test: each app keeps its tests in a tests package

131 test modules sat next to the code they test; instances alone had
51 of them beside views.py and utils.py. They move into a
tests/ package per app, and the JavaScript checks into
webvirtcloud/tests/js. Each non-empty tests.py becomes tests/test_views.py;
the empty generated stubs are removed.

Imports of the app's own modules become absolute, paths built from
__file__ go one level up, the live helper is instances.tests.livetest,
and coverage omits */tests/*. The suite discovers the same 960 tests as
before.

admin/tests.py

@@ -1,134 +0,0 @@
-from django.contrib.auth.models import Group, User
-from django.core.exceptions import ObjectDoesNotExist
-from django.shortcuts import reverse
-from django.test import RequestFactory, TestCase
-
-from accounts.models import UserAttributes
-
-
-class AdminTestCase(TestCase):
-    def setUp(self):
-        self.client.login(request=RequestFactory().get("/"), username="admin", password="admin")
-
-    def test_group_list(self):
-        response = self.client.get(reverse("admin:group_list"))
-        self.assertEqual(response.status_code, 200)
-
-    def test_groups(self):
-        response = self.client.get(reverse("admin:group_create"))
-        self.assertEqual(response.status_code, 200)
-
-        response = self.client.post(
-            reverse("admin:group_create"), {"name": "Test Group"}
-        )
-        self.assertRedirects(response, reverse("admin:group_list"))
-
-        group = Group.objects.get(name="Test Group")
-        group_id = group.id
-
-        response = self.client.get(reverse("admin:group_update", args=[group_id]))
-        self.assertEqual(response.status_code, 200)
-
-        response = self.client.post(
-            reverse("admin:group_update", args=[group_id]), {"name": "Updated Group Test"}
-        )
-        self.assertRedirects(response, reverse("admin:group_list"))
-
-        group = Group.objects.get(id=group_id)
-        self.assertEqual(group.name, "Updated Group Test")
-
-        response = self.client.get(reverse("admin:group_delete", args=[group_id]))
-        self.assertEqual(response.status_code, 200)
-
-        response = self.client.post(reverse("admin:group_delete", args=[group_id]))
-        self.assertRedirects(response, reverse("admin:group_list"))
-
-        with self.assertRaises(ObjectDoesNotExist):
-            Group.objects.get(id=group_id)
-
-    def test_user_list(self):
-        response = self.client.get(reverse("admin:user_list"))
-        self.assertEqual(response.status_code, 200)
-
-    def test_users(self):
-        response = self.client.get(reverse("admin:user_create"))
-        self.assertEqual(response.status_code, 200)
-
-        response = self.client.post(
-            reverse("admin:user_create"),
-            {
-                "username": "test",
-                "password": "test",
-                "max_instances": 1,
-                "max_cpus": 1,
-                "max_memory": 1024,
-                "max_disk_size": 4,
-            },
-        )
-        self.assertRedirects(response, reverse("admin:user_list"))
-
-        user = User.objects.get(username="test")
-        user_id = user.id
-
-        ua: UserAttributes = UserAttributes.objects.get(user_id=user_id)
-        self.assertEqual(ua.user_id, user_id)
-        self.assertEqual(ua.max_instances, 1)
-        self.assertEqual(ua.max_cpus, 1)
-        self.assertEqual(ua.max_memory, 1024)
-        self.assertEqual(ua.max_disk_size, 4)
-
-        response = self.client.get(reverse("admin:user_update", args=[user_id]))
-        self.assertEqual(response.status_code, 200)
-
-        response = self.client.post(
-            reverse("admin:user_update", args=[user_id]),
-            {
-                "username": "utest",
-                "max_instances": 2,
-                "max_cpus": 2,
-                "max_memory": 2048,
-                "max_disk_size": 8,
-            },
-        )
-        self.assertRedirects(response, reverse("admin:user_list"))
-
-        user = User.objects.get(id=user_id)
-        self.assertEqual(user.username, "utest")
-
-        ua = UserAttributes.objects.get(user_id=user_id)
-        self.assertEqual(ua.user_id, user_id)
-        self.assertEqual(ua.max_instances, 2)
-        self.assertEqual(ua.max_cpus, 2)
-        self.assertEqual(ua.max_memory, 2048)
-        self.assertEqual(ua.max_disk_size, 8)
-
-        # Blocking changes state, so a GET (e.g. an <img> tag) must not do it.
-        User.objects.filter(id=user_id).update(is_active=True)
-        response = self.client.get(reverse("admin:user_block", args=[user_id]))
-        self.assertEqual(response.status_code, 405)
-        self.assertTrue(User.objects.get(id=user_id).is_active)
-
-        response = self.client.post(reverse("admin:user_block", args=[user_id]))
-        user = User.objects.get(id=user_id)
-        self.assertFalse(user.is_active)
-
-        response = self.client.get(reverse("admin:user_unblock", args=[user_id]))
-        self.assertEqual(response.status_code, 405)
-        self.assertFalse(User.objects.get(id=user_id).is_active)
-
-        response = self.client.post(reverse("admin:user_unblock", args=[user_id]))
-        user = User.objects.get(id=user_id)
-        self.assertTrue(user.is_active)
-
-        response = self.client.get(reverse("admin:user_delete", args=[user_id]))
-        self.assertEqual(response.status_code, 200)
-
-        response = self.client.post(reverse("admin:user_delete", args=[user_id]))
-        self.assertRedirects(response, reverse("admin:user_list"))
-
-        with self.assertRaises(ObjectDoesNotExist):
-            User.objects.get(id=user_id)
-
-    def test_logs(self):
-        response = self.client.get(reverse("admin:logs"))
-        self.assertEqual(response.status_code, 200)