test_forms.py

from django.test import TestCase
from django.contrib.auth.models import User

from todo.models import Todo

from ..forms import UserForm, TodoForm

REQUIRED_FIELD_ERROR = "This field is required."


class TestUserForm(TestCase):
    def test_negative_register_empty_data_is_valid(self):
        form = UserForm()
        self.assertFalse(form.is_valid())

    def test_negative_register_empty_data_error_message(self):
        form = UserForm(data={"username": "", "password": ""})
        self.assertEqual(form.errors["username"][0], REQUIRED_FIELD_ERROR)
        self.assertEqual(form.errors["password"][0], REQUIRED_FIELD_ERROR)

    def test_negative_register_empty_username_is_valid(self):
        form = UserForm(data={"username": "", "password": "testpassword"})
        self.assertFalse(form.is_valid())

    def test_negative_register_empty_username_error_message(self):
        form = UserForm(data={"username": "", "password": "testpassword"})
        self.assertEqual(form.errors["username"][0], REQUIRED_FIELD_ERROR)
        self.assertFalse("password" in form.errors)

    def test_negative_register_empty_password_is_valid(self):
        form = UserForm(data={"username": "testuser", "password": ""})
        self.assertFalse(form.is_valid())

    def test_negative_register_empty_password_error_message(self):
        form = UserForm(data={"username": "testuser", "password": ""})
        self.assertEqual(form.errors["password"][0], REQUIRED_FIELD_ERROR)
        self.assertFalse("username" in form.errors)

    def test_positive_register_valid_data(self):
        form = UserForm(data={"username": "testuser", "password": "testpassword"})
        self.assertTrue(form.is_valid())


class TestTodoForm(TestCase):
    def setUp(self) -> None:
        user = User(username="testuser")
        user.set_password("testpassword")
        user.save()

        self.user = user

    def test_negative_create_todo_empty_data_is_valid(self):
        form = TodoForm()
        self.assertFalse(form.is_valid())

    def test_negative_create_todo_empty_data_error_message(self):
        form = TodoForm(data={"title": "", "description": "", "user": None})
        self.assertEqual(form.errors["title"][0], REQUIRED_FIELD_ERROR)
        self.assertEqual(form.errors["description"][0], REQUIRED_FIELD_ERROR)
        self.assertEqual(form.errors["user"][0], REQUIRED_FIELD_ERROR)

    def test_negative_create_todo_empty_title_is_valid(self):
        form = TodoForm(data={"title": "", "description": "test", "user": self.user})
        self.assertFalse(form.is_valid())

    def test_negative_create_todo_empty_title_error_message(self):
        form = TodoForm(data={"title": "", "description": "test", "user": self.user})
        self.assertEqual(form.errors["title"][0], REQUIRED_FIELD_ERROR)
        self.assertFalse("description" in form.errors)
        self.assertFalse("user" in form.errors)

    def test_negative_create_todo_empty_description_is_valid(self):
        form = TodoForm(data={"title": "test", "description": "", "user": self.user})
        self.assertFalse(form.is_valid())

    def test_negative_create_todo_empty_description_error_message(self):
        form = TodoForm(data={"title": "test", "description": "", "user": self.user})
        self.assertEqual(form.errors["description"][0], REQUIRED_FIELD_ERROR)
        self.assertFalse("title" in form.errors)
        self.assertFalse("user" in form.errors)

    def test_negative_create_todo_empty_user_is_valid(self):
        form = TodoForm(data={"title": "test", "description": "test", "user": None})
        self.assertFalse(form.is_valid())

    def test_negative_create_todo_empty_user_error_message(self):
        form = TodoForm(data={"title": "test", "description": "test", "user": None})
        self.assertEqual(form.errors["user"][0], REQUIRED_FIELD_ERROR)
        self.assertFalse("title" in form.errors)
        self.assertFalse("description" in form.errors)

    def test_positive_create_todo(self):
        form = TodoForm(
            data={"title": "test", "description": "test", "user": self.user}
        )
        self.assertTrue(form.is_valid())

        return form.save()