django/tests/forms_tests/field_tests/test_nullbooleanfield.py

from django.forms import Form, HiddenInput, NullBooleanField, RadioSelect
from django.test import SimpleTestCase

from . import FormFieldAssertionsMixin


class NullBooleanFieldTest(FormFieldAssertionsMixin, SimpleTestCase):

    def test_nullbooleanfield_clean(self):
        f = NullBooleanField()
        self.assertIsNone(f.clean(''))
        self.assertTrue(f.clean(True))
        self.assertFalse(f.clean(False))
        self.assertIsNone(f.clean(None))
        self.assertFalse(f.clean('0'))
        self.assertTrue(f.clean('1'))
        self.assertIsNone(f.clean('2'))
        self.assertIsNone(f.clean('3'))
        self.assertIsNone(f.clean('hello'))
        self.assertTrue(f.clean('true'))
        self.assertFalse(f.clean('false'))

    def test_nullbooleanfield_2(self):
        # The internal value is preserved if using HiddenInput (#7753).
        class HiddenNullBooleanForm(Form):
            hidden_nullbool1 = NullBooleanField(widget=HiddenInput, initial=True)
            hidden_nullbool2 = NullBooleanField(widget=HiddenInput, initial=False)
        f = HiddenNullBooleanForm()
        self.assertHTMLEqual(
            '<input type="hidden" name="hidden_nullbool1" value="True" id="id_hidden_nullbool1" />'
            '<input type="hidden" name="hidden_nullbool2" value="False" id="id_hidden_nullbool2" />',
            str(f)
        )

    def test_nullbooleanfield_3(self):
        class HiddenNullBooleanForm(Form):
            hidden_nullbool1 = NullBooleanField(widget=HiddenInput, initial=True)
            hidden_nullbool2 = NullBooleanField(widget=HiddenInput, initial=False)
        f = HiddenNullBooleanForm({'hidden_nullbool1': 'True', 'hidden_nullbool2': 'False'})
        self.assertIsNone(f.full_clean())
        self.assertTrue(f.cleaned_data['hidden_nullbool1'])
        self.assertFalse(f.cleaned_data['hidden_nullbool2'])

    def test_nullbooleanfield_4(self):
        # Make sure we're compatible with MySQL, which uses 0 and 1 for its
        # boolean values (#9609).
        NULLBOOL_CHOICES = (('1', 'Yes'), ('0', 'No'), ('', 'Unknown'))

        class MySQLNullBooleanForm(Form):
            nullbool0 = NullBooleanField(widget=RadioSelect(choices=NULLBOOL_CHOICES))
            nullbool1 = NullBooleanField(widget=RadioSelect(choices=NULLBOOL_CHOICES))
            nullbool2 = NullBooleanField(widget=RadioSelect(choices=NULLBOOL_CHOICES))
        f = MySQLNullBooleanForm({'nullbool0': '1', 'nullbool1': '0', 'nullbool2': ''})
        self.assertIsNone(f.full_clean())
        self.assertTrue(f.cleaned_data['nullbool0'])
        self.assertFalse(f.cleaned_data['nullbool1'])
        self.assertIsNone(f.cleaned_data['nullbool2'])

    def test_nullbooleanfield_changed(self):
        f = NullBooleanField()
        self.assertTrue(f.has_changed(False, None))
        self.assertTrue(f.has_changed(None, False))
        self.assertFalse(f.has_changed(None, None))
        self.assertFalse(f.has_changed(False, False))
        self.assertTrue(f.has_changed(True, False))
        self.assertTrue(f.has_changed(True, None))
        self.assertTrue(f.has_changed(True, False))
        # HiddenInput widget sends string values for boolean but doesn't clean them in value_from_datadict
        self.assertFalse(f.has_changed(False, 'False'))
        self.assertFalse(f.has_changed(True, 'True'))
        self.assertFalse(f.has_changed(None, ''))
        self.assertTrue(f.has_changed(False, 'True'))
        self.assertTrue(f.has_changed(True, 'False'))
        self.assertTrue(f.has_changed(None, 'False'))