Slow tests (#4435)

* Add integration for django-slowtest

* Sample test improvement

- Reduces test from 0.7s to 0.2s

* Run CI tests with slowreport

* Fix requirements file

* Fix test command

* Fix bulk_create in unit tests

* Remove bulk_create entirely

* remove another bulk_create call

* Reduce long test from ~1000 seconds to ~1 second

InvenTree/InvenTree/settings.py

@@ -32,15 +32,24 @@ INVENTREE_NEWS_URL = 'https://inventree.org/news/feed.atom'
 # Determine if we are running in "test" mode e.g. "manage.py test"
 TESTING = 'test' in sys.argv
 
-# Note: The following fix is "required" for docker build workflow
-# Note: 2022-12-12 still unsure why...
-if TESTING and os.getenv('INVENTREE_DOCKER'):
-    # Ensure that sys.path includes global python libs
-    site_packages = '/usr/local/lib/python3.9/site-packages'
+if TESTING:
 
-    if site_packages not in sys.path:
-        print("Adding missing site-packages path:", site_packages)
-        sys.path.append(site_packages)
+    # Use a weaker password hasher for testing (improves testing speed)
+    PASSWORD_HASHERS = ['django.contrib.auth.hashers.MD5PasswordHasher',]
+
+    # Enable slow-test-runner
+    TEST_RUNNER = 'django_slowtests.testrunner.DiscoverSlowestTestsRunner'
+    NUM_SLOW_TESTS = 25
+
+    # Note: The following fix is "required" for docker build workflow
+    # Note: 2022-12-12 still unsure why...
+    if os.getenv('INVENTREE_DOCKER'):
+        # Ensure that sys.path includes global python libs
+        site_packages = '/usr/local/lib/python3.9/site-packages'
+
+        if site_packages not in sys.path:
+            print("Adding missing site-packages path:", site_packages)
+            sys.path.append(site_packages)
 
 # Are environment variables manipulated by tests? Needs to be set by testing code
 TESTING_ENV = False
@@ -901,7 +910,6 @@ CUSTOM_LOGO = get_custom_file('INVENTREE_CUSTOM_LOGO', 'customize.logo', 'custom
 CUSTOM_SPLASH = get_custom_file('INVENTREE_CUSTOM_SPLASH', 'customize.splash', 'custom splash')
 
 CUSTOMIZE = get_setting('INVENTREE_CUSTOMIZE', 'customize', {})
-
 if DEBUG:
     logger.info("InvenTree running with DEBUG enabled")
 

InvenTree/part/test_api.py

@@ -2957,17 +2957,28 @@ class PartStocktakeTest(InvenTreeAPITestCase):
 
         total = 0
 
-        # Create some entries
-        for p in Part.objects.all():
+        # Iterate over (up to) 5 parts in the database
+        for p in Part.objects.all()[:5]:
 
-            for n in range(p.pk):
-                PartStocktake.objects.create(
-                    part=p,
-                    quantity=(n + 1) * 100,
+            # Create some entries
+            to_create = []
+
+            n = p.pk % 10
+
+            for idx in range(n):
+                to_create.append(
+                    PartStocktake(
+                        part=p,
+                        quantity=(idx + 1) * 100,
+                    )
                 )
 
-            total += p.pk
+                total += 1
 
+            # Create all entries in a single bulk-create
+            PartStocktake.objects.bulk_create(to_create)
+
+            # Query list endpoint
             response = self.get(
                 url,
                 {
@@ -2976,8 +2987,8 @@ class PartStocktakeTest(InvenTreeAPITestCase):
                 expected_code=200,
             )
 
-            # List by part ID
-            self.assertEqual(len(response.data), p.pk)
+            # Check that the expected number of PartStocktake instances has been created
+            self.assertEqual(len(response.data), n)
 
         # List all entries
         response = self.get(url, {}, expected_code=200)

InvenTree/part/test_category.py

@@ -256,8 +256,6 @@ class CategoryTest(TestCase):
 
         # At this point, we are confident that the tree is correctly structured
 
-        # Add some parts to category B3
-
         for i in range(10):
             Part.objects.create(
                 name=f'Part {i}',