Rewrote form widget tests as proper unittests.

This is preparation for landing the template-based widget rendering
patch and goes a long way to making these tests more useful for future
development. The old doctest heritage is strong here.

tests/forms_tests/field_tests/test_datefield.py

+from datetime import date
+
+from django.forms import DateField, Form, HiddenInput, SelectDateWidget
+from django.test import SimpleTestCase, override_settings
+from django.utils import translation
+
+
+class GetDate(Form):
+    mydate = DateField(widget=SelectDateWidget)
+
+
+class DateFieldTest(SimpleTestCase):
+
+    def test_form_field(self):
+        a = GetDate({'mydate_month': '4', 'mydate_day': '1', 'mydate_year': '2008'})
+        self.assertTrue(a.is_valid())
+        self.assertEqual(a.cleaned_data['mydate'], date(2008, 4, 1))
+
+        # As with any widget that implements get_value_from_datadict(), we must
+        # accept the input from the "as_hidden" rendering as well.
+        self.assertHTMLEqual(
+            a['mydate'].as_hidden(),
+            '<input type="hidden" name="mydate" value="2008-4-1" id="id_mydate" />',
+        )
+
+        b = GetDate({'mydate': '2008-4-1'})
+        self.assertTrue(b.is_valid())
+        self.assertEqual(b.cleaned_data['mydate'], date(2008, 4, 1))
+
+        # Invalid dates shouldn't be allowed
+        c = GetDate({'mydate_month': '2', 'mydate_day': '31', 'mydate_year': '2010'})
+        self.assertFalse(c.is_valid())
+        self.assertEqual(c.errors, {'mydate': ['Enter a valid date.']})
+
+        # label tag is correctly associated with month dropdown
+        d = GetDate({'mydate_month': '1', 'mydate_day': '1', 'mydate_year': '2010'})
+        self.assertIn('<label for="id_mydate_month">', d.as_p())
+
+    @override_settings(USE_L10N=True)
+    @translation.override('nl')
+    def test_l10n_date_changed(self):
+        """
+        Ensure that DateField.has_changed() with SelectDateWidget works
+        correctly with a localized date format (#17165).
+        """
+        # With Field.show_hidden_initial=False
+        b = GetDate({
+            'mydate_year': '2008',
+            'mydate_month': '4',
+            'mydate_day': '1',
+        }, initial={'mydate': date(2008, 4, 1)})
+        self.assertFalse(b.has_changed())
+
+        b = GetDate({
+            'mydate_year': '2008',
+            'mydate_month': '4',
+            'mydate_day': '2',
+        }, initial={'mydate': date(2008, 4, 1)})
+        self.assertTrue(b.has_changed())
+
+        # With Field.show_hidden_initial=True
+        class GetDateShowHiddenInitial(Form):
+            mydate = DateField(widget=SelectDateWidget, show_hidden_initial=True)
+
+        b = GetDateShowHiddenInitial({
+            'mydate_year': '2008',
+            'mydate_month': '4',
+            'mydate_day': '1',
+            'initial-mydate': HiddenInput()._format_value(date(2008, 4, 1)),
+        }, initial={'mydate': date(2008, 4, 1)})
+        self.assertFalse(b.has_changed())
+
+        b = GetDateShowHiddenInitial({
+            'mydate_year': '2008',
+            'mydate_month': '4',
+            'mydate_day': '22',
+            'initial-mydate': HiddenInput()._format_value(date(2008, 4, 1)),
+        }, initial={'mydate': date(2008, 4, 1)})
+        self.assertTrue(b.has_changed())
+
+        b = GetDateShowHiddenInitial({
+            'mydate_year': '2008',
+            'mydate_month': '4',
+            'mydate_day': '22',
+            'initial-mydate': HiddenInput()._format_value(date(2008, 4, 1)),
+        }, initial={'mydate': date(2008, 4, 22)})
+        self.assertTrue(b.has_changed())
+
+        b = GetDateShowHiddenInitial({
+            'mydate_year': '2008',
+            'mydate_month': '4',
+            'mydate_day': '22',
+            'initial-mydate': HiddenInput()._format_value(date(2008, 4, 22)),
+        }, initial={'mydate': date(2008, 4, 1)})
+        self.assertFalse(b.has_changed())
+
+    @override_settings(USE_L10N=True)
+    @translation.override('nl')
+    def test_l10n_invalid_date_in(self):
+        # Invalid dates shouldn't be allowed
+        a = GetDate({'mydate_month': '2', 'mydate_day': '31', 'mydate_year': '2010'})
+        self.assertFalse(a.is_valid())
+        # 'Geef een geldige datum op.' = 'Enter a valid date.'
+        self.assertEqual(a.errors, {'mydate': ['Geef een geldige datum op.']})
+
+    @override_settings(USE_L10N=True)
+    @translation.override('nl')
+    def test_form_label_association(self):
+        # label tag is correctly associated with first rendered dropdown
+        a = GetDate({'mydate_month': '1', 'mydate_day': '1', 'mydate_year': '2010'})
+        self.assertIn('<label for="id_mydate_day">', a.as_p())

tests/forms_tests/field_tests/test_multivaluefield.py

+from datetime import datetime
+
+from django.forms import (
+    CharField, Form, MultipleChoiceField, MultiValueField, MultiWidget,
+    SelectMultiple, SplitDateTimeField, SplitDateTimeWidget, TextInput,
+    ValidationError,
+)
+from django.test import SimpleTestCase
+
+beatles = (('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo'))
+
+
+class ComplexMultiWidget(MultiWidget):
+    def __init__(self, attrs=None):
+        widgets = (
+            TextInput(),
+            SelectMultiple(choices=beatles),
+            SplitDateTimeWidget(),
+        )
+        super(ComplexMultiWidget, self).__init__(widgets, attrs)
+
+    def decompress(self, value):
+        if value:
+            data = value.split(',')
+            return [
+                data[0],
+                list(data[1]),
+                datetime.strptime(data[2], "%Y-%m-%d %H:%M:%S"),
+            ]
+        return [None, None, None]
+
+    def format_output(self, rendered_widgets):
+        return '\n'.join(rendered_widgets)
+
+
+class ComplexField(MultiValueField):
+    def __init__(self, required=True, widget=None, label=None, initial=None):
+        fields = (
+            CharField(),
+            MultipleChoiceField(choices=beatles),
+            SplitDateTimeField(),
+        )
+        super(ComplexField, self).__init__(fields, required, widget, label, initial)
+
+    def compress(self, data_list):
+        if data_list:
+            return '%s,%s,%s' % (data_list[0], ''.join(data_list[1]), data_list[2])
+        return None
+
+
+class ComplexFieldForm(Form):
+    field1 = ComplexField(widget=ComplexMultiWidget())
+
+
+class MultiValueFieldTest(SimpleTestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        cls.field = ComplexField(widget=ComplexMultiWidget())
+        super(MultiValueFieldTest, cls).setUpClass()
+
+    def test_clean(self):
+        self.assertEqual(
+            self.field.clean(['some text', ['J', 'P'], ['2007-04-25', '6:24:00']]),
+            'some text,JP,2007-04-25 06:24:00',
+        )
+
+    def test_bad_choice(self):
+        msg = "'Select a valid choice. X is not one of the available choices.'"
+        with self.assertRaisesMessage(ValidationError, msg):
+            self.field.clean(['some text', ['X'], ['2007-04-25', '6:24:00']])
+
+    def test_no_value(self):
+        """
+        If insufficient data is provided, None is substituted.
+        """
+        msg = "'This field is required.'"
+        with self.assertRaisesMessage(ValidationError, msg):
+            self.field.clean(['some text', ['JP']])
+
+    def test_has_changed_no_initial(self):
+        self.assertTrue(self.field.has_changed(
+            None, ['some text', ['J', 'P'], ['2007-04-25', '6:24:00']],
+        ))
+
+    def test_has_changed_same(self):
+        self.assertFalse(self.field.has_changed(
+            'some text,JP,2007-04-25 06:24:00',
+            ['some text', ['J', 'P'], ['2007-04-25', '6:24:00']],
+        ))
+
+    def test_has_changed_first_widget(self):
+        """
+        Test when the first widget's data has changed.
+        """
+        self.assertTrue(self.field.has_changed(
+            'some text,JP,2007-04-25 06:24:00',
+            ['other text', ['J', 'P'], ['2007-04-25', '6:24:00']],
+        ))
+
+    def test_has_changed_last_widget(self):
+        """
+        Test when the last widget's data has changed. This ensures that it is
+        not short circuiting while testing the widgets.
+        """
+        self.assertTrue(self.field.has_changed(
+            'some text,JP,2007-04-25 06:24:00',
+            ['some text', ['J', 'P'], ['2009-04-25', '11:44:00']],
+        ))
+
+    def test_form_as_table(self):
+        form = ComplexFieldForm()
+        self.assertHTMLEqual(
+            form.as_table(),
+            """
+            <tr><th><label for="id_field1_0">Field1:</label></th>
+            <td><input type="text" name="field1_0" id="id_field1_0" />
+            <select multiple="multiple" name="field1_1" id="id_field1_1">
+            <option value="J">John</option>
+            <option value="P">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>
+            <input type="text" name="field1_2_0" id="id_field1_2_0" />
+            <input type="text" name="field1_2_1" id="id_field1_2_1" /></td></tr>
+            """,
+        )
+
+    def test_form_as_table_data(self):
+        form = ComplexFieldForm({
+            'field1_0': 'some text',
+            'field1_1': ['J', 'P'],
+            'field1_2_0': '2007-04-25',
+            'field1_2_1': '06:24:00',
+        })
+        self.assertHTMLEqual(
+            form.as_table(),
+            """
+            <tr><th><label for="id_field1_0">Field1:</label></th>
+            <td><input type="text" name="field1_0" value="some text" id="id_field1_0" />
+            <select multiple="multiple" name="field1_1" id="id_field1_1">
+            <option value="J" selected="selected">John</option>
+            <option value="P" selected="selected">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>
+            <input type="text" name="field1_2_0" value="2007-04-25" id="id_field1_2_0" />
+            <input type="text" name="field1_2_1" value="06:24:00" id="id_field1_2_1" /></td></tr>
+            """,
+        )
+
+    def test_form_cleaned_data(self):
+        form = ComplexFieldForm({
+            'field1_0': 'some text',
+            'field1_1': ['J', 'P'],
+            'field1_2_0': '2007-04-25',
+            'field1_2_1': '06:24:00',
+        })
+        form.is_valid()
+        self.assertEqual(
+            form.cleaned_data['field1'], 'some text,JP,2007-04-25 06:24:00',
+        )

tests/forms_tests/widget_tests/base.py

+from django.test import SimpleTestCase
+
+
+class WidgetTest(SimpleTestCase):
+    beatles = (('J', 'John'), ('P', 'Paul'), ('G', 'George'), ('R', 'Ringo'))
+
+    def check_html(self, widget, name, value, html='', attrs=None, **kwargs):
+        output = widget.render(name, value, attrs=attrs, **kwargs)
+        self.assertHTMLEqual(output, html)

tests/forms_tests/widget_tests/test_checkboxinput.py

+from django.forms import CheckboxInput
+
+from .base import WidgetTest
+
+
+class CheckboxInputTest(WidgetTest):
+    widget = CheckboxInput()
+
+    def test_render_empty(self):
+        self.check_html(self.widget, 'is_cool', '', html='<input type="checkbox" name="is_cool" />')
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'is_cool', None, html='<input type="checkbox" name="is_cool" />')
+
+    def test_render_false(self):
+        self.check_html(self.widget, 'is_cool', False, html='<input type="checkbox" name="is_cool" />')
+
+    def test_render_true(self):
+        self.check_html(
+            self.widget, 'is_cool', True,
+            html='<input checked="checked" type="checkbox" name="is_cool" />'
+        )
+
+    def test_render_value(self):
+        """
+        Using any value that's not in ('', None, False, True) will check the
+        checkbox and set the 'value' attribute.
+        """
+        self.check_html(
+            self.widget, 'is_cool', 'foo',
+            html='<input checked="checked" type="checkbox" name="is_cool" value="foo" />',
+        )
+
+    def test_render_int(self):
+        """
+        Integers are handled by value, not as booleans (#17114).
+        """
+        self.check_html(
+            self.widget, 'is_cool', 0,
+            html='<input checked="checked" type="checkbox" name="is_cool" value="0" />',
+        )
+        self.check_html(
+            self.widget, 'is_cool', 1,
+            html='<input checked="checked" type="checkbox" name="is_cool" value="1" />',
+        )
+
+    def test_render_check_test(self):
+        """
+        You can pass 'check_test' to the constructor. This is a callable that
+        takes the value and returns True if the box should be checked.
+        """
+        widget = CheckboxInput(check_test=lambda value: value.startswith('hello'))
+        self.check_html(widget, 'greeting', '', html=(
+            '<input type="checkbox" name="greeting" />'
+        ))
+        self.check_html(widget, 'greeting', 'hello', html=(
+            '<input checked="checked" type="checkbox" name="greeting" value="hello" />'
+        ))
+        self.check_html(widget, 'greeting', 'hello there', html=(
+            '<input checked="checked" type="checkbox" name="greeting" value="hello there" />'
+        ))
+        self.check_html(widget, 'greeting', 'hello & goodbye', html=(
+            '<input checked="checked" type="checkbox" name="greeting" value="hello &amp; goodbye" />'
+        ))
+
+    def test_render_check_exception(self):
+        """
+        Calling check_test() shouldn't swallow exceptions (#17888).
+        """
+        widget = CheckboxInput(
+            check_test=lambda value: value.startswith('hello'),
+        )
+
+        with self.assertRaises(AttributeError):
+            widget.render('greeting', True)
+
+    def test_value_from_datadict(self):
+        """
+        The CheckboxInput widget will return False if the key is not found in
+        the data dictionary (because HTML form submission doesn't send any
+        result for unchecked checkboxes).
+        """
+        self.assertFalse(self.widget.value_from_datadict({}, {}, 'testing'))
+
+    def test_value_from_datadict_string_int(self):
+        value = self.widget.value_from_datadict({'testing': '0'}, {}, 'testing')
+        self.assertEqual(value, True)

tests/forms_tests/widget_tests/test_checkboxselectmultiple.py

+from django.forms import CheckboxSelectMultiple
+
+from .base import WidgetTest
+
+
+class CheckboxSelectMultipleTest(WidgetTest):
+    widget = CheckboxSelectMultiple()
+
+    def test_render_value(self):
+        self.check_html(self.widget, 'beatles', ['J'], choices=self.beatles, html=(
+            """<ul>
+            <li><label><input checked="checked" type="checkbox" name="beatles" value="J" /> John</label></li>
+            <li><label><input type="checkbox" name="beatles" value="P" /> Paul</label></li>
+            <li><label><input type="checkbox" name="beatles" value="G" /> George</label></li>
+            <li><label><input type="checkbox" name="beatles" value="R" /> Ringo</label></li>
+            </ul>"""
+        ))
+
+    def test_render_value_multiple(self):
+        self.check_html(self.widget, 'beatles', ['J', 'P'], choices=self.beatles, html=(
+            """<ul>
+            <li><label><input checked="checked" type="checkbox" name="beatles" value="J" /> John</label></li>
+            <li><label><input checked="checked" type="checkbox" name="beatles" value="P" /> Paul</label></li>
+            <li><label><input type="checkbox" name="beatles" value="G" /> George</label></li>
+            <li><label><input type="checkbox" name="beatles" value="R" /> Ringo</label></li>
+            </ul>"""
+        ))
+
+    def test_render_none(self):
+        """
+        If the value is None, none of the options are selected.
+        """
+        self.check_html(self.widget, 'beatles', None, choices=self.beatles, html=(
+            """<ul>
+            <li><label><input type="checkbox" name="beatles" value="J" /> John</label></li>
+            <li><label><input type="checkbox" name="beatles" value="P" /> Paul</label></li>
+            <li><label><input type="checkbox" name="beatles" value="G" /> George</label></li>
+            <li><label><input type="checkbox" name="beatles" value="R" /> Ringo</label></li>
+            </ul>"""
+        ))
+
+    def test_nested_choices(self):
+        nested_choices = (
+            ('unknown', 'Unknown'),
+            ('Audio', (('vinyl', 'Vinyl'), ('cd', 'CD'))),
+            ('Video', (('vhs', 'VHS'), ('dvd', 'DVD'))),
+        )
+        html = """
+        <ul id="media">
+        <li>
+        <label for="media_0"><input id="media_0" name="nestchoice" type="checkbox" value="unknown" /> Unknown</label>
+        </li>
+        <li>Audio<ul id="media_1">
+        <li>
+        <label for="media_1_0">
+        <input checked="checked" id="media_1_0" name="nestchoice" type="checkbox" value="vinyl" /> Vinyl
+        </label>
+        </li>
+        <li>
+        <label for="media_1_1"><input id="media_1_1" name="nestchoice" type="checkbox" value="cd" /> CD</label>
+        </li>
+        </ul></li>
+        <li>Video<ul id="media_2">
+        <li>
+        <label for="media_2_0"><input id="media_2_0" name="nestchoice" type="checkbox" value="vhs" /> VHS</label>
+        </li>
+        <li>
+        <label for="media_2_1">
+        <input checked="checked" id="media_2_1" name="nestchoice" type="checkbox" value="dvd" /> DVD
+        </label>
+        </li>
+        </ul></li>
+        </ul>
+        """
+        self.check_html(
+            self.widget, 'nestchoice', ('vinyl', 'dvd'),
+            choices=nested_choices, attrs={'id': 'media'}, html=html,
+        )
+
+    def test_separate_ids(self):
+        """
+        Each input gets a separate ID.
+        """
+        choices = [('a', 'A'), ('b', 'B'), ('c', 'C')]
+        html = """
+        <ul id="abc">
+        <li>
+        <label for="abc_0"><input checked="checked" type="checkbox" name="letters" value="a" id="abc_0" /> A</label>
+        </li>
+        <li><label for="abc_1"><input type="checkbox" name="letters" value="b" id="abc_1" /> B</label></li>
+        <li>
+        <label for="abc_2"><input checked="checked" type="checkbox" name="letters" value="c" id="abc_2" /> C</label>
+        </li>
+        </ul>
+        """
+        self.check_html(self.widget, 'letters', ['a', 'c'], choices=choices, attrs={'id': 'abc'}, html=html)
+
+    def test_separate_ids_constructor(self):
+        """
+        Each input gets a separate ID when the ID is passed to the constructor.
+        """
+        widget = CheckboxSelectMultiple(attrs={'id': 'abc'})
+        choices = [('a', 'A'), ('b', 'B'), ('c', 'C')]
+        html = """
+        <ul id="abc">
+        <li>
+        <label for="abc_0"><input checked="checked" type="checkbox" name="letters" value="a" id="abc_0" /> A</label>
+        </li>
+        <li><label for="abc_1"><input type="checkbox" name="letters" value="b" id="abc_1" /> B</label></li>
+        <li>
+        <label for="abc_2"><input checked="checked" type="checkbox" name="letters" value="c" id="abc_2" /> C</label>
+        </li>
+        </ul>
+        """
+        self.check_html(widget, 'letters', ['a', 'c'], choices=choices, html=html)

tests/forms_tests/widget_tests/test_clearablefileinput.py

+from django.core.files.uploadedfile import SimpleUploadedFile
+from django.forms import ClearableFileInput
+from django.utils import six
+from django.utils.encoding import python_2_unicode_compatible
+
+from .base import WidgetTest
+
+
+@python_2_unicode_compatible
+class FakeFieldFile(object):
+    """
+    Quacks like a FieldFile (has a .url and unicode representation), but
+    doesn't require us to care about storages etc.
+    """
+    url = 'something'
+
+    def __str__(self):
+        return self.url
+
+
+class ClearableFileInputTest(WidgetTest):
+    widget = ClearableFileInput()
+
+    def test_clear_input_renders(self):
+        """
+        A ClearableFileInput with is_required False and rendered with an
+        initial value that is a file renders a clear checkbox.
+        """
+        self.check_html(self.widget, 'myfile', FakeFieldFile(), html=(
+            """
+            Currently: <a href="something">something</a>
+            <input type="checkbox" name="myfile-clear" id="myfile-clear_id" />
+            <label for="myfile-clear_id">Clear</label><br />
+            Change: <input type="file" name="myfile" />
+            """
+        ))
+
+    def test_html_escaped(self):
+        """
+        A ClearableFileInput should escape name, filename, and URL
+        when rendering HTML (#15182).
+        """
+        @python_2_unicode_compatible
+        class StrangeFieldFile(object):
+            url = "something?chapter=1&sect=2&copy=3&lang=en"
+
+            def __str__(self):
+                return '''something<div onclick="alert('oops')">.jpg'''
+
+        widget = ClearableFileInput()
+        field = StrangeFieldFile()
+        output = widget.render('my<div>file', field)
+        self.assertNotIn(field.url, output)
+        self.assertIn('href="something?chapter=1&amp;sect=2&amp;copy=3&amp;lang=en"', output)
+        self.assertNotIn(six.text_type(field), output)
+        self.assertIn('something&lt;div onclick=&quot;alert(&#39;oops&#39;)&quot;&gt;.jpg', output)
+        self.assertIn('my&lt;div&gt;file', output)
+        self.assertNotIn('my<div>file', output)
+
+    def test_html_does_not_mask_exceptions(self):
+        """
+        A ClearableFileInput should not mask exceptions produced while
+        checking that it has a value.
+        """
+        @python_2_unicode_compatible
+        class FailingURLFieldFile(object):
+            @property
+            def url(self):
+                raise RuntimeError('Canary')
+
+            def __str__(self):
+                return 'value'
+
+        widget = ClearableFileInput()
+        field = FailingURLFieldFile()
+        with self.assertRaisesMessage(RuntimeError, 'Canary'):
+            widget.render('myfile', field)
+
+    def test_clear_input_renders_only_if_not_required(self):
+        """
+        A ClearableFileInput with is_required=False does not render a clear
+        checkbox.
+        """
+        widget = ClearableFileInput()
+        widget.is_required = True
+        self.check_html(widget, 'myfile', FakeFieldFile(), html=(
+            """
+            Currently: <a href="something">something</a> <br />
+            Change: <input type="file" name="myfile" />
+            """
+        ))
+
+    def test_clear_input_renders_only_if_initial(self):
+        """
+        A ClearableFileInput instantiated with no initial value does not render
+        a clear checkbox.
+        """
+        self.check_html(self.widget, 'myfile', None, html='<input type="file" name="myfile" />')
+
+    def test_clear_input_checked_returns_false(self):
+        """
+        ClearableFileInput.value_from_datadict returns False if the clear
+        checkbox is checked, if not required.
+        """
+        value = self.widget.value_from_datadict(
+            data={'myfile-clear': True},
+            files={},
+            name='myfile',
+        )
+        self.assertEqual(value, False)
+
+    def test_clear_input_checked_returns_false_only_if_not_required(self):
+        """
+        ClearableFileInput.value_from_datadict never returns False if the field
+        is required.
+        """
+        widget = ClearableFileInput()
+        widget.is_required = True
+        field = SimpleUploadedFile('something.txt', b'content')
+
+        value = widget.value_from_datadict(
+            data={'myfile-clear': True},
+            files={'myfile': field},
+            name='myfile',
+        )
+        self.assertEqual(value, field)

tests/forms_tests/widget_tests/test_dateinput.py

+from datetime import date
+
+from django.forms import DateInput
+from django.test import override_settings
+from django.utils import translation
+
+from .base import WidgetTest
+
+
+class DateInputTest(WidgetTest):
+    widget = DateInput()
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'date', None, html='<input type="text" name="date" />')
+
+    def test_render_value(self):
+        d = date(2007, 9, 17)
+        self.assertEqual(str(d), '2007-09-17')
+
+        self.check_html(self.widget, 'date', d, html='<input type="text" name="date" value="2007-09-17" />')
+        self.check_html(self.widget, 'date', date(2007, 9, 17), html=(
+            '<input type="text" name="date" value="2007-09-17" />'
+        ))
+
+    def test_string(self):
+        """
+        Should be able to initialize from a string value.
+        """
+        self.check_html(self.widget, 'date', '2007-09-17', html=(
+            '<input type="text" name="date" value="2007-09-17" />'
+        ))
+
+    def test_format(self):
+        """
+        Use 'format' to change the way a value is displayed.
+        """
+        d = date(2007, 9, 17)
+        widget = DateInput(format='%d/%m/%Y', attrs={'type': 'date'})
+        self.check_html(widget, 'date', d, html='<input type="date" name="date" value="17/09/2007" />')
+
+    @override_settings(USE_L10N=True)
+    @translation.override('de-at')
+    def test_l10n(self):
+        self.check_html(
+            self.widget, 'date', date(2007, 9, 17),
+            html='<input type="text" name="date" value="17.09.2007" />',
+        )

tests/forms_tests/widget_tests/test_datetimeinput.py

+from datetime import datetime
+
+from django.forms import DateTimeInput
+from django.test import override_settings
+from django.utils import translation
+
+from .base import WidgetTest
+
+
+class DateTimeInputTest(WidgetTest):
+    widget = DateTimeInput()
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'date', None, '<input type="text" name="date" />')
+
+    def test_render_value(self):
+        """
+        The microseconds are trimmed on display, by default.
+        """
+        d = datetime(2007, 9, 17, 12, 51, 34, 482548)
+        self.assertEqual(str(d), '2007-09-17 12:51:34.482548')
+        self.check_html(self.widget, 'date', d, html=(
+            '<input type="text" name="date" value="2007-09-17 12:51:34" />'
+        ))
+        self.check_html(self.widget, 'date', datetime(2007, 9, 17, 12, 51, 34), html=(
+            '<input type="text" name="date" value="2007-09-17 12:51:34" />'
+        ))
+        self.check_html(self.widget, 'date', datetime(2007, 9, 17, 12, 51), html=(
+            '<input type="text" name="date" value="2007-09-17 12:51:00" />'
+        ))
+
+    def test_render_formatted(self):
+        """
+        Use 'format' to change the way a value is displayed.
+        """
+        widget = DateTimeInput(
+            format='%d/%m/%Y %H:%M', attrs={'type': 'datetime'},
+        )
+        d = datetime(2007, 9, 17, 12, 51, 34, 482548)
+        self.check_html(widget, 'date', d, html='<input type="datetime" name="date" value="17/09/2007 12:51" />')
+
+    @override_settings(USE_L10N=True)
+    @translation.override('de-at')
+    def test_l10n(self):
+        d = datetime(2007, 9, 17, 12, 51, 34, 482548)
+        self.check_html(self.widget, 'date', d, html=(
+            '<input type="text" name="date" value="17.09.2007 12:51:34" />'
+        ))
+
+    @override_settings(USE_L10N=True)
+    @translation.override('de-at')
+    def test_locale_aware(self):
+        d = datetime(2007, 9, 17, 12, 51, 34, 482548)
+        with self.settings(USE_L10N=False):
+            self.check_html(
+                self.widget, 'date', d,
+                html='<input type="text" name="date" value="2007-09-17 12:51:34" />',
+            )
+        with translation.override('es'):
+            self.check_html(
+                self.widget, 'date', d,
+                html='<input type="text" name="date" value="17/09/2007 12:51:34" />',
+            )

tests/forms_tests/widget_tests/test_fileinput.py

+from django.forms import FileInput
+
+from .base import WidgetTest
+
+
+class FileInputTest(WidgetTest):
+    widget = FileInput()
+
+    def test_render(self):
+        """
+        FileInput widgets never render the value attribute. The old value
+        isn't useful if a form is updated or an error occurred.
+        """
+        self.check_html(self.widget, 'email', 'test@example.com', html='<input type="file" name="email" />')
+        self.check_html(self.widget, 'email', '', html='<input type="file" name="email" />')
+        self.check_html(self.widget, 'email', None, html='<input type="file" name="email" />')

tests/forms_tests/widget_tests/test_hiddeninput.py

+from django.forms import HiddenInput
+
+from .base import WidgetTest
+
+
+class HiddenInputTest(WidgetTest):
+    widget = HiddenInput()
+
+    def test_render(self):
+        self.check_html(self.widget, 'email', '', html='<input type="hidden" name="email" />')

tests/forms_tests/widget_tests/test_multiplehiddeninput.py

+from django.forms import MultipleHiddenInput
+
+from .base import WidgetTest
+
+
+class MultipleHiddenInputTest(WidgetTest):
+    widget = MultipleHiddenInput()
+
+    def test_render_single(self):
+        self.check_html(
+            self.widget, 'email', ['test@example.com'],
+            html='<input type="hidden" name="email" value="test@example.com" />',
+        )
+
+    def test_render_multiple(self):
+        self.check_html(
+            self.widget, 'email', ['test@example.com', 'foo@example.com'],
+            html=(
+                '<input type="hidden" name="email" value="test@example.com" />\n'
+                '<input type="hidden" name="email" value="foo@example.com" />'
+            ),
+        )
+
+    def test_render_attrs(self):
+        self.check_html(
+            self.widget, 'email', ['test@example.com'], attrs={'class': 'fun'},
+            html='<input type="hidden" name="email" value="test@example.com" class="fun" />',
+        )
+
+    def test_render_attrs_multiple(self):
+        self.check_html(
+            self.widget, 'email', ['test@example.com', 'foo@example.com'], attrs={'class': 'fun'},
+            html=(
+                '<input type="hidden" name="email" value="test@example.com" class="fun" />\n'
+                '<input type="hidden" name="email" value="foo@example.com" class="fun" />'
+            ),
+        )
+
+    def test_render_attrs_constructor(self):
+        widget = MultipleHiddenInput(attrs={'class': 'fun'})
+        self.check_html(widget, 'email', [], '')
+        self.check_html(
+            widget, 'email', ['foo@example.com'],
+            html='<input type="hidden" class="fun" value="foo@example.com" name="email" />',
+        )
+        self.check_html(
+            widget, 'email', ['foo@example.com', 'test@example.com'],
+            html=(
+                '<input type="hidden" class="fun" value="foo@example.com" name="email" />\n'
+                '<input type="hidden" class="fun" value="test@example.com" name="email" />'
+            ),
+        )
+        self.check_html(
+            widget, 'email', ['foo@example.com'], attrs={'class': 'special'},
+            html='<input type="hidden" class="special" value="foo@example.com" name="email" />',
+        )
+
+    def test_render_empty(self):
+        self.check_html(self.widget, 'email', [], '')
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'email', None, '')
+
+    def test_render_increment_id(self):
+        """
+        Each input should get a separate ID.
+        """
+        self.check_html(
+            self.widget, 'letters', ['a', 'b', 'c'], attrs={'id': 'hideme'},
+            html=(
+                '<input type="hidden" name="letters" value="a" id="hideme_0" />\n'
+                '<input type="hidden" name="letters" value="b" id="hideme_1" />\n'
+                '<input type="hidden" name="letters" value="c" id="hideme_2" />'
+            ),
+        )

tests/forms_tests/widget_tests/test_multiwidget.py

+import copy
+from datetime import datetime
+
+from django.forms import (
+    CharField, FileInput, MultipleChoiceField, MultiValueField, MultiWidget,
+    RadioSelect, SelectMultiple, SplitDateTimeField, SplitDateTimeWidget,
+    TextInput,
+)
+
+from .base import WidgetTest
+
+
+class MyMultiWidget(MultiWidget):
+    def decompress(self, value):
+        if value:
+            return value.split('__')
+        return ['', '']
+
+
+class ComplexMultiWidget(MultiWidget):
+    def __init__(self, attrs=None):
+        widgets = (
+            TextInput(),
+            SelectMultiple(choices=WidgetTest.beatles),
+            SplitDateTimeWidget(),
+        )
+        super(ComplexMultiWidget, self).__init__(widgets, attrs)
+
+    def decompress(self, value):
+        if value:
+            data = value.split(',')
+            return [
+                data[0], list(data[1]), datetime.strptime(data[2], "%Y-%m-%d %H:%M:%S")
+            ]
+        return [None, None, None]
+
+    def format_output(self, rendered_widgets):
+        return '\n'.join(rendered_widgets)
+
+
+class ComplexField(MultiValueField):
+    def __init__(self, required=True, widget=None, label=None, initial=None):
+        fields = (
+            CharField(),
+            MultipleChoiceField(choices=WidgetTest.beatles),
+            SplitDateTimeField(),
+        )
+        super(ComplexField, self).__init__(
+            fields, required, widget, label, initial,
+        )
+
+    def compress(self, data_list):
+        if data_list:
+            return '%s,%s,%s' % (
+                data_list[0], ''.join(data_list[1]), data_list[2],
+            )
+        return None
+
+
+class DeepCopyWidget(MultiWidget):
+    """
+    Used to test MultiWidget.__deepcopy__().
+    """
+    def __init__(self, choices=[]):
+        widgets = [
+            RadioSelect(choices=choices),
+            TextInput,
+        ]
+        super(DeepCopyWidget, self).__init__(widgets)
+
+    def _set_choices(self, choices):
+        """
+        When choices are set for this widget, we want to pass those along to
+        the Select widget.
+        """
+        self.widgets[0].choices = choices
+
+    def _get_choices(self):
+        """
+        The choices for this widget are the Select widget's choices.
+        """
+        return self.widgets[0].choices
+    choices = property(_get_choices, _set_choices)
+
+
+class MultiWidgetTest(WidgetTest):
+
+    def test_text_inputs(self):
+        widget = MyMultiWidget(
+            widgets=(
+                TextInput(attrs={'class': 'big'}),
+                TextInput(attrs={'class': 'small'}),
+            )
+        )
+        self.check_html(widget, 'name', ['john', 'lennon'], html=(
+            '<input type="text" class="big" value="john" name="name_0" />'
+            '<input type="text" class="small" value="lennon" name="name_1" />'
+        ))
+        self.check_html(widget, 'name', 'john__lennon', html=(
+            '<input type="text" class="big" value="john" name="name_0" />'
+            '<input type="text" class="small" value="lennon" name="name_1" />'
+        ))
+        self.check_html(widget, 'name', 'john__lennon', attrs={'id': 'foo'}, html=(
+            '<input id="foo_0" type="text" class="big" value="john" name="name_0" />'
+            '<input id="foo_1" type="text" class="small" value="lennon" name="name_1" />'
+        ))
+
+    def test_constructor_attrs(self):
+        widget = MyMultiWidget(
+            widgets=(
+                TextInput(attrs={'class': 'big'}),
+                TextInput(attrs={'class': 'small'}),
+            ),
+            attrs={'id': 'bar'},
+        )
+        self.check_html(widget, 'name', ['john', 'lennon'], html=(
+            '<input id="bar_0" type="text" class="big" value="john" name="name_0" />'
+            '<input id="bar_1" type="text" class="small" value="lennon" name="name_1" />'
+        ))
+
+    def test_needs_multipart_true(self):
+        """
+        needs_multipart_form should be True if any widgets need it.
+        """
+        widget = MyMultiWidget(widgets=(TextInput(), FileInput()))
+        self.assertTrue(widget.needs_multipart_form)
+
+    def test_needs_multipart_false(self):
+        """
+        needs_multipart_form should be False if no widgets need it.
+        """
+        widget = MyMultiWidget(widgets=(TextInput(), TextInput()))
+        self.assertFalse(widget.needs_multipart_form)
+
+    def test_nested_multiwidget(self):
+        """
+        MultiWidgets can be composed of other MultiWidgets.
+        """
+        widget = ComplexMultiWidget()
+        self.check_html(widget, 'name', 'some text,JP,2007-04-25 06:24:00', html=(
+            """
+            <input type="text" name="name_0" value="some text" />
+            <select multiple="multiple" name="name_1">
+                <option value="J" selected="selected">John</option>
+                <option value="P" selected="selected">Paul</option>
+                <option value="G">George</option>
+                <option value="R">Ringo</option>
+            </select>
+            <input type="text" name="name_2_0" value="2007-04-25" />
+            <input type="text" name="name_2_1" value="06:24:00" />
+            """
+        ))
+
+    def test_deepcopy(self):
+        """
+        MultiWidget should define __deepcopy__() (#12048).
+        """
+        w1 = DeepCopyWidget(choices=[1, 2, 3])
+        w2 = copy.deepcopy(w1)
+        w2.choices = [4, 5, 6]
+        # w2 ought to be independent of w1, since MultiWidget ought
+        # to make a copy of its sub-widgets when it is copied.
+        self.assertEqual(w1.choices, [1, 2, 3])

tests/forms_tests/widget_tests/test_nullbooleanselect.py

+from django.forms import NullBooleanSelect
+from django.test import override_settings
+from django.utils import translation
+
+from .base import WidgetTest
+
+
+class NullBooleanSelectTest(WidgetTest):
+    widget = NullBooleanSelect()
+
+    def test_render_true(self):
+        self.check_html(self.widget, 'is_cool', True, html=(
+            """<select name="is_cool">
+            <option value="1">Unknown</option>
+            <option value="2" selected="selected">Yes</option>
+            <option value="3">No</option>
+            </select>"""
+        ))
+
+    def test_render_false(self):
+        self.check_html(self.widget, 'is_cool', False, html=(
+            """<select name="is_cool">
+            <option value="1">Unknown</option>
+            <option value="2">Yes</option>
+            <option value="3" selected="selected">No</option>
+            </select>"""
+        ))
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'is_cool', None, html=(
+            """<select name="is_cool">
+            <option value="1" selected="selected">Unknown</option>
+            <option value="2">Yes</option>
+            <option value="3">No</option>
+            </select>"""
+        ))
+
+    def test_render_value(self):
+        self.check_html(self.widget, 'is_cool', '2', html=(
+            """<select name="is_cool">
+            <option value="1">Unknown</option>
+            <option value="2" selected="selected">Yes</option>
+            <option value="3">No</option>
+            </select>"""
+        ))
+
+    @override_settings(USE_L10N=True)
+    def test_l10n(self):
+        """
+        Ensure that the NullBooleanSelect widget's options are lazily
+        localized (#17190).
+        """
+        widget = NullBooleanSelect()
+
+        with translation.override('de-at'):
+            self.check_html(widget, 'id_bool', True, html=(
+                """
+                <select name="id_bool">
+                    <option value="1">Unbekannt</option>
+                    <option value="2" selected="selected">Ja</option>
+                    <option value="3">Nein</option>
+                </select>
+                """
+            ))

tests/forms_tests/widget_tests/test_passwordinput.py

+from django.forms import PasswordInput
+
+from .base import WidgetTest
+
+
+class PasswordInputTest(WidgetTest):
+    widget = PasswordInput()
+
+    def test_render(self):
+        self.check_html(self.widget, 'password', '', html='<input type="password" name="password" />')
+
+    def test_render_ignore_value(self):
+        self.check_html(self.widget, 'password', 'secret', html='<input type="password" name="password" />')
+
+    def test_render_value_true(self):
+        """
+        The render_value argument lets you specify whether the widget should
+        render its value. For security reasons, this is off by default.
+        """
+        widget = PasswordInput(render_value=True)
+        self.check_html(widget, 'password', '', html='<input type="password" name="password" />')
+        self.check_html(widget, 'password', None, html='<input type="password" name="password" />')
+        self.check_html(
+            widget, 'password', 'test@example.com',
+            html='<input type="password" name="password" value="test@example.com" />',
+        )

tests/forms_tests/widget_tests/test_radioselect.py

+from django.forms import RadioSelect
+
+from .base import WidgetTest
+
+
+class RadioSelectTest(WidgetTest):
+    widget = RadioSelect()
+
+    def test_render(self):
+        self.check_html(self.widget, 'beatle', 'J', choices=self.beatles, html=(
+            """<ul>
+            <li><label><input checked="checked" type="radio" name="beatle" value="J" /> John</label></li>
+            <li><label><input type="radio" name="beatle" value="P" /> Paul</label></li>
+            <li><label><input type="radio" name="beatle" value="G" /> George</label></li>
+            <li><label><input type="radio" name="beatle" value="R" /> Ringo</label></li>
+            </ul>"""
+        ))
+
+    def test_nested_choices(self):
+        nested_choices = (
+            ('unknown', 'Unknown'),
+            ('Audio', (('vinyl', 'Vinyl'), ('cd', 'CD'))),
+            ('Video', (('vhs', 'VHS'), ('dvd', 'DVD'))),
+        )
+        html = """
+        <ul id="media">
+        <li>
+        <label for="media_0"><input id="media_0" name="nestchoice" type="radio" value="unknown" /> Unknown</label>
+        </li>
+        <li>Audio<ul id="media_1">
+        <li>
+        <label for="media_1_0"><input id="media_1_0" name="nestchoice" type="radio" value="vinyl" /> Vinyl</label>
+        </li>
+        <li><label for="media_1_1"><input id="media_1_1" name="nestchoice" type="radio" value="cd" /> CD</label></li>
+        </ul></li>
+        <li>Video<ul id="media_2">
+        <li><label for="media_2_0"><input id="media_2_0" name="nestchoice" type="radio" value="vhs" /> VHS</label></li>
+        <li>
+        <label for="media_2_1">
+        <input checked="checked" id="media_2_1" name="nestchoice" type="radio" value="dvd" /> DVD
+        </label>
+        </li>
+        </ul></li>
+        </ul>
+        """
+        self.check_html(
+            self.widget, 'nestchoice', 'dvd', choices=nested_choices,
+            attrs={'id': 'media'}, html=html,
+        )
+
+    def test_constructor_attrs(self):
+        """
+        Attributes provided at instantiation are passed to the constituent
+        inputs.
+        """
+        widget = RadioSelect(attrs={'id': 'foo'})
+        html = """
+        <ul id="foo">
+        <li>
+        <label for="foo_0"><input checked="checked" type="radio" id="foo_0" value="J" name="beatle" /> John</label>
+        </li>
+        <li><label for="foo_1"><input type="radio" id="foo_1" value="P" name="beatle" /> Paul</label></li>
+        <li><label for="foo_2"><input type="radio" id="foo_2" value="G" name="beatle" /> George</label></li>
+        <li><label for="foo_3"><input type="radio" id="foo_3" value="R" name="beatle" /> Ringo</label></li>
+        </ul>
+        """
+        self.check_html(widget, 'beatle', 'J', choices=self.beatles, html=html)
+
+    def test_render_attrs(self):
+        """
+        Attributes provided at render-time are passed to the constituent
+        inputs.
+        """
+        html = """
+        <ul id="bar">
+        <li>
+        <label for="bar_0"><input checked="checked" type="radio" id="bar_0" value="J" name="beatle" /> John</label>
+        </li>
+        <li><label for="bar_1"><input type="radio" id="bar_1" value="P" name="beatle" /> Paul</label></li>
+        <li><label for="bar_2"><input type="radio" id="bar_2" value="G" name="beatle" /> George</label></li>
+        <li><label for="bar_3"><input type="radio" id="bar_3" value="R" name="beatle" /> Ringo</label></li>
+        </ul>
+        """
+        self.check_html(self.widget, 'beatle', 'J', choices=self.beatles, attrs={'id': 'bar'}, html=html)

tests/forms_tests/widget_tests/test_select.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+import copy
+
+from django.forms import Select
+from django.utils.safestring import mark_safe
+
+from .base import WidgetTest
+
+
+class SelectTest(WidgetTest):
+    widget = Select()
+    nested_widget = Select(choices=(
+        ('outer1', 'Outer 1'),
+        ('Group "1"', (('inner1', 'Inner 1'), ('inner2', 'Inner 2'))),
+    ))
+
+    def test_render(self):
+        self.check_html(self.widget, 'beatle', 'J', choices=self.beatles, html=(
+            """<select name="beatle">
+            <option value="J" selected="selected">John</option>
+            <option value="P">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>"""
+        ))
+
+    def test_render_none(self):
+        """
+        If the value is None, none of the options are selected.
+        """
+        self.check_html(self.widget, 'beatle', None, choices=self.beatles, html=(
+            """<select name="beatle">
+            <option value="J">John</option>
+            <option value="P">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>"""
+        ))
+
+    def test_render_label_value(self):
+        """
+        If the value corresponds to a label (but not to an option value), none
+        of the options are selected.
+        """
+        self.check_html(self.widget, 'beatle', 'John', choices=self.beatles, html=(
+            """<select name="beatle">
+            <option value="J">John</option>
+            <option value="P">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>"""
+        ))
+
+    def test_render_selected(self):
+        """
+        Only one option can be selected (#8103).
+        """
+        choices = [('0', '0'), ('1', '1'), ('2', '2'), ('3', '3'), ('0', 'extra')]
+
+        self.check_html(self.widget, 'choices', '0', choices=choices, html=(
+            """<select name="choices">
+            <option value="0" selected="selected">0</option>
+            <option value="1">1</option>
+            <option value="2">2</option>
+            <option value="3">3</option>
+            <option value="0">extra</option>
+            </select>"""
+        ))
+
+    def test_constructor_attrs(self):
+        """
+        Select options shouldn't inherit the parent widget attrs.
+        """
+        widget = Select(
+            attrs={'class': 'super', 'id': 'super'},
+            choices=[(1, 1), (2, 2), (3, 3)],
+        )
+        self.check_html(widget, 'num', 2, html=(
+            """<select name="num" class="super" id="super">
+              <option value="1">1</option>
+              <option value="2" selected="selected">2</option>
+              <option value="3">3</option>
+            </select>"""
+        ))
+
+    def test_compare_to_str(self):
+        """
+        The value is compared to its str().
+        """
+        self.check_html(
+            self.widget, 'num', 2,
+            choices=[('1', '1'), ('2', '2'), ('3', '3')],
+            html=(
+                """<select name="num">
+                <option value="1">1</option>
+                <option value="2" selected="selected">2</option>
+                <option value="3">3</option>
+                </select>"""
+            ),
+        )
+        self.check_html(
+            self.widget, 'num', '2',
+            choices=[(1, 1), (2, 2), (3, 3)],
+            html=(
+                """<select name="num">
+                <option value="1">1</option>
+                <option value="2" selected="selected">2</option>
+                <option value="3">3</option>
+                </select>"""
+            ),
+        )
+        self.check_html(
+            self.widget, 'num', 2,
+            choices=[(1, 1), (2, 2), (3, 3)],
+            html=(
+                """<select name="num">
+                <option value="1">1</option>
+                <option value="2" selected="selected">2</option>
+                <option value="3">3</option>
+                </select>"""
+            ),
+        )
+
+    def test_choices_constuctor(self):
+        widget = Select(choices=[(1, 1), (2, 2), (3, 3)])
+        self.check_html(widget, 'num', 2, html=(
+            """<select name="num">
+            <option value="1">1</option>
+            <option value="2" selected="selected">2</option>
+            <option value="3">3</option>
+            </select>"""
+        ))
+
+    def test_choices_constructor_generator(self):
+        """
+        If choices is passed to the constructor and is a generator, it can be
+        iterated over multiple times without getting consumed.
+        """
+        def get_choices():
+            for i in range(5):
+                yield (i, i)
+
+        widget = Select(choices=get_choices())
+        self.check_html(widget, 'num', 2, html=(
+            """<select name="num">
+            <option value="0">0</option>
+            <option value="1">1</option>
+            <option value="2" selected="selected">2</option>
+            <option value="3">3</option>
+            <option value="4">4</option>
+            </select>"""
+        ))
+        self.check_html(widget, 'num', 3, html=(
+            """<select name="num">
+            <option value="0">0</option>
+            <option value="1">1</option>
+            <option value="2">2</option>
+            <option value="3" selected="selected">3</option>
+            <option value="4">4</option>
+            </select>"""
+        ))
+
+    def test_choices_constuctor_and_render(self):
+        """
+        If 'choices' is passed to both the constructor and render(), then
+        they'll both be in the output.
+        """
+        widget = Select(choices=[(1, 1), (2, 2), (3, 3)])
+        self.check_html(widget, 'num', 2, choices=[(4, 4), (5, 5)], html=(
+            """<select name="num">
+            <option value="1">1</option>
+            <option value="2" selected="selected">2</option>
+            <option value="3">3</option>
+            <option value="4">4</option>
+            <option value="5">5</option>
+            </select>"""
+        ))
+
+    def test_choices_escaping(self):
+        choices = (('bad', 'you & me'), ('good', mark_safe('you &gt; me')))
+        self.check_html(self.widget, 'escape', None, choices=choices, html=(
+            """<select name="escape">
+            <option value="bad">you &amp; me</option>
+            <option value="good">you &gt; me</option>
+            </select>"""
+        ))
+
+    def test_choices_unicode(self):
+        self.check_html(
+            self.widget, 'email', 'ŠĐĆŽćžšđ',
+            choices=[('ŠĐĆŽćžšđ', 'ŠĐabcĆŽćžšđ'), ('ćžšđ', 'abcćžšđ')],
+            html=(
+                """<select name="email">
+                <option value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" selected="selected">
+                    \u0160\u0110abc\u0106\u017d\u0107\u017e\u0161\u0111
+                </option>
+                <option value="\u0107\u017e\u0161\u0111">abc\u0107\u017e\u0161\u0111</option>
+                </select>"""
+            ),
+        )
+
+    def test_choices_optgroup(self):
+        """
+        Choices can be nested one level in order to create HTML optgroups.
+        """
+        self.check_html(self.nested_widget, 'nestchoice', None, html=(
+            """<select name="nestchoice">
+            <option value="outer1">Outer 1</option>
+            <optgroup label="Group &quot;1&quot;">
+            <option value="inner1">Inner 1</option>
+            <option value="inner2">Inner 2</option>
+            </optgroup>
+            </select>"""
+        ))
+
+    def test_choices_select_outer(self):
+        self.check_html(self.nested_widget, 'nestchoice', 'outer1', html=(
+            """<select name="nestchoice">
+            <option value="outer1" selected="selected">Outer 1</option>
+            <optgroup label="Group &quot;1&quot;">
+            <option value="inner1">Inner 1</option>
+            <option value="inner2">Inner 2</option>
+            </optgroup>
+            </select>"""
+        ))
+
+    def test_choices_select_inner(self):
+        self.check_html(self.nested_widget, 'nestchoice', 'inner1', html=(
+            """<select name="nestchoice">
+            <option value="outer1">Outer 1</option>
+            <optgroup label="Group &quot;1&quot;">
+            <option value="inner1" selected="selected">Inner 1</option>
+            <option value="inner2">Inner 2</option>
+            </optgroup>
+            </select>"""
+        ))
+
+    def test_deepcopy(self):
+        """
+        __deepcopy__() should copy all attributes properly (#25085).
+        """
+        widget = Select()
+        obj = copy.deepcopy(widget)
+        self.assertIsNot(widget, obj)
+        self.assertEqual(widget.choices, obj.choices)
+        self.assertIsNot(widget.choices, obj.choices)
+        self.assertEqual(widget.attrs, obj.attrs)
+        self.assertIsNot(widget.attrs, obj.attrs)

tests/forms_tests/widget_tests/test_selectmultiple.py

+from django.forms import SelectMultiple
+
+from .base import WidgetTest
+
+
+class SelectMultipleTest(WidgetTest):
+    widget = SelectMultiple()
+    numeric_choices = (('0', '0'), ('1', '1'), ('2', '2'), ('3', '3'), ('0', 'extra'))
+
+    def test_render_selected(self):
+        self.check_html(self.widget, 'beatles', ['J'], choices=self.beatles, html=(
+            """<select multiple="multiple" name="beatles">
+            <option value="J" selected="selected">John</option>
+            <option value="P">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>"""
+        ))
+
+    def test_render_multiple_selected(self):
+        self.check_html(self.widget, 'beatles', ['J', 'P'], choices=self.beatles, html=(
+            """<select multiple="multiple" name="beatles">
+            <option value="J" selected="selected">John</option>
+            <option value="P" selected="selected">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>"""
+        ))
+
+    def test_render_none(self):
+        """
+        If the value is None, none of the options are selected.
+        """
+        self.check_html(self.widget, 'beatles', None, choices=self.beatles, html=(
+            """<select multiple="multiple" name="beatles">
+            <option value="J">John</option>
+            <option value="P">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>"""
+        ))
+
+    def test_render_value_label(self):
+        """
+        If the value corresponds to a label (but not to an option value), none
+        of the options are selected.
+        """
+        self.check_html(self.widget, 'beatles', ['John'], choices=self.beatles, html=(
+            """<select multiple="multiple" name="beatles">
+            <option value="J">John</option>
+            <option value="P">Paul</option>
+            <option value="G">George</option>
+            <option value="R">Ringo</option>
+            </select>"""
+        ))
+
+    def test_multiple_options_same_value(self):
+        """
+        Multiple options with the same value can be selected (#8103).
+        """
+        self.check_html(self.widget, 'choices', ['0'], choices=self.numeric_choices, html=(
+            """<select multiple="multiple" name="choices">
+            <option value="0" selected="selected">0</option>
+            <option value="1">1</option>
+            <option value="2">2</option>
+            <option value="3">3</option>
+            <option value="0" selected="selected">extra</option>
+            </select>"""
+        ))
+
+    def test_multiple_values_invalid(self):
+        """
+        If multiple values are given, but some of them are not valid, the valid
+        ones are selected.
+        """
+        self.check_html(self.widget, 'beatles', ['J', 'G', 'foo'], choices=self.beatles, html=(
+            """<select multiple="multiple" name="beatles">
+            <option value="J" selected="selected">John</option>
+            <option value="P">Paul</option>
+            <option value="G" selected="selected">George</option>
+            <option value="R">Ringo</option>
+            </select>"""
+        ))
+
+    def test_compare_string(self):
+        choices = [('1', '1'), ('2', '2'), ('3', '3')]
+
+        self.check_html(self.widget, 'nums', [2], choices=choices, html=(
+            """<select multiple="multiple" name="nums">
+            <option value="1">1</option>
+            <option value="2" selected="selected">2</option>
+            <option value="3">3</option>
+            </select>"""
+        ))
+
+        self.check_html(self.widget, 'nums', ['2'], choices=choices, html=(
+            """<select multiple="multiple" name="nums">
+            <option value="1">1</option>
+            <option value="2" selected="selected">2</option>
+            <option value="3">3</option>
+            </select>"""
+        ))
+
+        self.check_html(self.widget, 'nums', [2], choices=choices, html=(
+            """<select multiple="multiple" name="nums">
+            <option value="1">1</option>
+            <option value="2" selected="selected">2</option>
+            <option value="3">3</option>
+            </select>"""
+        ))
+
+    def test_optgroup_select_multiple(self):
+        widget = SelectMultiple(choices=(
+            ('outer1', 'Outer 1'),
+            ('Group "1"', (('inner1', 'Inner 1'), ('inner2', 'Inner 2'))),
+        ))
+        self.check_html(widget, 'nestchoice', ['outer1', 'inner2'], html=(
+            """<select multiple="multiple" name="nestchoice">
+            <option value="outer1" selected="selected">Outer 1</option>
+            <optgroup label="Group &quot;1&quot;">
+            <option value="inner1">Inner 1</option>
+            <option value="inner2" selected="selected">Inner 2</option>
+            </optgroup>
+            </select>"""
+        ))

tests/forms_tests/widget_tests/test_splitdatetimewidget.py

+from datetime import date, datetime, time
+
+from django.forms import SplitDateTimeWidget
+
+from .base import WidgetTest
+
+
+class SplitDateTimeWidgetTest(WidgetTest):
+    widget = SplitDateTimeWidget()
+
+    def test_render_empty(self):
+        self.check_html(self.widget, 'date', '', html=(
+            '<input type="text" name="date_0" /><input type="text" name="date_1" />'
+        ))
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'date', None, html=(
+            '<input type="text" name="date_0" /><input type="text" name="date_1" />'
+        ))
+
+    def test_render_datetime(self):
+        self.check_html(self.widget, 'date', datetime(2006, 1, 10, 7, 30), html=(
+            '<input type="text" name="date_0" value="2006-01-10" />'
+            '<input type="text" name="date_1" value="07:30:00" />'
+        ))
+
+    def test_render_date_and_time(self):
+        self.check_html(self.widget, 'date', [date(2006, 1, 10), time(7, 30)], html=(
+            '<input type="text" name="date_0" value="2006-01-10" />'
+            '<input type="text" name="date_1" value="07:30:00" />'
+        ))
+
+    def test_constructor_attrs(self):
+        widget = SplitDateTimeWidget(attrs={'class': 'pretty'})
+        self.check_html(widget, 'date', datetime(2006, 1, 10, 7, 30), html=(
+            '<input type="text" class="pretty" value="2006-01-10" name="date_0" />'
+            '<input type="text" class="pretty" value="07:30:00" name="date_1" />'
+        ))
+
+    def test_formatting(self):
+        """
+        Use 'date_format' and 'time_format' to change the way a value is
+        displayed.
+        """
+        widget = SplitDateTimeWidget(
+            date_format='%d/%m/%Y', time_format='%H:%M',
+        )
+        self.check_html(widget, 'date', datetime(2006, 1, 10, 7, 30), html=(
+            '<input type="text" name="date_0" value="10/01/2006" />'
+            '<input type="text" name="date_1" value="07:30" />'
+        ))

tests/forms_tests/widget_tests/test_splithiddendatetimewidget.py

+from datetime import datetime
+
+from django.forms import SplitHiddenDateTimeWidget
+from django.test import override_settings
+from django.utils import translation
+
+from .base import WidgetTest
+
+
+class SplitHiddenDateTimeWidgetTest(WidgetTest):
+    widget = SplitHiddenDateTimeWidget()
+
+    def test_render_empty(self):
+        self.check_html(self.widget, 'date', '', html=(
+            '<input type="hidden" name="date_0" /><input type="hidden" name="date_1" />'
+        ))
+
+    def test_render_value(self):
+        d = datetime(2007, 9, 17, 12, 51, 34, 482548)
+        self.check_html(self.widget, 'date', d, html=(
+            '<input type="hidden" name="date_0" value="2007-09-17" />'
+            '<input type="hidden" name="date_1" value="12:51:34" />'
+        ))
+        self.check_html(self.widget, 'date', datetime(2007, 9, 17, 12, 51, 34), html=(
+            '<input type="hidden" name="date_0" value="2007-09-17" />'
+            '<input type="hidden" name="date_1" value="12:51:34" />'
+        ))
+        self.check_html(self.widget, 'date', datetime(2007, 9, 17, 12, 51), html=(
+            '<input type="hidden" name="date_0" value="2007-09-17" />'
+            '<input type="hidden" name="date_1" value="12:51:00" />'
+        ))
+
+    @override_settings(USE_L10N=True)
+    @translation.override('de-at')
+    def test_l10n(self):
+        d = datetime(2007, 9, 17, 12, 51)
+        self.check_html(self.widget, 'date', d, html=(
+            """
+            <input type="hidden" name="date_0" value="17.09.2007" />
+            <input type="hidden" name="date_1" value="12:51:00" />
+            """
+        ))

tests/forms_tests/widget_tests/test_textarea.py

+from django.forms import Textarea
+from django.utils.safestring import mark_safe
+
+from .base import WidgetTest
+
+
+class TextareaTest(WidgetTest):
+    widget = Textarea()
+
+    def test_render(self):
+        self.check_html(self.widget, 'msg', 'value', html=(
+            '<textarea rows="10" cols="40" name="msg">value</textarea>'
+        ))
+
+    def test_render_required(self):
+        widget = Textarea()
+        widget.is_required = True
+        self.check_html(widget, 'msg', 'value', html='<textarea rows="10" cols="40" name="msg">value</textarea>')
+
+    def test_render_empty(self):
+        self.check_html(self.widget, 'msg', '', html='<textarea rows="10" cols="40" name="msg"></textarea>')
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'msg', None, html='<textarea rows="10" cols="40" name="msg"></textarea>')
+
+    def test_escaping(self):
+        self.check_html(self.widget, 'msg', 'some "quoted" & ampersanded value', html=(
+            '<textarea rows="10" cols="40" name="msg">some &quot;quoted&quot; &amp; ampersanded value</textarea>'
+        ))
+
+    def test_mark_safe(self):
+        self.check_html(self.widget, 'msg', mark_safe('pre &quot;quoted&quot; value'), html=(
+            '<textarea rows="10" cols="40" name="msg">pre &quot;quoted&quot; value</textarea>'
+        ))

tests/forms_tests/widget_tests/test_textinput.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.forms import TextInput
+from django.utils.safestring import mark_safe
+
+from .base import WidgetTest
+
+
+class TextInputTest(WidgetTest):
+    widget = TextInput()
+
+    def test_render(self):
+        self.check_html(self.widget, 'email', '', html='<input type="text" name="email" />')
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'email', None, html='<input type="text" name="email" />')
+
+    def test_render_value(self):
+        self.check_html(self.widget, 'email', 'test@example.com', html=(
+            '<input type="text" name="email" value="test@example.com" />'
+        ))
+
+    def test_render_boolean(self):
+        """
+        Boolean values are rendered to their string forms ("True" and
+        "False").
+        """
+        self.check_html(self.widget, 'get_spam', False, html=(
+            '<input type="text" name="get_spam" value="False" />'
+        ))
+        self.check_html(self.widget, 'get_spam', True, html=(
+            '<input type="text" name="get_spam" value="True" />'
+        ))
+
+    def test_render_quoted(self):
+        self.check_html(
+            self.widget, 'email', 'some "quoted" & ampersanded value',
+            html='<input type="text" name="email" value="some &quot;quoted&quot; &amp; ampersanded value" />',
+        )
+
+    def test_render_custom_attrs(self):
+        self.check_html(
+            self.widget, 'email', 'test@example.com', attrs={'class': 'fun'},
+            html='<input type="text" name="email" value="test@example.com" class="fun" />',
+        )
+
+    def test_render_unicode(self):
+        self.check_html(
+            self.widget, 'email', 'ŠĐĆŽćžšđ', attrs={'class': 'fun'},
+            html=(
+                '<input type="text" name="email" '
+                'value="\u0160\u0110\u0106\u017d\u0107\u017e\u0161\u0111" class="fun" />'
+            ),
+        )
+
+    def test_constructor_attrs(self):
+        widget = TextInput(attrs={'class': 'fun', 'type': 'email'})
+        self.check_html(widget, 'email', '', html='<input type="email" class="fun" name="email" />')
+        self.check_html(
+            widget, 'email', 'foo@example.com',
+            html='<input type="email" class="fun" value="foo@example.com" name="email" />',
+        )
+
+    def test_attrs_precedence(self):
+        """
+        `attrs` passed to render() get precedence over those passed to the
+        constructor
+        """
+        widget = TextInput(attrs={'class': 'pretty'})
+        self.check_html(
+            widget, 'email', '', attrs={'class': 'special'},
+            html='<input type="text" class="special" name="email" />',
+        )
+
+    def test_attrs_safestring(self):
+        widget = TextInput(attrs={'onBlur': mark_safe("function('foo')")})
+        self.check_html(widget, 'email', '', html='<input onBlur="function(\'foo\')" type="text" name="email" />')

tests/forms_tests/widget_tests/test_timeinput.py

+from datetime import time
+
+from django.forms import TimeInput
+from django.test import override_settings
+from django.utils import translation
+
+from .base import WidgetTest
+
+
+class TimeInputTest(WidgetTest):
+    widget = TimeInput()
+
+    def test_render_none(self):
+        self.check_html(self.widget, 'time', None, html='<input type="text" name="time" />')
+
+    def test_render_value(self):
+        """
+        The microseconds are trimmed on display, by default.
+        """
+        t = time(12, 51, 34, 482548)
+        self.assertEqual(str(t), '12:51:34.482548')
+        self.check_html(self.widget, 'time', t, html='<input type="text" name="time" value="12:51:34" />')
+        self.check_html(self.widget, 'time', time(12, 51, 34), html=(
+            '<input type="text" name="time" value="12:51:34" />'
+        ))
+        self.check_html(self.widget, 'time', time(12, 51), html=(
+            '<input type="text" name="time" value="12:51:00" />'
+        ))
+
+    def test_string(self):
+        """
+        We should be able to initialize from a unicode value.
+        """
+        self.check_html(self.widget, 'time', '13:12:11', html=(
+            '<input type="text" name="time" value="13:12:11" />'
+        ))
+
+    def test_format(self):
+        """
+        Use 'format' to change the way a value is displayed.
+        """
+        t = time(12, 51, 34, 482548)
+        widget = TimeInput(format='%H:%M', attrs={'type': 'time'})
+        self.check_html(widget, 'time', t, html='<input type="time" name="time" value="12:51" />')
+
+    @override_settings(USE_L10N=True)
+    @translation.override('de-at')
+    def test_l10n(self):
+        t = time(12, 51, 34, 482548)
+        self.check_html(self.widget, 'time', t, html='<input type="text" name="time" value="12:51:34" />')