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50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
from django.db import transaction
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from django.test import TestCase
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from .models import FloatModel
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class TestFloatField(TestCase):
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def test_float_validates_object(self):
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instance = FloatModel(size=2.5)
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# Try setting float field to unsaved object
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instance.size = instance
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with transaction.atomic():
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with self.assertRaises(TypeError):
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instance.save()
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# Set value to valid and save
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instance.size = 2.5
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instance.save()
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self.assertTrue(instance.id)
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# Set field to object on saved instance
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instance.size = instance
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msg = (
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"Tried to update field model_fields.FloatModel.size with a model "
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"instance, %r. Use a value compatible with FloatField."
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) % instance
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with transaction.atomic():
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with self.assertRaisesMessage(TypeError, msg):
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instance.save()
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# Try setting field to object on retrieved object
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obj = FloatModel.objects.get(pk=instance.id)
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obj.size = obj
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with self.assertRaisesMessage(TypeError, msg):
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obj.save()
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def test_invalid_value(self):
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tests = [
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(TypeError, ()),
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(TypeError, []),
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(TypeError, {}),
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(TypeError, set()),
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(TypeError, object()),
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(TypeError, complex()),
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(ValueError, "non-numeric string"),
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(ValueError, b"non-numeric byte-string"),
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]
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for exception, value in tests:
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with self.subTest(value):
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msg = "Field 'size' expected a number but got %r." % (value,)
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with self.assertRaisesMessage(exception, msg):
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FloatModel.objects.create(size=value)
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