這個是套路，

有了這些測試用例，

開發就會更有保障，

且每次重寫，都好麻煩，

不好cp來得快~~：）

from django.test import TestCase
from django.urls import reverse, resolve
from django.contrib.auth.models import User
from accounts.views import signup
from accounts.forms import SignUpForm

# Create your tests here.


class SignUpTests(TestCase):
    
 
def setUp(self):
        url = reverse('signup')
        self.response = self.client.get(url)

    def test_signup_status_code(self):

        self.assertEqual(self.response.status_code, 200)

    def test_signup_url_resolves_signup_view(self):
        view = resolve('/signup/')
        self.assertEqual(view.func, signup)

    
 
def test_csrf(self):
        self.assertContains(self.response, 'csrfmiddlewaretoken')

    def test_contains_form(self):
        form = self.response.context.get('form')
        self.assertIsInstance(form, SignUpForm)

    def test_form_inputs(self):
        self.assertContains(self.response, 
 
'<input', 5)
        self.assertContains(self.response, 'type="text"', 1)
        self.assertContains(self.response, 'type="email"', 1)
        self.assertContains(self.response, 'type="password"', 2)


class SuccessfulSignUpTests(TestCase):
    def setUp(self):
        url = reverse('signup')
        data = {
            'username': 'john',
            'email': '[email protected]',
            'password1': '123456',
            'password2': '123456'
        }
        self.response = self.client.post(url, data)
        self.home_url = reverse('home')

    def test_redirection(self):
        self.assertRedirects(self.response, self.home_url)

    def test_user_creation(self):
        self.assertTrue(User.objects.exists())

    def test_user_authentication(self):
        response = self.client.get(self.home_url)
        user = response.context.get('user')
        self.assertTrue(user.is_authenticated)


class InvalidSignUpTests(TestCase):
    def setUp(self):
        url = reverse('signup')
        self.response = self.client.post(url, {})

    def test_signup_status_code(self):
        self.assertEqual(self.response.status_code, 200)

    def test_form_errors(self):
        form = self.response.context.get('form')
        self.assertTrue(form.errors)

    def test_do_not_create_user(self):
        self.assertFalse(User.objects.exists())