mirror of
https://github.com/django/django.git
synced 2024-12-23 01:25:58 +00:00
398 lines
14 KiB
Python
398 lines
14 KiB
Python
import collections.abc
|
|
from unittest import mock
|
|
|
|
from django.db.models import TextChoices
|
|
from django.test import SimpleTestCase
|
|
from django.utils.choices import (
|
|
BaseChoiceIterator,
|
|
CallableChoiceIterator,
|
|
flatten_choices,
|
|
normalize_choices,
|
|
)
|
|
from django.utils.translation import gettext_lazy as _
|
|
|
|
|
|
class SimpleChoiceIterator(BaseChoiceIterator):
|
|
def __iter__(self):
|
|
return ((i, f"Item #{i}") for i in range(1, 4))
|
|
|
|
|
|
class ChoiceIteratorTests(SimpleTestCase):
|
|
def test_not_implemented_error_on_missing_iter(self):
|
|
class InvalidChoiceIterator(BaseChoiceIterator):
|
|
pass # Not overriding __iter__().
|
|
|
|
msg = "BaseChoiceIterator subclasses must implement __iter__()."
|
|
with self.assertRaisesMessage(NotImplementedError, msg):
|
|
iter(InvalidChoiceIterator())
|
|
|
|
def test_eq(self):
|
|
unrolled = [(1, "Item #1"), (2, "Item #2"), (3, "Item #3")]
|
|
self.assertEqual(SimpleChoiceIterator(), unrolled)
|
|
self.assertEqual(unrolled, SimpleChoiceIterator())
|
|
|
|
def test_eq_instances(self):
|
|
self.assertEqual(SimpleChoiceIterator(), SimpleChoiceIterator())
|
|
|
|
def test_not_equal_subset(self):
|
|
self.assertNotEqual(SimpleChoiceIterator(), [(1, "Item #1"), (2, "Item #2")])
|
|
|
|
def test_not_equal_superset(self):
|
|
self.assertNotEqual(
|
|
SimpleChoiceIterator(),
|
|
[(1, "Item #1"), (2, "Item #2"), (3, "Item #3"), None],
|
|
)
|
|
|
|
def test_getitem(self):
|
|
choices = SimpleChoiceIterator()
|
|
for i, expected in [(0, (1, "Item #1")), (-1, (3, "Item #3"))]:
|
|
with self.subTest(index=i):
|
|
self.assertEqual(choices[i], expected)
|
|
|
|
def test_getitem_indexerror(self):
|
|
choices = SimpleChoiceIterator()
|
|
for i in (4, -4):
|
|
with self.subTest(index=i):
|
|
with self.assertRaises(IndexError) as ctx:
|
|
choices[i]
|
|
self.assertTrue(str(ctx.exception).endswith("index out of range"))
|
|
|
|
|
|
class FlattenChoicesTests(SimpleTestCase):
|
|
def test_empty(self):
|
|
def generator():
|
|
yield from ()
|
|
|
|
for choices in ({}, [], (), set(), frozenset(), generator(), None, ""):
|
|
with self.subTest(choices=choices):
|
|
result = flatten_choices(choices)
|
|
self.assertIsInstance(result, collections.abc.Generator)
|
|
self.assertEqual(list(result), [])
|
|
|
|
def test_non_empty(self):
|
|
choices = [
|
|
("C", _("Club")),
|
|
("D", _("Diamond")),
|
|
("H", _("Heart")),
|
|
("S", _("Spade")),
|
|
]
|
|
result = flatten_choices(choices)
|
|
self.assertIsInstance(result, collections.abc.Generator)
|
|
self.assertEqual(list(result), choices)
|
|
|
|
def test_nested_choices(self):
|
|
choices = [
|
|
("Audio", [("vinyl", _("Vinyl")), ("cd", _("CD"))]),
|
|
("Video", [("vhs", _("VHS Tape")), ("dvd", _("DVD"))]),
|
|
("unknown", _("Unknown")),
|
|
]
|
|
expected = [
|
|
("vinyl", _("Vinyl")),
|
|
("cd", _("CD")),
|
|
("vhs", _("VHS Tape")),
|
|
("dvd", _("DVD")),
|
|
("unknown", _("Unknown")),
|
|
]
|
|
result = flatten_choices(choices)
|
|
self.assertIsInstance(result, collections.abc.Generator)
|
|
self.assertEqual(list(result), expected)
|
|
|
|
|
|
class NormalizeFieldChoicesTests(SimpleTestCase):
|
|
expected = [
|
|
("C", _("Club")),
|
|
("D", _("Diamond")),
|
|
("H", _("Heart")),
|
|
("S", _("Spade")),
|
|
]
|
|
expected_nested = [
|
|
("Audio", [("vinyl", _("Vinyl")), ("cd", _("CD"))]),
|
|
("Video", [("vhs", _("VHS Tape")), ("dvd", _("DVD"))]),
|
|
("unknown", _("Unknown")),
|
|
]
|
|
invalid = [
|
|
1j,
|
|
123,
|
|
123.45,
|
|
"invalid",
|
|
b"invalid",
|
|
_("invalid"),
|
|
object(),
|
|
None,
|
|
True,
|
|
False,
|
|
]
|
|
invalid_iterable = [
|
|
# Special cases of a string-likes which would unpack incorrectly.
|
|
["ab"],
|
|
[b"ab"],
|
|
[_("ab")],
|
|
# Non-iterable items or iterable items with incorrect number of
|
|
# elements that cannot be unpacked.
|
|
[123],
|
|
[("value",)],
|
|
[("value", "label", "other")],
|
|
]
|
|
invalid_nested = [
|
|
# Nested choices can only be two-levels deep, so return callables,
|
|
# mappings, iterables, etc. at deeper levels unmodified.
|
|
[("Group", [("Value", lambda: "Label")])],
|
|
[("Group", [("Value", {"Label 1?": "Label 2?"})])],
|
|
[("Group", [("Value", [("Label 1?", "Label 2?")])])],
|
|
]
|
|
|
|
def test_empty(self):
|
|
def generator():
|
|
yield from ()
|
|
|
|
for choices in ({}, [], (), set(), frozenset(), generator()):
|
|
with self.subTest(choices=choices):
|
|
self.assertEqual(normalize_choices(choices), [])
|
|
|
|
def test_choices(self):
|
|
class Medal(TextChoices):
|
|
GOLD = "GOLD", _("Gold")
|
|
SILVER = "SILVER", _("Silver")
|
|
BRONZE = "BRONZE", _("Bronze")
|
|
|
|
expected = [
|
|
("GOLD", _("Gold")),
|
|
("SILVER", _("Silver")),
|
|
("BRONZE", _("Bronze")),
|
|
]
|
|
self.assertEqual(normalize_choices(Medal), expected)
|
|
|
|
def test_callable(self):
|
|
def get_choices():
|
|
return {
|
|
"C": _("Club"),
|
|
"D": _("Diamond"),
|
|
"H": _("Heart"),
|
|
"S": _("Spade"),
|
|
}
|
|
|
|
get_choices_spy = mock.Mock(wraps=get_choices)
|
|
output = normalize_choices(get_choices_spy)
|
|
|
|
get_choices_spy.assert_not_called()
|
|
self.assertIsInstance(output, CallableChoiceIterator)
|
|
self.assertEqual(output, self.expected)
|
|
get_choices_spy.assert_called_once()
|
|
|
|
def test_mapping(self):
|
|
choices = {
|
|
"C": _("Club"),
|
|
"D": _("Diamond"),
|
|
"H": _("Heart"),
|
|
"S": _("Spade"),
|
|
}
|
|
self.assertEqual(normalize_choices(choices), self.expected)
|
|
|
|
def test_iterable(self):
|
|
choices = [
|
|
("C", _("Club")),
|
|
("D", _("Diamond")),
|
|
("H", _("Heart")),
|
|
("S", _("Spade")),
|
|
]
|
|
self.assertEqual(normalize_choices(choices), self.expected)
|
|
|
|
def test_iterator(self):
|
|
def generator():
|
|
yield "C", _("Club")
|
|
yield "D", _("Diamond")
|
|
yield "H", _("Heart")
|
|
yield "S", _("Spade")
|
|
|
|
choices = generator()
|
|
self.assertEqual(normalize_choices(choices), self.expected)
|
|
|
|
def test_nested_callable(self):
|
|
def get_audio_choices():
|
|
return [("vinyl", _("Vinyl")), ("cd", _("CD"))]
|
|
|
|
def get_video_choices():
|
|
return [("vhs", _("VHS Tape")), ("dvd", _("DVD"))]
|
|
|
|
def get_media_choices():
|
|
return [
|
|
("Audio", get_audio_choices),
|
|
("Video", get_video_choices),
|
|
("unknown", _("Unknown")),
|
|
]
|
|
|
|
get_media_choices_spy = mock.Mock(wraps=get_media_choices)
|
|
output = normalize_choices(get_media_choices_spy)
|
|
|
|
get_media_choices_spy.assert_not_called()
|
|
self.assertIsInstance(output, CallableChoiceIterator)
|
|
self.assertEqual(output, self.expected_nested)
|
|
get_media_choices_spy.assert_called_once()
|
|
|
|
def test_nested_mapping(self):
|
|
choices = {
|
|
"Audio": {"vinyl": _("Vinyl"), "cd": _("CD")},
|
|
"Video": {"vhs": _("VHS Tape"), "dvd": _("DVD")},
|
|
"unknown": _("Unknown"),
|
|
}
|
|
self.assertEqual(normalize_choices(choices), self.expected_nested)
|
|
|
|
def test_nested_iterable(self):
|
|
choices = [
|
|
("Audio", [("vinyl", _("Vinyl")), ("cd", _("CD"))]),
|
|
("Video", [("vhs", _("VHS Tape")), ("dvd", _("DVD"))]),
|
|
("unknown", _("Unknown")),
|
|
]
|
|
self.assertEqual(normalize_choices(choices), self.expected_nested)
|
|
|
|
def test_nested_iterator(self):
|
|
def generate_audio_choices():
|
|
yield "vinyl", _("Vinyl")
|
|
yield "cd", _("CD")
|
|
|
|
def generate_video_choices():
|
|
yield "vhs", _("VHS Tape")
|
|
yield "dvd", _("DVD")
|
|
|
|
def generate_media_choices():
|
|
yield "Audio", generate_audio_choices()
|
|
yield "Video", generate_video_choices()
|
|
yield "unknown", _("Unknown")
|
|
|
|
choices = generate_media_choices()
|
|
self.assertEqual(normalize_choices(choices), self.expected_nested)
|
|
|
|
def test_callable_non_canonical(self):
|
|
# Canonical form is list of 2-tuple, but nested lists should work.
|
|
def get_choices():
|
|
return [
|
|
["C", _("Club")],
|
|
["D", _("Diamond")],
|
|
["H", _("Heart")],
|
|
["S", _("Spade")],
|
|
]
|
|
|
|
get_choices_spy = mock.Mock(wraps=get_choices)
|
|
output = normalize_choices(get_choices_spy)
|
|
|
|
get_choices_spy.assert_not_called()
|
|
self.assertIsInstance(output, CallableChoiceIterator)
|
|
self.assertEqual(output, self.expected)
|
|
get_choices_spy.assert_called_once()
|
|
|
|
def test_iterable_non_canonical(self):
|
|
# Canonical form is list of 2-tuple, but nested lists should work.
|
|
choices = [
|
|
["C", _("Club")],
|
|
["D", _("Diamond")],
|
|
["H", _("Heart")],
|
|
["S", _("Spade")],
|
|
]
|
|
self.assertEqual(normalize_choices(choices), self.expected)
|
|
|
|
def test_iterator_non_canonical(self):
|
|
# Canonical form is list of 2-tuple, but nested lists should work.
|
|
def generator():
|
|
yield ["C", _("Club")]
|
|
yield ["D", _("Diamond")]
|
|
yield ["H", _("Heart")]
|
|
yield ["S", _("Spade")]
|
|
|
|
choices = generator()
|
|
self.assertEqual(normalize_choices(choices), self.expected)
|
|
|
|
def test_nested_callable_non_canonical(self):
|
|
# Canonical form is list of 2-tuple, but nested lists should work.
|
|
|
|
def get_audio_choices():
|
|
return [["vinyl", _("Vinyl")], ["cd", _("CD")]]
|
|
|
|
def get_video_choices():
|
|
return [["vhs", _("VHS Tape")], ["dvd", _("DVD")]]
|
|
|
|
def get_media_choices():
|
|
return [
|
|
["Audio", get_audio_choices],
|
|
["Video", get_video_choices],
|
|
["unknown", _("Unknown")],
|
|
]
|
|
|
|
get_media_choices_spy = mock.Mock(wraps=get_media_choices)
|
|
output = normalize_choices(get_media_choices_spy)
|
|
|
|
get_media_choices_spy.assert_not_called()
|
|
self.assertIsInstance(output, CallableChoiceIterator)
|
|
self.assertEqual(output, self.expected_nested)
|
|
get_media_choices_spy.assert_called_once()
|
|
|
|
def test_nested_iterable_non_canonical(self):
|
|
# Canonical form is list of 2-tuple, but nested lists should work.
|
|
choices = [
|
|
["Audio", [["vinyl", _("Vinyl")], ["cd", _("CD")]]],
|
|
["Video", [["vhs", _("VHS Tape")], ["dvd", _("DVD")]]],
|
|
["unknown", _("Unknown")],
|
|
]
|
|
self.assertEqual(normalize_choices(choices), self.expected_nested)
|
|
|
|
def test_nested_iterator_non_canonical(self):
|
|
# Canonical form is list of 2-tuple, but nested lists should work.
|
|
def generator():
|
|
yield ["Audio", [["vinyl", _("Vinyl")], ["cd", _("CD")]]]
|
|
yield ["Video", [["vhs", _("VHS Tape")], ["dvd", _("DVD")]]]
|
|
yield ["unknown", _("Unknown")]
|
|
|
|
choices = generator()
|
|
self.assertEqual(normalize_choices(choices), self.expected_nested)
|
|
|
|
def test_nested_mixed_mapping_and_iterable(self):
|
|
# Although not documented, as it's better to stick to either mappings
|
|
# or iterables, nesting of mappings within iterables and vice versa
|
|
# works and is likely to occur in the wild. This is supported by the
|
|
# recursive call to `normalize_choices()` which will normalize nested
|
|
# choices.
|
|
choices = {
|
|
"Audio": [("vinyl", _("Vinyl")), ("cd", _("CD"))],
|
|
"Video": [("vhs", _("VHS Tape")), ("dvd", _("DVD"))],
|
|
"unknown": _("Unknown"),
|
|
}
|
|
self.assertEqual(normalize_choices(choices), self.expected_nested)
|
|
choices = [
|
|
("Audio", {"vinyl": _("Vinyl"), "cd": _("CD")}),
|
|
("Video", {"vhs": _("VHS Tape"), "dvd": _("DVD")}),
|
|
("unknown", _("Unknown")),
|
|
]
|
|
self.assertEqual(normalize_choices(choices), self.expected_nested)
|
|
|
|
def test_iterable_set(self):
|
|
# Although not documented, as sets are unordered which results in
|
|
# randomised order in form fields, passing a set of 2-tuples works.
|
|
# Consistent ordering of choices on model fields in migrations is
|
|
# enforced by the migrations serializer.
|
|
choices = {
|
|
("C", _("Club")),
|
|
("D", _("Diamond")),
|
|
("H", _("Heart")),
|
|
("S", _("Spade")),
|
|
}
|
|
self.assertEqual(sorted(normalize_choices(choices)), sorted(self.expected))
|
|
|
|
def test_unsupported_values_returned_unmodified(self):
|
|
# Unsupported values must be returned unmodified for model system check
|
|
# to work correctly.
|
|
for value in self.invalid + self.invalid_iterable + self.invalid_nested:
|
|
with self.subTest(value=value):
|
|
self.assertEqual(normalize_choices(value), value)
|
|
|
|
def test_unsupported_values_from_callable_returned_unmodified(self):
|
|
for value in self.invalid_iterable + self.invalid_nested:
|
|
with self.subTest(value=value):
|
|
self.assertEqual(normalize_choices(lambda: value), value)
|
|
|
|
def test_unsupported_values_from_iterator_returned_unmodified(self):
|
|
for value in self.invalid_nested:
|
|
with self.subTest(value=value):
|
|
self.assertEqual(
|
|
normalize_choices((lambda: (yield from value))()),
|
|
value,
|
|
)
|