Graphene: [Question] testing, errors and debuging

[yamila-moreno]

Hi there; I'm using graphene for a graphql application and I got to an unexpected scenario while doing tests; I haven't been able to find out if it's a bug or something I'm doing wrong.

Scenario:
mutations.py

class CreatePerson(relay.ClientIDMutation):
    class Input:
        name = graphene.String()

    ok = graphene.Boolean() 
    data = graphene.Field(Person)
    errors = graphene.List(graphene.String)

    @classmethod
    def mutate_and_get_payload(cls, root, info, **input):
        name = input.get('name')

        ok, data, errors = myservice.create_person(name=name)
        return CreatePerson(ok=ok, data=data, errors=errors)

myservice.py

def create_person(name):
    already_created = myrepository.get_person_by_name(name)
    if already_created:
        return False, {}, ['ERROR_NOT_UNIQUE']

    person = Person(name=name)
    data = myrepository.create_person(person)
    return True, data, []

tests/mutations/test_person.py

def test_create_person_ko():                                         
    # given                                                           
    person = factories.create_person()                              
    client = Client(schema)                                           
    variables = { "input": {                                          
                    "name": person.name #  repeated name so it should fail
                  }                                                   
                }                                                     
    result = client.execute('''                                       
        mutation CreatePerson($input: CreatePersonInput!) {         
            createPerson(input: $input) {                            
                ok                                                    
            }                                                         
        }                                                             
    ''', variable_values=variables)                                   

    # then                                                            
    assert result == {"data": {"createPerson": {"ok": False}}}       

The first issue is that this test is unexpectedly green, although the result of my mutation should include a list with the errors. And related to this: I tried to debug the code, so I put an import pdb; pdb.set_trace() in the mutation (before the return) but it didn't stop there; then I wrote a simple print("sth") and again, this wasn't displayed in the shell.

My questions (I see them related, but I can open different issues if they are not):

• is this grafene.test.Client mocking everything and ignoring print/pdb?
• is it expected in this code not to receive the error list?

Sorry for the textwall, I hope at least it's clear. Thanks for your time!
Thank you for your time!

[mandx]

is it expected in this code not to receive the error list?

The query is not asking for the errors, so I guess that's why they are not in the response...

    result = client.execute('''
        mutation CreatePerson($input: CreatePersonInput!) {
            createPerson(input: $input) {
                ok
                errors  # Ask for the errors too
            }
        }
    ''', variable_values=variables)

Can you try adding errors to the query and see if they appear in result?

[yamila-moreno]

Holy cow! That was the problem!! I was just not seeing this.
Thank you for your help!!!