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107 lines
3.8 KiB
Python
107 lines
3.8 KiB
Python
from django.core.exceptions import ValidationError
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from django.db import models
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from django.test import SimpleTestCase, TestCase
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from .models import Post
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class TestCharField(TestCase):
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def test_max_length_passed_to_formfield(self):
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"""
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CharField passes its max_length attribute to form fields created using
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the formfield() method.
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"""
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cf1 = models.CharField()
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cf2 = models.CharField(max_length=1234)
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self.assertIsNone(cf1.formfield().max_length)
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self.assertEqual(1234, cf2.formfield().max_length)
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def test_lookup_integer_in_charfield(self):
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self.assertEqual(Post.objects.filter(title=9).count(), 0)
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def test_emoji(self):
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p = Post.objects.create(title="Smile 😀", body="Whatever.")
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p.refresh_from_db()
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self.assertEqual(p.title, "Smile 😀")
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def test_assignment_from_choice_enum(self):
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class Event(models.TextChoices):
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C = "Carnival!"
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F = "Festival!"
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p1 = Post.objects.create(title=Event.C, body=Event.F)
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p1.refresh_from_db()
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self.assertEqual(p1.title, "Carnival!")
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self.assertEqual(p1.body, "Festival!")
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self.assertEqual(p1.title, Event.C)
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self.assertEqual(p1.body, Event.F)
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p2 = Post.objects.get(title="Carnival!")
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self.assertEqual(p1, p2)
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self.assertEqual(p2.title, Event.C)
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class TestMethods(SimpleTestCase):
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def test_deconstruct(self):
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field = models.CharField()
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*_, kwargs = field.deconstruct()
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self.assertEqual(kwargs, {})
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field = models.CharField(db_collation="utf8_esperanto_ci")
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*_, kwargs = field.deconstruct()
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self.assertEqual(kwargs, {"db_collation": "utf8_esperanto_ci"})
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class ValidationTests(SimpleTestCase):
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class Choices(models.TextChoices):
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C = "c", "C"
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def test_charfield_raises_error_on_empty_string(self):
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f = models.CharField()
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msg = "This field cannot be blank."
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with self.assertRaisesMessage(ValidationError, msg):
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f.clean("", None)
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def test_charfield_cleans_empty_string_when_blank_true(self):
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f = models.CharField(blank=True)
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self.assertEqual("", f.clean("", None))
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def test_charfield_with_choices_cleans_valid_choice(self):
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f = models.CharField(max_length=1, choices=[("a", "A"), ("b", "B")])
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self.assertEqual("a", f.clean("a", None))
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def test_charfield_with_choices_raises_error_on_invalid_choice(self):
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f = models.CharField(choices=[("a", "A"), ("b", "B")])
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msg = "Value 'not a' is not a valid choice."
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with self.assertRaisesMessage(ValidationError, msg):
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f.clean("not a", None)
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def test_enum_choices_cleans_valid_string(self):
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f = models.CharField(choices=self.Choices, max_length=1)
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self.assertEqual(f.clean("c", None), "c")
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def test_enum_choices_invalid_input(self):
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f = models.CharField(choices=self.Choices, max_length=1)
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msg = "Value 'a' is not a valid choice."
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with self.assertRaisesMessage(ValidationError, msg):
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f.clean("a", None)
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def test_charfield_raises_error_on_empty_input(self):
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f = models.CharField(null=False)
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msg = "This field cannot be null."
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with self.assertRaisesMessage(ValidationError, msg):
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f.clean(None, None)
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def test_callable_choices(self):
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def get_choices():
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return {str(i): f"Option {i}" for i in range(3)}
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f = models.CharField(max_length=1, choices=get_choices)
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for i in get_choices():
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with self.subTest(i=i):
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self.assertEqual(i, f.clean(i, None))
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with self.assertRaises(ValidationError):
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f.clean("A", None)
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with self.assertRaises(ValidationError):
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f.clean("3", None)
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