How do I pass data to a flask form using pytest? - flask

Question

I am struggling passing data to a form using pytest. I wish to pass the username and password to a login form. Here is what I have tried:
conftest.py
import pytest
from wahoo_connect import init_app, db
from wahoo_connect.models import User
from dotenv import load_dotenv
load_dotenv('.flaskenv')
#pytest.fixture(scope='module')
def app():
app = init_app()
with app.app_context():
db.create_all()
user = User(username='testuser', email='test#gmail.com', forename='Test', surname='User', confirmed=True)
user.set_password('testing')
db.session.add(user)
db.session.commit()
yield app
#pytest.fixture(scope='module')
def client(app):
return app.test_client()
this sets up a client fixture which is used by my test:
def test_index_page__logged_in(client):
with client:
formdata = {'username': 'testuser', 'password': 'testing', 'remember_me': False}
client.post('/auth/login', data=formdata)
assert current_user.username == 'testuser'
the route is defined in a blueprint as:
#auth_bp.route('/login', methods=['GET', 'POST'])
def login():
# Login route logic goes here
if current_user.is_authenticated:
return redirect(url_for('home_bp.index'))
form = LoginForm()
if form.validate_on_submit():
user = User.query.filter_by(username=form.username.data).first()
if user is None or not user.check_password(form.password.data):
flash('Invalid username or password', 'warning')
return redirect(url_for('auth_bp.login'))
login_user(user, remember=form.remember_me.data)
next_page = request.args.get('next')
if not next_page or url_parse(next_page).netloc != '':
next_page = url_for('home_bp.index')
return redirect(next_page)
return render_template('auth/login.html', title='Sign In', form=form)
and here is the form:
class LoginForm(FlaskForm):
username = StringField('Username', validators=[DataRequired()])
password = PasswordField('Password', validators=[DataRequired()])
remember_me = BooleanField('Remember Me')
submit = SubmitField('Sign In')
and the template:
{% extends "base.html" %}
{% block content %}
<div class="form-signin text-center">
<form action="" method="post" novalidate>
<h3>Please sign in</h3>
<div class="form-floating">
{{ form.username(type="text", class="form-control", id="floatingInput", placeholder="Username") }}
{% for error in form.username.errors %}
<span style="color: red;">[{{ error }}]</span>
{% endfor %}
<label for="floatingInput">{{ form.username.label.text }}</label>
</div>
<div class="form-floating">
{{ form.password(type="password", class="form-control", id="floatingPassword", placeholder="Password") }}
{% for error in form.password.errors %}
<span style="color: red;">[{{ error }}]</span>
{% endfor %}
<label for="floatingPassword">{{ form.password.label.text }}</label>
</div>
<div class="checkbox mb-3">
<label>
{{ form.remember_me() }} {{ form.remember_me.label.text }}
</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit">{{ form.submit.label.text }}</button>
{{ form.hidden_tag() }}
</form>
</div>
<p class="text-center">Forgot Your Password? Click to Reset</p>
<p class="text-center pt-3">Create an Account</p>
{% endblock %}
I can see the data before the "if form.validate_on_submit():" statement in the view and it is correct, but I can never get beyond this point in the submission process. I seem to be missing something!
Thank you
Martyn

Answer 1

It seems that I was missing an important flag:
WTF_CSRF_ENABLED = False
it now works!