1 files changed, 28 insertions, 24 deletions

diff --git a/tests/forms_tests/field_tests/test_nullbooleanfield.py b/tests/forms_tests/field_tests/test_nullbooleanfield.py
index 55812612c9..5b632c8de3 100644
--- a/tests/forms_tests/field_tests/test_nullbooleanfield.py
+++ b/tests/forms_tests/field_tests/test_nullbooleanfield.py
@@ -5,56 +5,60 @@ from . import FormFieldAssertionsMixin
 
 
 class NullBooleanFieldTest(FormFieldAssertionsMixin, SimpleTestCase):
-
     def test_nullbooleanfield_clean(self):
         f = NullBooleanField()
-        self.assertIsNone(f.clean(''))
+        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'))
+        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)
+            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'})
+
+        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'])
+        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'))
+        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': ''})
+
+        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'])
+        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()
@@ -66,9 +70,9 @@ class NullBooleanFieldTest(FormFieldAssertionsMixin, SimpleTestCase):
         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'))
+        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"))