, null=True, max_length=255)
+
+
+class ChoiceFieldModelWithNullSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = ChoiceFieldModelWithNull
+
+
+class BasicFieldTests(TestCase):
+    def test_auto_now_fields_read_only(self):
+        """
+        auto_now and auto_now_add fields should be read_only by default.
+        """
+        serializer = TimestampedModelSerializer()
+        self.assertEqual(serializer.fields['added'].read_only, True)
+
+    def test_auto_pk_fields_read_only(self):
+        """
+        AutoField fields should be read_only by default.
+        """
+        serializer = TimestampedModelSerializer()
+        self.assertEqual(serializer.fields['id'].read_only, True)
+
+    def test_non_auto_pk_fields_not_read_only(self):
+        """
+        PK fields other than AutoField fields should not be read_only by default.
+        """
+        serializer = CharPrimaryKeyModelSerializer()
+        self.assertEqual(serializer.fields['id'].read_only, False)
+
+    def test_dict_field_ordering(self):
+        """
+        Field should preserve dictionary ordering, if it exists.
+        See: https://github.com/tomchristie/django-rest-framework/issues/832
+        """
+        ret = SortedDict()
+        ret['c'] = 1
+        ret['b'] = 1
+        ret['a'] = 1
+        ret['z'] = 1
+        field = serializers.Field()
+        keys = list(field.to_native(ret).keys())
+        self.assertEqual(keys, ['c', 'b', 'a', 'z'])
+
+
+class DateFieldTest(TestCase):
+    """
+    Tests for the DateFieldTest from_native() and to_native() behavior
+    """
+
+    def test_from_native_string(self):
+        """
+        Make sure from_native() accepts default iso input formats.
+        """
+        f = serializers.DateField()
+        result_1 = f.from_native('1984-07-31')
+
+        self.assertEqual(datetime.date(1984, 7, 31), result_1)
+
+    def test_from_native_datetime_date(self):
+        """
+        Make sure from_native() accepts a datetime.date instance.
+        """
+        f = serializers.DateField()
+        result_1 = f.from_native(datetime.date(1984, 7, 31))
+
+        self.assertEqual(result_1, datetime.date(1984, 7, 31))
+
+    def test_from_native_custom_format(self):
+        """
+        Make sure from_native() accepts custom input formats.
+        """
+        f = serializers.DateField(input_formats=['%Y -- %d'])
+        result = f.from_native('1984 -- 31')
+
+        self.assertEqual(datetime.date(1984, 1, 31), result)
+
+    def test_from_native_invalid_default_on_custom_format(self):
+        """
+        Make sure from_native() don't accept default formats if custom format is preset
+        """
+        f = serializers.DateField(input_formats=['%Y -- %d'])
+
+        try:
+            f.from_native('1984-07-31')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Date has wrong format. Use one of these formats instead: YYYY -- DD"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_from_native_empty(self):
+        """
+        Make sure from_native() returns None on empty param.
+        """
+        f = serializers.DateField()
+        result = f.from_native('')
+
+        self.assertEqual(result, None)
+
+    def test_from_native_none(self):
+        """
+        Make sure from_native() returns None on None param.
+        """
+        f = serializers.DateField()
+        result = f.from_native(None)
+
+        self.assertEqual(result, None)
+
+    def test_from_native_invalid_date(self):
+        """
+        Make sure from_native() raises a ValidationError on passing an invalid date.
+        """
+        f = serializers.DateField()
+
+        try:
+            f.from_native('1984-13-31')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Date has wrong format. Use one of these formats instead: YYYY[-MM[-DD]]"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_from_native_invalid_format(self):
+        """
+        Make sure from_native() raises a ValidationError on passing an invalid format.
+        """
+        f = serializers.DateField()
+
+        try:
+            f.from_native('1984 -- 31')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Date has wrong format. Use one of these formats instead: YYYY[-MM[-DD]]"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_to_native(self):
+        """
+        Make sure to_native() returns datetime as default.
+        """
+        f = serializers.DateField()
+
+        result_1 = f.to_native(datetime.date(1984, 7, 31))
+
+        self.assertEqual(datetime.date(1984, 7, 31), result_1)
+
+    def test_to_native_iso(self):
+        """
+        Make sure to_native() with 'iso-8601' returns iso formated date.
+        """
+        f = serializers.DateField(format='iso-8601')
+
+        result_1 = f.to_native(datetime.date(1984, 7, 31))
+
+        self.assertEqual('1984-07-31', result_1)
+
+    def test_to_native_custom_format(self):
+        """
+        Make sure to_native() returns correct custom format.
+        """
+        f = serializers.DateField(format="%Y - %m.%d")
+
+        result_1 = f.to_native(datetime.date(1984, 7, 31))
+
+        self.assertEqual('1984 - 07.31', result_1)
+
+    def test_to_native_none(self):
+        """
+        Make sure from_native() returns None on None param.
+        """
+        f = serializers.DateField(required=False)
+        self.assertEqual(None, f.to_native(None))
+
+
+class DateTimeFieldTest(TestCase):
+    """
+    Tests for the DateTimeField from_native() and to_native() behavior
+    """
+
+    def test_from_native_string(self):
+        """
+        Make sure from_native() accepts default iso input formats.
+        """
+        f = serializers.DateTimeField()
+        result_1 = f.from_native('1984-07-31 04:31')
+        result_2 = f.from_native('1984-07-31 04:31:59')
+        result_3 = f.from_native('1984-07-31 04:31:59.000200')
+
+        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31), result_1)
+        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31, 59), result_2)
+        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31, 59, 200), result_3)
+
+    def test_from_native_datetime_datetime(self):
+        """
+        Make sure from_native() accepts a datetime.datetime instance.
+        """
+        f = serializers.DateTimeField()
+        result_1 = f.from_native(datetime.datetime(1984, 7, 31, 4, 31))
+        result_2 = f.from_native(datetime.datetime(1984, 7, 31, 4, 31, 59))
+        result_3 = f.from_native(datetime.datetime(1984, 7, 31, 4, 31, 59, 200))
+
+        self.assertEqual(result_1, datetime.datetime(1984, 7, 31, 4, 31))
+        self.assertEqual(result_2, datetime.datetime(1984, 7, 31, 4, 31, 59))
+        self.assertEqual(result_3, datetime.datetime(1984, 7, 31, 4, 31, 59, 200))
+
+    def test_from_native_custom_format(self):
+        """
+        Make sure from_native() accepts custom input formats.
+        """
+        f = serializers.DateTimeField(input_formats=['%Y -- %H:%M'])
+        result = f.from_native('1984 -- 04:59')
+
+        self.assertEqual(datetime.datetime(1984, 1, 1, 4, 59), result)
+
+    def test_from_native_invalid_default_on_custom_format(self):
+        """
+        Make sure from_native() don't accept default formats if custom format is preset
+        """
+        f = serializers.DateTimeField(input_formats=['%Y -- %H:%M'])
+
+        try:
+            f.from_native('1984-07-31 04:31:59')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Datetime has wrong format. Use one of these formats instead: YYYY -- hh:mm"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_from_native_empty(self):
+        """
+        Make sure from_native() returns None on empty param.
+        """
+        f = serializers.DateTimeField()
+        result = f.from_native('')
+
+        self.assertEqual(result, None)
+
+    def test_from_native_none(self):
+        """
+        Make sure from_native() returns None on None param.
+        """
+        f = serializers.DateTimeField()
+        result = f.from_native(None)
+
+        self.assertEqual(result, None)
+
+    def test_from_native_invalid_datetime(self):
+        """
+        Make sure from_native() raises a ValidationError on passing an invalid datetime.
+        """
+        f = serializers.DateTimeField()
+
+        try:
+            f.from_native('04:61:59')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Datetime has wrong format. Use one of these formats instead: "
+                                          "YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HHMM|-HHMM|Z]"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_from_native_invalid_format(self):
+        """
+        Make sure from_native() raises a ValidationError on passing an invalid format.
+        """
+        f = serializers.DateTimeField()
+
+        try:
+            f.from_native('04 -- 31')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Datetime has wrong format. Use one of these formats instead: "
+                                          "YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HHMM|-HHMM|Z]"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_to_native(self):
+        """
+        Make sure to_native() returns isoformat as default.
+        """
+        f = serializers.DateTimeField()
+
+        result_1 = f.to_native(datetime.datetime(1984, 7, 31))
+        result_2 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31))
+        result_3 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59))
+        result_4 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59, 200))
+
+        self.assertEqual(datetime.datetime(1984, 7, 31), result_1)
+        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31), result_2)
+        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31, 59), result_3)
+        self.assertEqual(datetime.datetime(1984, 7, 31, 4, 31, 59, 200), result_4)
+
+    def test_to_native_iso(self):
+        """
+        Make sure to_native() with format=iso-8601 returns iso formatted datetime.
+        """
+        f = serializers.DateTimeField(format='iso-8601')
+
+        result_1 = f.to_native(datetime.datetime(1984, 7, 31))
+        result_2 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31))
+        result_3 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59))
+        result_4 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59, 200))
+
+        self.assertEqual('1984-07-31T00:00:00', result_1)
+        self.assertEqual('1984-07-31T04:31:00', result_2)
+        self.assertEqual('1984-07-31T04:31:59', result_3)
+        self.assertEqual('1984-07-31T04:31:59.000200', result_4)
+
+    def test_to_native_custom_format(self):
+        """
+        Make sure to_native() returns correct custom format.
+        """
+        f = serializers.DateTimeField(format="%Y - %H:%M")
+
+        result_1 = f.to_native(datetime.datetime(1984, 7, 31))
+        result_2 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31))
+        result_3 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59))
+        result_4 = f.to_native(datetime.datetime(1984, 7, 31, 4, 31, 59, 200))
+
+        self.assertEqual('1984 - 00:00', result_1)
+        self.assertEqual('1984 - 04:31', result_2)
+        self.assertEqual('1984 - 04:31', result_3)
+        self.assertEqual('1984 - 04:31', result_4)
+
+    def test_to_native_none(self):
+        """
+        Make sure from_native() returns None on None param.
+        """
+        f = serializers.DateTimeField(required=False)
+        self.assertEqual(None, f.to_native(None))
+
+
+class TimeFieldTest(TestCase):
+    """
+    Tests for the TimeField from_native() and to_native() behavior
+    """
+
+    def test_from_native_string(self):
+        """
+        Make sure from_native() accepts default iso input formats.
+        """
+        f = serializers.TimeField()
+        result_1 = f.from_native('04:31')
+        result_2 = f.from_native('04:31:59')
+        result_3 = f.from_native('04:31:59.000200')
+
+        self.assertEqual(datetime.time(4, 31), result_1)
+        self.assertEqual(datetime.time(4, 31, 59), result_2)
+        self.assertEqual(datetime.time(4, 31, 59, 200), result_3)
+
+    def test_from_native_datetime_time(self):
+        """
+        Make sure from_native() accepts a datetime.time instance.
+        """
+        f = serializers.TimeField()
+        result_1 = f.from_native(datetime.time(4, 31))
+        result_2 = f.from_native(datetime.time(4, 31, 59))
+        result_3 = f.from_native(datetime.time(4, 31, 59, 200))
+
+        self.assertEqual(result_1, datetime.time(4, 31))
+        self.assertEqual(result_2, datetime.time(4, 31, 59))
+        self.assertEqual(result_3, datetime.time(4, 31, 59, 200))
+
+    def test_from_native_custom_format(self):
+        """
+        Make sure from_native() accepts custom input formats.
+        """
+        f = serializers.TimeField(input_formats=['%H -- %M'])
+        result = f.from_native('04 -- 31')
+
+        self.assertEqual(datetime.time(4, 31), result)
+
+    def test_from_native_invalid_default_on_custom_format(self):
+        """
+        Make sure from_native() don't accept default formats if custom format is preset
+        """
+        f = serializers.TimeField(input_formats=['%H -- %M'])
+
+        try:
+            f.from_native('04:31:59')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Time has wrong format. Use one of these formats instead: hh -- mm"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_from_native_empty(self):
+        """
+        Make sure from_native() returns None on empty param.
+        """
+        f = serializers.TimeField()
+        result = f.from_native('')
+
+        self.assertEqual(result, None)
+
+    def test_from_native_none(self):
+        """
+        Make sure from_native() returns None on None param.
+        """
+        f = serializers.TimeField()
+        result = f.from_native(None)
+
+        self.assertEqual(result, None)
+
+    def test_from_native_invalid_time(self):
+        """
+        Make sure from_native() raises a ValidationError on passing an invalid time.
+        """
+        f = serializers.TimeField()
+
+        try:
+            f.from_native('04:61:59')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Time has wrong format. Use one of these formats instead: "
+                                          "hh:mm[:ss[.uuuuuu]]"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_from_native_invalid_format(self):
+        """
+        Make sure from_native() raises a ValidationError on passing an invalid format.
+        """
+        f = serializers.TimeField()
+
+        try:
+            f.from_native('04 -- 31')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Time has wrong format. Use one of these formats instead: "
+                                          "hh:mm[:ss[.uuuuuu]]"])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_to_native(self):
+        """
+        Make sure to_native() returns time object as default.
+        """
+        f = serializers.TimeField()
+        result_1 = f.to_native(datetime.time(4, 31))
+        result_2 = f.to_native(datetime.time(4, 31, 59))
+        result_3 = f.to_native(datetime.time(4, 31, 59, 200))
+
+        self.assertEqual(datetime.time(4, 31), result_1)
+        self.assertEqual(datetime.time(4, 31, 59), result_2)
+        self.assertEqual(datetime.time(4, 31, 59, 200), result_3)
+
+    def test_to_native_iso(self):
+        """
+        Make sure to_native() with format='iso-8601' returns iso formatted time.
+        """
+        f = serializers.TimeField(format='iso-8601')
+        result_1 = f.to_native(datetime.time(4, 31))
+        result_2 = f.to_native(datetime.time(4, 31, 59))
+        result_3 = f.to_native(datetime.time(4, 31, 59, 200))
+
+        self.assertEqual('04:31:00', result_1)
+        self.assertEqual('04:31:59', result_2)
+        self.assertEqual('04:31:59.000200', result_3)
+
+    def test_to_native_custom_format(self):
+        """
+        Make sure to_native() returns correct custom format.
+        """
+        f = serializers.TimeField(format="%H - %S [%f]")
+        result_1 = f.to_native(datetime.time(4, 31))
+        result_2 = f.to_native(datetime.time(4, 31, 59))
+        result_3 = f.to_native(datetime.time(4, 31, 59, 200))
+
+        self.assertEqual('04 - 00 [000000]', result_1)
+        self.assertEqual('04 - 59 [000000]', result_2)
+        self.assertEqual('04 - 59 [000200]', result_3)
+
+
+class DecimalFieldTest(TestCase):
+    """
+    Tests for the DecimalField from_native() and to_native() behavior
+    """
+
+    def test_from_native_string(self):
+        """
+        Make sure from_native() accepts string values
+        """
+        f = serializers.DecimalField()
+        result_1 = f.from_native('9000')
+        result_2 = f.from_native('1.00000001')
+
+        self.assertEqual(Decimal('9000'), result_1)
+        self.assertEqual(Decimal('1.00000001'), result_2)
+
+    def test_from_native_invalid_string(self):
+        """
+        Make sure from_native() raises ValidationError on passing invalid string
+        """
+        f = serializers.DecimalField()
+
+        try:
+            f.from_native('123.45.6')
+        except validators.ValidationError as e:
+            self.assertEqual(e.messages, ["Enter a number."])
+        else:
+            self.fail("ValidationError was not properly raised")
+
+    def test_from_native_integer(self):
+        """
+        Make sure from_native() accepts integer values
+        """
+        f = serializers.DecimalField()
+        result = f.from_native(9000)
+
+        self.assertEqual(Decimal('9000'), result)
+
+    def test_from_native_float(self):
+        """
+        Make sure from_native() accepts float values
+        """
+        f = serializers.DecimalField()
+        result = f.from_native(1.00000001)
+
+        self.assertEqual(Decimal('1.00000001'), result)
+
+    def test_from_native_empty(self):
+        """
+        Make sure from_native() returns None on empty param.
+        """
+        f = serializers.DecimalField()
+        result = f.from_native('')
+
+        self.assertEqual(result, None)
+
+    def test_from_native_none(self):
+        """
+        Make sure from_native() returns None on None param.
+        """
+        f = serializers.DecimalField()
+        result = f.from_native(None)
+
+        self.assertEqual(result, None)
+
+    def test_to_native(self):
+        """
+        Make sure to_native() returns Decimal as string.
+        """
+        f = serializers.DecimalField()
+
+        result_1 = f.to_native(Decimal('9000'))
+        result_2 = f.to_native(Decimal('1.00000001'))
+
+        self.assertEqual(Decimal('9000'), result_1)
+        self.assertEqual(Decimal('1.00000001'), result_2)
+
+    def test_to_native_none(self):
+        """
+        Make sure from_native() returns None on None param.
+        """
+        f = serializers.DecimalField(required=False)
+        self.assertEqual(None, f.to_native(None))
+
+    def test_valid_serialization(self):
+        """
+        Make sure the serializer works correctly
+        """
+        class DecimalSerializer(serializers.Serializer):
+            decimal_field = serializers.DecimalField(max_value=9010,
+                                                     min_value=9000,
+                                                     max_digits=6,
+                                                     decimal_places=2)
+
+        self.assertTrue(DecimalSerializer(data={'decimal_field': '9001'}).is_valid())
+        self.assertTrue(DecimalSerializer(data={'decimal_field': '9001.2'}).is_valid())
+        self.assertTrue(DecimalSerializer(data={'decimal_field': '9001.23'}).is_valid())
+
+        self.assertFalse(DecimalSerializer(data={'decimal_field': '8000'}).is_valid())
+        self.assertFalse(DecimalSerializer(data={'decimal_field': '9900'}).is_valid())
+        self.assertFalse(DecimalSerializer(data={'decimal_field': '9001.234'}).is_valid())
+
+    def test_raise_max_value(self):
+        """
+        Make sure max_value violations raises ValidationError
+        """
+        class DecimalSerializer(serializers.Serializer):
+            decimal_field = serializers.DecimalField(max_value=100)
+
+        s = DecimalSerializer(data={'decimal_field': '123'})
+
+        self.assertFalse(s.is_valid())
+        self.assertEqual(s.errors,  {'decimal_field': ['Ensure this value is less than or equal to 100.']})
+
+    def test_raise_min_value(self):
+        """
+        Make sure min_value violations raises ValidationError
+        """
+        class DecimalSerializer(serializers.Serializer):
+            decimal_field = serializers.DecimalField(min_value=100)
+
+        s = DecimalSerializer(data={'decimal_field': '99'})
+
+        self.assertFalse(s.is_valid())
+        self.assertEqual(s.errors,  {'decimal_field': ['Ensure this value is greater than or equal to 100.']})
+
+    def test_raise_max_digits(self):
+        """
+        Make sure max_digits violations raises ValidationError
+        """
+        class DecimalSerializer(serializers.Serializer):
+            decimal_field = serializers.DecimalField(max_digits=5)
+
+        s = DecimalSerializer(data={'decimal_field': '123.456'})
+
+        self.assertFalse(s.is_valid())
+        self.assertEqual(s.errors,  {'decimal_field': ['Ensure that there are no more than 5 digits in total.']})
+
+    def test_raise_max_decimal_places(self):
+        """
+        Make sure max_decimal_places violations raises ValidationError
+        """
+        class DecimalSerializer(serializers.Serializer):
+            decimal_field = serializers.DecimalField(decimal_places=3)
+
+        s = DecimalSerializer(data={'decimal_field': '123.4567'})
+
+        self.assertFalse(s.is_valid())
+        self.assertEqual(s.errors,  {'decimal_field': ['Ensure that there are no more than 3 decimal places.']})
+
+    def test_raise_max_whole_digits(self):
+        """
+        Make sure max_whole_digits violations raises ValidationError
+        """
+        class DecimalSerializer(serializers.Serializer):
+            decimal_field = serializers.DecimalField(max_digits=4, decimal_places=3)
+
+        s = DecimalSerializer(data={'decimal_field': '12345.6'})
+
+        self.assertFalse(s.is_valid())
+        self.assertEqual(s.errors,  {'decimal_field': ['Ensure that there are no more than 4 digits in total.']})
+
+
+class ChoiceFieldTests(TestCase):
+    """
+    Tests for the ChoiceField options generator
+    """
+    def test_choices_required(self):
+        """
+        Make sure proper choices are rendered if field is required
+        """
+        f = serializers.ChoiceField(required=True, choices=SAMPLE_CHOICES)
+        self.assertEqual(f.choices, SAMPLE_CHOICES)
+
+    def test_choices_not_required(self):
+        """
+        Make sure proper choices (plus blank) are rendered if the field isn't required
+        """
+        f = serializers.ChoiceField(required=False, choices=SAMPLE_CHOICES)
+        self.assertEqual(f.choices, models.fields.BLANK_CHOICE_DASH + SAMPLE_CHOICES)
+
+    def test_invalid_choice_model(self):
+        s = ChoiceFieldModelSerializer(data={'choice': 'wrong_value'})
+        self.assertFalse(s.is_valid())
+        self.assertEqual(s.errors,  {'choice': ['Select a valid choice. wrong_value is not one of the available choices.']})
+        self.assertEqual(s.data['choice'], '')
+
+    def test_empty_choice_model(self):
+        """
+        Test that the 'empty' value is correctly passed and used depending on
+        the 'null' property on the model field.
+        """
+        s = ChoiceFieldModelSerializer(data={'choice': ''})
+        self.assertTrue(s.is_valid())
+        self.assertEqual(s.data['choice'], '')
+
+        s = ChoiceFieldModelWithNullSerializer(data={'choice': ''})
+        self.assertTrue(s.is_valid())
+        self.assertEqual(s.data['choice'], None)
+
+    def test_from_native_empty(self):
+        """
+        Make sure from_native() returns an empty string on empty param by default.
+        """
+        f = serializers.ChoiceField(choices=SAMPLE_CHOICES)
+        self.assertEqual(f.from_native(''), '')
+        self.assertEqual(f.from_native(None), '')
+
+    def test_from_native_empty_override(self):
+        """
+        Make sure you can override from_native() behavior regarding empty values.
+        """
+        f = serializers.ChoiceField(choices=SAMPLE_CHOICES, empty=None)
+        self.assertEqual(f.from_native(''), None)
+        self.assertEqual(f.from_native(None), None)
+
+    def test_metadata_choices(self):
+        """
+        Make sure proper choices are included in the field's metadata.
+        """
+        choices = [{'value': v, 'display_name': n} for v, n in SAMPLE_CHOICES]
+        f = serializers.ChoiceField(choices=SAMPLE_CHOICES)
+        self.assertEqual(f.metadata()['choices'], choices)
+
+    def test_metadata_choices_not_required(self):
+        """
+        Make sure proper choices are included in the field's metadata.
+        """
+        choices = [{'value': v, 'display_name': n}
+                   for v, n in models.fields.BLANK_CHOICE_DASH + SAMPLE_CHOICES]
+        f = serializers.ChoiceField(required=False, choices=SAMPLE_CHOICES)
+        self.assertEqual(f.metadata()['choices'], choices)
+
+
+class EmailFieldTests(TestCase):
+    """
+    Tests for EmailField attribute values
+    """
+
+    class EmailFieldModel(RESTFrameworkModel):
+        email_field = models.EmailField(blank=True)
+
+    class EmailFieldWithGivenMaxLengthModel(RESTFrameworkModel):
+        email_field = models.EmailField(max_length=150, blank=True)
+
+    def test_default_model_value(self):
+        class EmailFieldSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = self.EmailFieldModel
+
+        serializer = EmailFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['email_field'], 'max_length'), 75)
+
+    def test_given_model_value(self):
+        class EmailFieldSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = self.EmailFieldWithGivenMaxLengthModel
+
+        serializer = EmailFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['email_field'], 'max_length'), 150)
+
+    def test_given_serializer_value(self):
+        class EmailFieldSerializer(serializers.ModelSerializer):
+            email_field = serializers.EmailField(source='email_field', max_length=20, required=False)
+
+            class Meta:
+                model = self.EmailFieldModel
+
+        serializer = EmailFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['email_field'], 'max_length'), 20)
+
+
+class SlugFieldTests(TestCase):
+    """
+    Tests for SlugField attribute values
+    """
+
+    class SlugFieldModel(RESTFrameworkModel):
+        slug_field = models.SlugField(blank=True)
+
+    class SlugFieldWithGivenMaxLengthModel(RESTFrameworkModel):
+        slug_field = models.SlugField(max_length=84, blank=True)
+
+    def test_default_model_value(self):
+        class SlugFieldSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = self.SlugFieldModel
+
+        serializer = SlugFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['slug_field'], 'max_length'), 50)
+
+    def test_given_model_value(self):
+        class SlugFieldSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = self.SlugFieldWithGivenMaxLengthModel
+
+        serializer = SlugFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['slug_field'], 'max_length'), 84)
+
+    def test_given_serializer_value(self):
+        class SlugFieldSerializer(serializers.ModelSerializer):
+            slug_field = serializers.SlugField(source='slug_field',
+                                               max_length=20, required=False)
+
+            class Meta:
+                model = self.SlugFieldModel
+
+        serializer = SlugFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['slug_field'],
+                                 'max_length'), 20)
+
+    def test_invalid_slug(self):
+        """
+        Make sure an invalid slug raises ValidationError
+        """
+        class SlugFieldSerializer(serializers.ModelSerializer):
+            slug_field = serializers.SlugField(source='slug_field', max_length=20, required=True)
+
+            class Meta:
+                model = self.SlugFieldModel
+
+        s = SlugFieldSerializer(data={'slug_field': 'a b'})
+
+        self.assertEqual(s.is_valid(), False)
+        self.assertEqual(s.errors,  {'slug_field': ["Enter a valid 'slug' consisting of letters, numbers, underscores or hyphens."]})
+
+
+class URLFieldTests(TestCase):
+    """
+    Tests for URLField attribute values.
+
+    (Includes test for #1210, checking that validators can be overridden.)
+    """
+
+    class URLFieldModel(RESTFrameworkModel):
+        url_field = models.URLField(blank=True)
+
+    class URLFieldWithGivenMaxLengthModel(RESTFrameworkModel):
+        url_field = models.URLField(max_length=128, blank=True)
+
+    def test_default_model_value(self):
+        class URLFieldSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = self.URLFieldModel
+
+        serializer = URLFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['url_field'],
+                                 'max_length'), 200)
+
+    def test_given_model_value(self):
+        class URLFieldSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = self.URLFieldWithGivenMaxLengthModel
+
+        serializer = URLFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['url_field'],
+                                 'max_length'), 128)
+
+    def test_given_serializer_value(self):
+        class URLFieldSerializer(serializers.ModelSerializer):
+            url_field = serializers.URLField(source='url_field',
+                                             max_length=20, required=False)
+
+            class Meta:
+                model = self.URLFieldWithGivenMaxLengthModel
+
+        serializer = URLFieldSerializer(data={})
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(getattr(serializer.fields['url_field'],
+                         'max_length'), 20)
+
+    def test_validators_can_be_overridden(self):
+        url_field = serializers.URLField(validators=[])
+        validators = url_field.validators
+        self.assertEqual([], validators, 'Passing `validators` kwarg should have overridden default validators')
+
+
+class FieldMetadata(TestCase):
+    def setUp(self):
+        self.required_field = serializers.Field()
+        self.required_field.label = uuid4().hex
+        self.required_field.required = True
+
+        self.optional_field = serializers.Field()
+        self.optional_field.label = uuid4().hex
+        self.optional_field.required = False
+
+    def test_required(self):
+        self.assertEqual(self.required_field.metadata()['required'], True)
+
+    def test_optional(self):
+        self.assertEqual(self.optional_field.metadata()['required'], False)
+
+    def test_label(self):
+        for field in (self.required_field, self.optional_field):
+            self.assertEqual(field.metadata()['label'], field.label)
+
+
+class FieldCallableDefault(TestCase):
+    def setUp(self):
+        self.simple_callable = lambda: 'foo bar'
+
+    def test_default_can_be_simple_callable(self):
+        """
+        Ensure that the 'default' argument can also be a simple callable.
+        """
+        field = serializers.WritableField(default=self.simple_callable)
+        into = {}
+        field.field_from_native({}, {}, 'field', into)
+        self.assertEqual(into, {'field': 'foo bar'})
+
+
+class CustomIntegerField(TestCase):
+    """
+        Test that custom fields apply min_value and max_value constraints
+    """
+    def test_custom_fields_can_be_validated_for_value(self):
+
+        class MoneyField(models.PositiveIntegerField):
+            pass
+
+        class EntryModel(models.Model):
+            bank = MoneyField(validators=[validators.MaxValueValidator(100)])
+
+        class EntrySerializer(serializers.ModelSerializer):
+            class Meta:
+                model = EntryModel
+
+        entry = EntryModel(bank=1)
+
+        serializer = EntrySerializer(entry, data={"bank": 11})
+        self.assertTrue(serializer.is_valid())
+
+        serializer = EntrySerializer(entry, data={"bank": -1})
+        self.assertFalse(serializer.is_valid())
+
+        serializer = EntrySerializer(entry, data={"bank": 101})
+        self.assertFalse(serializer.is_valid())
+
+
+class BooleanField(TestCase):
+    """
+        Tests for BooleanField
+    """
+    def test_boolean_required(self):
+        class BooleanRequiredSerializer(serializers.Serializer):
+            bool_field = serializers.BooleanField(required=True)
+
+        self.assertFalse(BooleanRequiredSerializer(data={}).is_valid())