269 lines
10 KiB
Python
269 lines
10 KiB
Python
import pickle
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from django import forms
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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 django.utils.functional import lazy
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from .models import (
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Bar, Choiceful, Foo, RenamedField, VerboseNameField, Whiz, WhizDelayed,
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WhizIter, WhizIterEmpty,
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)
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class Nested:
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class Field(models.Field):
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pass
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class BasicFieldTests(SimpleTestCase):
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def test_show_hidden_initial(self):
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"""
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Fields with choices respect show_hidden_initial as a kwarg to
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formfield().
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"""
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choices = [(0, 0), (1, 1)]
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model_field = models.Field(choices=choices)
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form_field = model_field.formfield(show_hidden_initial=True)
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self.assertTrue(form_field.show_hidden_initial)
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form_field = model_field.formfield(show_hidden_initial=False)
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self.assertFalse(form_field.show_hidden_initial)
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def test_field_repr(self):
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"""
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__repr__() of a field displays its name.
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"""
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f = Foo._meta.get_field('a')
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self.assertEqual(repr(f), '<django.db.models.fields.CharField: a>')
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f = models.fields.CharField()
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self.assertEqual(repr(f), '<django.db.models.fields.CharField>')
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def test_field_repr_nested(self):
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"""__repr__() uses __qualname__ for nested class support."""
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self.assertEqual(repr(Nested.Field()), '<model_fields.tests.Nested.Field>')
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def test_field_name(self):
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"""
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A defined field name (name="fieldname") is used instead of the model
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model's attribute name (modelname).
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"""
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instance = RenamedField()
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self.assertTrue(hasattr(instance, 'get_fieldname_display'))
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self.assertFalse(hasattr(instance, 'get_modelname_display'))
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def test_field_verbose_name(self):
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m = VerboseNameField
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for i in range(1, 23):
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self.assertEqual(m._meta.get_field('field%d' % i).verbose_name, 'verbose field%d' % i)
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self.assertEqual(m._meta.get_field('id').verbose_name, 'verbose pk')
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def test_choices_form_class(self):
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"""Can supply a custom choices form class to Field.formfield()"""
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choices = [('a', 'a')]
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field = models.CharField(choices=choices)
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klass = forms.TypedMultipleChoiceField
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self.assertIsInstance(field.formfield(choices_form_class=klass), klass)
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def test_formfield_disabled(self):
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"""Field.formfield() sets disabled for fields with choices."""
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field = models.CharField(choices=[('a', 'b')])
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form_field = field.formfield(disabled=True)
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self.assertIs(form_field.disabled, True)
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def test_field_str(self):
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f = models.Field()
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self.assertEqual(str(f), '<django.db.models.fields.Field>')
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f = Foo._meta.get_field('a')
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self.assertEqual(str(f), 'model_fields.Foo.a')
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def test_field_ordering(self):
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"""Fields are ordered based on their creation."""
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f1 = models.Field()
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f2 = models.Field(auto_created=True)
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f3 = models.Field()
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self.assertLess(f2, f1)
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self.assertGreater(f3, f1)
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self.assertIsNotNone(f1)
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self.assertNotIn(f2, (None, 1, ''))
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def test_field_instance_is_picklable(self):
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"""Field instances can be pickled."""
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field = models.Field(max_length=100, default='a string')
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# Must be picklable with this cached property populated (#28188).
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field._get_default
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pickle.dumps(field)
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def test_deconstruct_nested_field(self):
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"""deconstruct() uses __qualname__ for nested class support."""
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name, path, args, kwargs = Nested.Field().deconstruct()
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self.assertEqual(path, 'model_fields.tests.Nested.Field')
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class ChoicesTests(SimpleTestCase):
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@classmethod
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def setUpClass(cls):
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super().setUpClass()
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cls.no_choices = Choiceful._meta.get_field('no_choices')
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cls.empty_choices = Choiceful._meta.get_field('empty_choices')
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cls.empty_choices_bool = Choiceful._meta.get_field('empty_choices_bool')
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cls.empty_choices_text = Choiceful._meta.get_field('empty_choices_text')
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cls.with_choices = Choiceful._meta.get_field('with_choices')
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def test_choices(self):
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self.assertIsNone(self.no_choices.choices)
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self.assertEqual(self.empty_choices.choices, ())
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self.assertEqual(self.with_choices.choices, [(1, 'A')])
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def test_flatchoices(self):
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self.assertEqual(self.no_choices.flatchoices, [])
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self.assertEqual(self.empty_choices.flatchoices, [])
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self.assertEqual(self.with_choices.flatchoices, [(1, 'A')])
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def test_check(self):
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self.assertEqual(Choiceful.check(), [])
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def test_invalid_choice(self):
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model_instance = None # Actual model instance not needed.
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self.no_choices.validate(0, model_instance)
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msg = "['Value 99 is not a valid choice.']"
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with self.assertRaisesMessage(ValidationError, msg):
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self.empty_choices.validate(99, model_instance)
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with self.assertRaisesMessage(ValidationError, msg):
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self.with_choices.validate(99, model_instance)
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def test_formfield(self):
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no_choices_formfield = self.no_choices.formfield()
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self.assertIsInstance(no_choices_formfield, forms.IntegerField)
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fields = (
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self.empty_choices, self.with_choices, self.empty_choices_bool,
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self.empty_choices_text,
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)
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for field in fields:
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with self.subTest(field=field):
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self.assertIsInstance(field.formfield(), forms.ChoiceField)
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class GetFieldDisplayTests(SimpleTestCase):
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def test_choices_and_field_display(self):
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"""
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get_choices() interacts with get_FIELD_display() to return the expected
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values.
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"""
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self.assertEqual(Whiz(c=1).get_c_display(), 'First') # A nested value
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self.assertEqual(Whiz(c=0).get_c_display(), 'Other') # A top level value
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self.assertEqual(Whiz(c=9).get_c_display(), 9) # Invalid value
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self.assertIsNone(Whiz(c=None).get_c_display()) # Blank value
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self.assertEqual(Whiz(c='').get_c_display(), '') # Empty value
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self.assertEqual(WhizDelayed(c=0).get_c_display(), 'Other') # Delayed choices
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def test_get_FIELD_display_translated(self):
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"""A translated display value is coerced to str."""
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val = Whiz(c=5).get_c_display()
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self.assertIsInstance(val, str)
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self.assertEqual(val, 'translated')
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def test_iterator_choices(self):
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"""
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get_choices() works with Iterators.
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"""
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self.assertEqual(WhizIter(c=1).c, 1) # A nested value
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self.assertEqual(WhizIter(c=9).c, 9) # Invalid value
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self.assertIsNone(WhizIter(c=None).c) # Blank value
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self.assertEqual(WhizIter(c='').c, '') # Empty value
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def test_empty_iterator_choices(self):
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"""
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get_choices() works with empty iterators.
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"""
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self.assertEqual(WhizIterEmpty(c="a").c, "a") # A nested value
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self.assertEqual(WhizIterEmpty(c="b").c, "b") # Invalid value
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self.assertIsNone(WhizIterEmpty(c=None).c) # Blank value
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self.assertEqual(WhizIterEmpty(c='').c, '') # Empty value
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class GetChoicesTests(SimpleTestCase):
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def test_empty_choices(self):
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choices = []
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f = models.CharField(choices=choices)
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self.assertEqual(f.get_choices(include_blank=False), choices)
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def test_blank_in_choices(self):
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choices = [('', '<><>'), ('a', 'A')]
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f = models.CharField(choices=choices)
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self.assertEqual(f.get_choices(include_blank=True), choices)
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def test_blank_in_grouped_choices(self):
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choices = [
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('f', 'Foo'),
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('b', 'Bar'),
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('Group', (
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('', 'No Preference'),
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('fg', 'Foo'),
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('bg', 'Bar'),
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)),
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]
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f = models.CharField(choices=choices)
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self.assertEqual(f.get_choices(include_blank=True), choices)
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def test_lazy_strings_not_evaluated(self):
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lazy_func = lazy(lambda x: 0 / 0, int) # raises ZeroDivisionError if evaluated.
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f = models.CharField(choices=[(lazy_func('group'), (('a', 'A'), ('b', 'B')))])
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self.assertEqual(f.get_choices(include_blank=True)[0], ('', '---------'))
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class GetChoicesOrderingTests(TestCase):
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@classmethod
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def setUpTestData(cls):
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cls.foo1 = Foo.objects.create(a='a', d='12.35')
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cls.foo2 = Foo.objects.create(a='b', d='12.34')
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cls.bar1 = Bar.objects.create(a=cls.foo1, b='b')
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cls.bar2 = Bar.objects.create(a=cls.foo2, b='a')
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cls.field = Bar._meta.get_field('a')
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def assertChoicesEqual(self, choices, objs):
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self.assertEqual(choices, [(obj.pk, str(obj)) for obj in objs])
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def test_get_choices(self):
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self.assertChoicesEqual(
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self.field.get_choices(include_blank=False, ordering=('a',)),
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[self.foo1, self.foo2]
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)
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self.assertChoicesEqual(
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self.field.get_choices(include_blank=False, ordering=('-a',)),
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[self.foo2, self.foo1]
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)
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def test_get_choices_default_ordering(self):
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self.addCleanup(setattr, Foo._meta, 'ordering', Foo._meta.ordering)
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Foo._meta.ordering = ('d',)
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self.assertChoicesEqual(
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self.field.get_choices(include_blank=False),
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[self.foo2, self.foo1]
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)
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def test_get_choices_reverse_related_field(self):
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self.assertChoicesEqual(
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self.field.remote_field.get_choices(include_blank=False, ordering=('a',)),
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[self.bar1, self.bar2]
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)
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self.assertChoicesEqual(
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self.field.remote_field.get_choices(include_blank=False, ordering=('-a',)),
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[self.bar2, self.bar1]
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)
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def test_get_choices_reverse_related_field_default_ordering(self):
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self.addCleanup(setattr, Bar._meta, 'ordering', Bar._meta.ordering)
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Bar._meta.ordering = ('b',)
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self.assertChoicesEqual(
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self.field.remote_field.get_choices(include_blank=False),
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[self.bar2, self.bar1]
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)
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