Add password change view (#168)

bookmarks/tests/test_password_change_view.py

@@ -0,0 +1,55 @@
+from django.contrib.auth.models import User
+from django.test import TestCase
+from django.urls import reverse
+
+from bookmarks.tests.helpers import BookmarkFactoryMixin
+
+
+class PasswordChangeViewTestCase(TestCase, BookmarkFactoryMixin):
+    def setUp(self) -> None:
+        self.user = User.objects.create_user('testuser', 'test@example.com', 'initial_password')
+        self.client.force_login(self.user)
+
+    def test_change_password(self):
+        form_data = {
+            'old_password': 'initial_password',
+            'new_password1': 'new_password',
+            'new_password2': 'new_password',
+        }
+
+        response = self.client.post(reverse('change_password'), form_data)
+
+        self.assertRedirects(response, reverse('password_change_done'))
+
+    def test_change_password_done(self):
+        form_data = {
+            'old_password': 'initial_password',
+            'new_password1': 'new_password',
+            'new_password2': 'new_password',
+        }
+
+        response = self.client.post(reverse('change_password'), form_data, follow=True)
+
+        self.assertContains(response, 'Your password was changed successfully')
+
+    def test_should_return_error_for_invalid_old_password(self):
+        form_data = {
+            'old_password': 'wrong_password',
+            'new_password1': 'new_password',
+            'new_password2': 'new_password',
+        }
+
+        response = self.client.post(reverse('change_password'), form_data)
+
+        self.assertIn('old_password', response.context_data['form'].errors)
+
+    def test_should_return_error_for_mismatching_new_password(self):
+        form_data = {
+            'old_password': 'initial_password',
+            'new_password1': 'new_password',
+            'new_password2': 'wrong_password',
+        }
+
+        response = self.client.post(reverse('change_password'), form_data)
+
+        self.assertIn('new_password2', response.context_data['form'].errors)