example-of-crud-in-django-with-rest-framework/tests/libros/test_serializers.py

# tests/libros/test_serializers.py

from app.libros.serializers import LibroSerializer

def test_valid_libro_serializer():
    valid_serializer_data = {
        "title": "Raising Arizona",
        "genre": "comedy",
        "year": "1987",
        "author": "Ray Bradbury",
    }
    serializer = LibroSerializer(data=valid_serializer_data)
    assert serializer.is_valid()
    assert serializer.validated_data == valid_serializer_data
    assert serializer.data == valid_serializer_data
    assert serializer.errors == {}


def test_invalid_libro_serializer():
    invalid_serializer_data = {
        "title": "Soy Leyenda",
        "author": "Richard Matheson",
    }
    serializer = LibroSerializer(data=invalid_serializer_data)
    assert not serializer.is_valid()
    assert serializer.validated_data == {}
    assert serializer.data == invalid_serializer_data
    assert serializer.errors == {
        "year": ["This field is required."],
        "genre": ["This field is required."],
    }