test_forms

import shutil
import tempfile

from django.conf import settings
from django.contrib.auth import get_user_model
from django.test import Client, TestCase, override_settings
from django.urls import reverse

from posts.forms import PostForm
from posts.models import Group, Post

TEMP_MEDIA_ROOT = tempfile.mkdtemp(dir=settings.BASE_DIR)
User = get_user_model()


@override_settings(MEDIA_ROOT=TEMP_MEDIA_ROOT)
class PostCreateFormTests(TestCase):
    @classmethod
    def setUpClass(cls):
        super().setUpClass()

        cls.user = User.objects.create_user(username='HasNoName')

        cls.group = Group.objects.create(
            title='Тестовый заголовок',
            description='Тестовое описание',
            slug='test-slug',
        )

        cls.post = Post.objects.create(
            author=cls.user,
            text='Post text for TEST',
            group=cls.group,
        )

        cls.form = PostForm()

    @classmethod
    def tearDownClass(cls):
        super().tearDownClass()
        shutil.rmtree(TEMP_MEDIA_ROOT, ignore_errors=True)

    def setUp(self):
        self.authorized_client = Client()
        self.authorized_client.force_login(self.user)

    def test_create_post(self):
        """Валидная форма создает запись в Post."""
        posts_count = Post.objects.count()

        form_data = {
            'text': 'Post text for TEST',
            'group': self.group.pk,
        }
        response = self.authorized_client.post(
            reverse('posts:post_create'),
            data=form_data,
            follow=True
        )

        self.assertRedirects(response, reverse('posts:profile', kwargs={
            'username': self.user}))
        self.assertEqual(Post.objects.count(), posts_count + 1)
        self.assertTrue(Post.objects.latest('id'))

    def test_edit_post(self):
        form_data = {
            'author': self.post.author.username,
            'text': 'Post text for TEST',
            'group': self.group.pk,
        }
        response = self.authorized_client.post(
            reverse('posts:post_edit', kwargs={'post_id': self.post.pk}),
            data=form_data,
            follow=True
        )
        self.assertRedirects(
            response, reverse(
                'posts:post_detail', kwargs={'post_id': self.post.pk})
        )
        self.assertTrue(self.post)