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from rest_framework import serializers
import pytest
# Tests for core functionality.
# -----------------------------
class TestSerializer:
def setup(self):
class ExampleSerializer(serializers.Serializer):
char = serializers.CharField()
integer = serializers.IntegerField()
self.Serializer = ExampleSerializer
def test_valid_serializer(self):
serializer = self.Serializer(data={'char': 'abc', 'integer': 123})
assert serializer.is_valid()
assert serializer.validated_data == {'char': 'abc', 'integer': 123}
assert serializer.errors == {}
def test_invalid_serializer(self):
serializer = self.Serializer(data={'char': 'abc'})
assert not serializer.is_valid()
assert serializer.validated_data == {}
assert serializer.errors == {'integer': ['This field is required.']}
def test_partial_validation(self):
serializer = self.Serializer(data={'char': 'abc'}, partial=True)
assert serializer.is_valid()
assert serializer.validated_data == {'char': 'abc'}
assert serializer.errors == {}
def test_empty_serializer(self):
serializer = self.Serializer()
assert serializer.data == {'char': '', 'integer': None}
def test_missing_attribute_during_serialization(self):
class MissingAttributes:
pass
instance = MissingAttributes()
serializer = self.Serializer(instance)
with pytest.raises(AttributeError):
serializer.data
class TestValidateMethod:
def test_non_field_error_validate_method(self):
class ExampleSerializer(serializers.Serializer):
char = serializers.CharField()
integer = serializers.IntegerField()
def validate(self, attrs):
raise serializers.ValidationError('Non field error')
serializer = ExampleSerializer(data={'char': 'abc', 'integer': 123})
assert not serializer.is_valid()
assert serializer.errors == {'non_field_errors': ['Non field error']}
def test_field_error_validate_method(self):
class ExampleSerializer(serializers.Serializer):
char = serializers.CharField()
integer = serializers.IntegerField()
def validate(self, attrs):
raise serializers.ValidationError({'char': 'Field error'})
serializer = ExampleSerializer(data={'char': 'abc', 'integer': 123})
assert not serializer.is_valid()
assert serializer.errors == {'char': ['Field error']}
class TestBaseSerializer:
def setup(self):
class ExampleSerializer(serializers.BaseSerializer):
def to_representation(self, obj):
return {
'id': obj['id'],
'email': obj['name'] + '@' + obj['domain']
}
def to_internal_value(self, data):
name, domain = str(data['email']).split('@')
return {
'id': int(data['id']),
'name': name,
'domain': domain,
}
self.Serializer = ExampleSerializer
def test_serialize_instance(self):
instance = {'id': 1, 'name': 'tom', 'domain': 'example.com'}
serializer = self.Serializer(instance)
assert serializer.data == {'id': 1, 'email': 'tom@example.com'}
def test_serialize_list(self):
instances = [
{'id': 1, 'name': 'tom', 'domain': 'example.com'},
{'id': 2, 'name': 'ann', 'domain': 'example.com'},
]
serializer = self.Serializer(instances, many=True)
assert serializer.data == [
{'id': 1, 'email': 'tom@example.com'},
{'id': 2, 'email': 'ann@example.com'}
]
def test_validate_data(self):
data = {'id': 1, 'email': 'tom@example.com'}
serializer = self.Serializer(data=data)
assert serializer.is_valid()
assert serializer.validated_data == {
'id': 1,
'name': 'tom',
'domain': 'example.com'
}
def test_validate_list(self):
data = [
{'id': 1, 'email': 'tom@example.com'},
{'id': 2, 'email': 'ann@example.com'},
]
serializer = self.Serializer(data=data, many=True)
assert serializer.is_valid()
assert serializer.validated_data == [
{'id': 1, 'name': 'tom', 'domain': 'example.com'},
{'id': 2, 'name': 'ann', 'domain': 'example.com'}
]
class TestStarredSource:
"""
Tests for `source='*'` argument, which is used for nested representations.
For example:
nested_field = NestedField(source='*')
"""
data = {
'nested1': {'a': 1, 'b': 2},
'nested2': {'c': 3, 'd': 4}
}
def setup(self):
class NestedSerializer1(serializers.Serializer):
a = serializers.IntegerField()
b = serializers.IntegerField()
class NestedSerializer2(serializers.Serializer):
c = serializers.IntegerField()
d = serializers.IntegerField()
class TestSerializer(serializers.Serializer):
nested1 = NestedSerializer1(source='*')
nested2 = NestedSerializer2(source='*')
self.Serializer = TestSerializer
def test_nested_validate(self):
"""
A nested representation is validated into a flat internal object.
"""
serializer = self.Serializer(data=self.data)
assert serializer.is_valid()
assert serializer.validated_data == {
'a': 1,
'b': 2,
'c': 3,
'd': 4
}
def test_nested_serialize(self):
"""
An object can be serialized into a nested representation.
"""
instance = {'a': 1, 'b': 2, 'c': 3, 'd': 4}
serializer = self.Serializer(instance)
assert serializer.data == self.data
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