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from rest_framework import fields
import pytest
class TestFieldOptions:
def test_required(self):
"""
By default a field must be included in the input.
"""
field = fields.IntegerField()
with pytest.raises(fields.ValidationError) as exc_info:
field.run_validation()
assert exc_info.value.messages == ['This field is required.']
def test_not_required(self):
"""
If `required=False` then a field may be omitted from the input.
"""
field = fields.IntegerField(required=False)
with pytest.raises(fields.SkipField):
field.run_validation()
def test_disallow_null(self):
"""
By default `None` is not a valid input.
"""
field = fields.IntegerField()
with pytest.raises(fields.ValidationError) as exc_info:
field.run_validation(None)
assert exc_info.value.messages == ['This field may not be null.']
def test_allow_null(self):
"""
If `allow_null=True` then `None` is a valid input.
"""
field = fields.IntegerField(allow_null=True)
output = field.run_validation(None)
assert output is None
def test_disallow_blank(self):
"""
By default '' is not a valid input.
"""
field = fields.CharField()
with pytest.raises(fields.ValidationError) as exc_info:
field.run_validation('')
assert exc_info.value.messages == ['This field may not be blank.']
def test_allow_blank(self):
"""
If `allow_blank=True` then '' is a valid input.
"""
field = fields.CharField(allow_blank=True)
output = field.run_validation('')
assert output is ''
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