1 files changed, 69 insertions, 0 deletions
diff --git a/tests/forms_tests/field_tests/test_nullbooleanfield.py b/tests/forms_tests/field_tests/test_nullbooleanfield.py
new file mode 100644
index 0000000000..74a2d7c173
--- /dev/null
+++ b/tests/forms_tests/field_tests/test_nullbooleanfield.py
@@ -0,0 +1,69 @@
+from __future__ import unicode_literals
+
+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))