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from django.core.exceptions import ValidationError
from django.forms import (
CharField, HiddenInput, PasswordInput, Textarea, TextInput,
)
from django.test import SimpleTestCase
from . import FormFieldAssertionsMixin
class CharFieldTest(FormFieldAssertionsMixin, SimpleTestCase):
def test_charfield_1(self):
f = CharField()
self.assertEqual('1', f.clean(1))
self.assertEqual('hello', f.clean('hello'))
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean(None)
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean('')
self.assertEqual('[1, 2, 3]', f.clean([1, 2, 3]))
self.assertIsNone(f.max_length)
self.assertIsNone(f.min_length)
def test_charfield_2(self):
f = CharField(required=False)
self.assertEqual('1', f.clean(1))
self.assertEqual('hello', f.clean('hello'))
self.assertEqual('', f.clean(None))
self.assertEqual('', f.clean(''))
self.assertEqual('[1, 2, 3]', f.clean([1, 2, 3]))
self.assertIsNone(f.max_length)
self.assertIsNone(f.min_length)
def test_charfield_3(self):
f = CharField(max_length=10, required=False)
self.assertEqual('12345', f.clean('12345'))
self.assertEqual('1234567890', f.clean('1234567890'))
msg = "'Ensure this value has at most 10 characters (it has 11).'"
with self.assertRaisesMessage(ValidationError, msg):
f.clean('1234567890a')
self.assertEqual(f.max_length, 10)
self.assertIsNone(f.min_length)
def test_charfield_4(self):
f = CharField(min_length=10, required=False)
self.assertEqual('', f.clean(''))
msg = "'Ensure this value has at least 10 characters (it has 5).'"
with self.assertRaisesMessage(ValidationError, msg):
f.clean('12345')
self.assertEqual('1234567890', f.clean('1234567890'))
self.assertEqual('1234567890a', f.clean('1234567890a'))
self.assertIsNone(f.max_length)
self.assertEqual(f.min_length, 10)
def test_charfield_5(self):
f = CharField(min_length=10, required=True)
with self.assertRaisesMessage(ValidationError, "'This field is required.'"):
f.clean('')
msg = "'Ensure this value has at least 10 characters (it has 5).'"
with self.assertRaisesMessage(ValidationError, msg):
f.clean('12345')
self.assertEqual('1234567890', f.clean('1234567890'))
self.assertEqual('1234567890a', f.clean('1234567890a'))
self.assertIsNone(f.max_length)
self.assertEqual(f.min_length, 10)
def test_charfield_length_not_int(self):
"""
Setting min_length or max_length to something that is not a number
raises an exception.
"""
with self.assertRaises(ValueError):
CharField(min_length='a')
with self.assertRaises(ValueError):
CharField(max_length='a')
msg = '__init__() takes 1 positional argument but 2 were given'
with self.assertRaisesMessage(TypeError, msg):
CharField('a')
def test_charfield_widget_attrs(self):
"""
CharField.widget_attrs() always returns a dictionary and includes
minlength/maxlength if min_length/max_length are defined on the field
and the widget is not hidden.
"""
# Return an empty dictionary if max_length and min_length are both None.
f = CharField()
self.assertEqual(f.widget_attrs(TextInput()), {})
self.assertEqual(f.widget_attrs(Textarea()), {})
# Return a maxlength attribute equal to max_length.
f = CharField(max_length=10)
self.assertEqual(f.widget_attrs(TextInput()), {'maxlength': '10'})
self.assertEqual(f.widget_attrs(PasswordInput()), {'maxlength': '10'})
self.assertEqual(f.widget_attrs(Textarea()), {'maxlength': '10'})
# Return a minlength attribute equal to min_length.
f = CharField(min_length=5)
self.assertEqual(f.widget_attrs(TextInput()), {'minlength': '5'})
self.assertEqual(f.widget_attrs(PasswordInput()), {'minlength': '5'})
self.assertEqual(f.widget_attrs(Textarea()), {'minlength': '5'})
# Return both maxlength and minlength when both max_length and
# min_length are set.
f = CharField(max_length=10, min_length=5)
self.assertEqual(f.widget_attrs(TextInput()), {'maxlength': '10', 'minlength': '5'})
self.assertEqual(f.widget_attrs(PasswordInput()), {'maxlength': '10', 'minlength': '5'})
self.assertEqual(f.widget_attrs(Textarea()), {'maxlength': '10', 'minlength': '5'})
self.assertEqual(f.widget_attrs(HiddenInput()), {})
def test_charfield_strip(self):
"""
Values have whitespace stripped but not if strip=False.
"""
f = CharField()
self.assertEqual(f.clean(' 1'), '1')
self.assertEqual(f.clean('1 '), '1')
f = CharField(strip=False)
self.assertEqual(f.clean(' 1'), ' 1')
self.assertEqual(f.clean('1 '), '1 ')
def test_strip_before_checking_empty(self):
"""
A whitespace-only value, ' ', is stripped to an empty string and then
converted to the empty value, None.
"""
f = CharField(required=False, empty_value=None)
self.assertIsNone(f.clean(' '))
def test_clean_non_string(self):
"""CharField.clean() calls str(value) before stripping it."""
class StringWrapper:
def __init__(self, v):
self.v = v
def __str__(self):
return self.v
value = StringWrapper(' ')
f1 = CharField(required=False, empty_value=None)
self.assertIsNone(f1.clean(value))
f2 = CharField(strip=False)
self.assertEqual(f2.clean(value), ' ')
def test_charfield_disabled(self):
f = CharField(disabled=True)
self.assertWidgetRendersTo(f, '<input type="text" name="f" id="id_f" disabled required>')
def test_null_characters_prohibited(self):
f = CharField()
msg = 'Null characters are not allowed.'
with self.assertRaisesMessage(ValidationError, msg):
f.clean('\x00something')
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