[Python] Unit Tests for FLASK API

I have a basic flask API running :

@app.route('/helloworld', methods = ['GET'])
def first_api():
hname = "hello"
lhname = "world"
print(hname+lhanme)


Now I need to add some unit tests to it, and here is my unit test file:

import json
def test_index(app, client):
res = client.get('/helloworld')
assert res.status_code == 200
assert "hello" in res.data


How can I pass value for variables hname and lhname from this unit test?

Here is my conf file for pytest:

import pytest
from app import app as flask_app

@pytest.fixture
def app():
return flask_app

@pytest.fixture
def client(app):
return app.test_client()

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