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from datetime import datetime
from django.core.exceptions import ValidationError
from django.forms import (
CharField,
Form,
MultipleChoiceField,
MultiValueField,
MultiWidget,
SelectMultiple,
SplitDateTimeField,
SplitDateTimeWidget,
TextInput,
)
from django.test import SimpleTestCase
beatles = (("J", "John"), ("P", "Paul"), ("G", "George"), ("R", "Ringo"))
class PartiallyRequiredField(MultiValueField):
def compress(self, data_list):
return ",".join(data_list) if data_list else None
class PartiallyRequiredForm(Form):
f = PartiallyRequiredField(
fields=(CharField(required=True), CharField(required=False)),
required=True,
require_all_fields=False,
widget=MultiWidget(widgets=[TextInput(), TextInput()]),
)
class ComplexMultiWidget(MultiWidget):
def __init__(self, attrs=None):
widgets = (
TextInput(),
SelectMultiple(choices=beatles),
SplitDateTimeWidget(),
)
super().__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]
class ComplexField(MultiValueField):
def __init__(self, **kwargs):
fields = (
CharField(),
MultipleChoiceField(choices=beatles),
SplitDateTimeField(),
)
super().__init__(fields, **kwargs)
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().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_clean_disabled_multivalue(self):
class ComplexFieldForm(Form):
f = ComplexField(disabled=True, widget=ComplexMultiWidget)
inputs = (
"some text,JP,2007-04-25 06:24:00",
["some text", ["J", "P"], ["2007-04-25", "6:24:00"]],
)
for data in inputs:
with self.subTest(data=data):
form = ComplexFieldForm({}, initial={"f": data})
form.full_clean()
self.assertEqual(form.errors, {})
self.assertEqual(form.cleaned_data, {"f": inputs[0]})
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_disabled_has_changed(self):
f = MultiValueField(fields=(CharField(), CharField()), disabled=True)
self.assertIs(f.has_changed(["x", "x"], ["y", "y"]), False)
def test_form_as_table(self):
form = ComplexFieldForm()
self.assertHTMLEqual(
form.as_table(),
"""
<tr><th><label>Field1:</label></th>
<td><input type="text" name="field1_0" id="id_field1_0" required>
<select multiple name="field1_1" id="id_field1_1" required>
<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" required>
<input type="text" name="field1_2_1" id="id_field1_2_1" required></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>Field1:</label></th>
<td><input type="text" name="field1_0" value="some text" id="id_field1_0"
required>
<select multiple name="field1_1" id="id_field1_1" required>
<option value="J" selected>John</option>
<option value="P" 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"
required>
<input type="text" name="field1_2_1" value="06:24:00" id="id_field1_2_1"
required></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"
)
def test_render_required_attributes(self):
form = PartiallyRequiredForm({"f_0": "Hello", "f_1": ""})
self.assertTrue(form.is_valid())
self.assertInHTML(
'<input type="text" name="f_0" value="Hello" required id="id_f_0">',
form.as_p(),
)
self.assertInHTML('<input type="text" name="f_1" id="id_f_1">', form.as_p())
form = PartiallyRequiredForm({"f_0": "", "f_1": ""})
self.assertFalse(form.is_valid())
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