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139 lines
4.8 KiB
Python
139 lines
4.8 KiB
Python
import json
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import uuid
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from django.core.serializers.json import DjangoJSONEncoder
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from django.forms import (
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CharField,
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Form,
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JSONField,
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Textarea,
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TextInput,
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ValidationError,
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)
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from django.test import SimpleTestCase
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class JSONFieldTest(SimpleTestCase):
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def test_valid(self):
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field = JSONField()
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value = field.clean('{"a": "b"}')
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self.assertEqual(value, {"a": "b"})
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def test_valid_empty(self):
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field = JSONField(required=False)
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self.assertIsNone(field.clean(""))
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self.assertIsNone(field.clean(None))
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def test_invalid(self):
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field = JSONField()
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with self.assertRaisesMessage(ValidationError, "Enter a valid JSON."):
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field.clean("{some badly formed: json}")
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def test_prepare_value(self):
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field = JSONField()
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self.assertEqual(field.prepare_value({"a": "b"}), '{"a": "b"}')
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self.assertEqual(field.prepare_value(None), "null")
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self.assertEqual(field.prepare_value("foo"), '"foo"')
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self.assertEqual(field.prepare_value("你好，世界"), '"你好，世界"')
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self.assertEqual(field.prepare_value({"a": "😀🐱"}), '{"a": "😀🐱"}')
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self.assertEqual(
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field.prepare_value(["你好，世界", "jaźń"]),
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'["你好，世界", "jaźń"]',
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)
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def test_widget(self):
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field = JSONField()
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self.assertIsInstance(field.widget, Textarea)
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def test_custom_widget_kwarg(self):
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field = JSONField(widget=TextInput)
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self.assertIsInstance(field.widget, TextInput)
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def test_custom_widget_attribute(self):
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"""The widget can be overridden with an attribute."""
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class CustomJSONField(JSONField):
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widget = TextInput
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field = CustomJSONField()
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self.assertIsInstance(field.widget, TextInput)
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def test_converted_value(self):
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field = JSONField(required=False)
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tests = [
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'["a", "b", "c"]',
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'{"a": 1, "b": 2}',
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"1",
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"1.5",
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'"foo"',
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"true",
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"false",
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"null",
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]
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for json_string in tests:
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with self.subTest(json_string=json_string):
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val = field.clean(json_string)
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self.assertEqual(field.clean(val), val)
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def test_has_changed(self):
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field = JSONField()
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self.assertIs(field.has_changed({"a": True}, '{"a": 1}'), True)
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self.assertIs(field.has_changed({"a": 1, "b": 2}, '{"b": 2, "a": 1}'), False)
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def test_custom_encoder_decoder(self):
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class CustomDecoder(json.JSONDecoder):
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def __init__(self, object_hook=None, *args, **kwargs):
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return super().__init__(object_hook=self.as_uuid, *args, **kwargs)
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def as_uuid(self, dct):
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if "uuid" in dct:
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dct["uuid"] = uuid.UUID(dct["uuid"])
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return dct
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value = {"uuid": uuid.UUID("{c141e152-6550-4172-a784-05448d98204b}")}
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encoded_value = '{"uuid": "c141e152-6550-4172-a784-05448d98204b"}'
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field = JSONField(encoder=DjangoJSONEncoder, decoder=CustomDecoder)
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self.assertEqual(field.prepare_value(value), encoded_value)
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self.assertEqual(field.clean(encoded_value), value)
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def test_formfield_disabled(self):
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class JSONForm(Form):
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json_field = JSONField(disabled=True)
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form = JSONForm({"json_field": '["bar"]'}, initial={"json_field": ["foo"]})
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self.assertIn("["foo"]</textarea>", form.as_p())
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def test_redisplay_none_input(self):
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class JSONForm(Form):
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json_field = JSONField(required=True)
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tests = [
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{},
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{"json_field": None},
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]
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for data in tests:
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with self.subTest(data=data):
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form = JSONForm(data)
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self.assertEqual(form["json_field"].value(), "null")
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self.assertIn("null</textarea>", form.as_p())
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self.assertEqual(form.errors["json_field"], ["This field is required."])
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def test_redisplay_wrong_input(self):
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"""
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Displaying a bound form (typically due to invalid input). The form
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should not overquote JSONField inputs.
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"""
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class JSONForm(Form):
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name = CharField(max_length=2)
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json_field = JSONField()
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# JSONField input is valid, name is too long.
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form = JSONForm({"name": "xyz", "json_field": '["foo"]'})
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self.assertNotIn("json_field", form.errors)
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self.assertIn("["foo"]</textarea>", form.as_p())
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# Invalid JSONField.
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form = JSONForm({"name": "xy", "json_field": '{"foo"}'})
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self.assertEqual(form.errors["json_field"], ["Enter a valid JSON."])
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self.assertIn("{"foo"}</textarea>", form.as_p())
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