From 69448365c4506dc17246878b1f5def1c017c3000 Mon Sep 17 00:00:00 2001
From: Damien Elmes <gpg@ankiweb.net>
Date: Mon, 22 Feb 2021 20:05:10 +1000
Subject: [PATCH] move test code behind env var

---
 pylib/anki/collection.py | 6 +++++-
 pylib/anki/scheduler.py  | 5 +++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/pylib/anki/collection.py b/pylib/anki/collection.py
index 315bbdf2f..a1535ad79 100644
--- a/pylib/anki/collection.py
+++ b/pylib/anki/collection.py
@@ -30,6 +30,7 @@ from anki.media import MediaManager, media_paths_from_col_path
 from anki.models import ModelManager
 from anki.notes import Note
 from anki.sched import Scheduler as V1Scheduler
+from anki.scheduler import Scheduler as V2TestScheduler
 from anki.schedv2 import Scheduler as V2Scheduler
 from anki.sync import SyncAuth, SyncOutput, SyncStatus
 from anki.tags import TagManager
@@ -138,7 +139,10 @@ class Collection:
         if ver == 1:
             self.sched = V1Scheduler(self)
         elif ver == 2:
-            self.sched = V2Scheduler(self)
+            if os.getenv("TEST_SCHEDULER"):
+                self.sched = V2TestScheduler(self)  # type: ignore
+            else:
+                self.sched = V2Scheduler(self)
 
     def upgrade_to_v2_scheduler(self) -> None:
         self._backend.upgrade_scheduler()
diff --git a/pylib/anki/scheduler.py b/pylib/anki/scheduler.py
index a73bd83a0..324dc2ebd 100644
--- a/pylib/anki/scheduler.py
+++ b/pylib/anki/scheduler.py
@@ -1,6 +1,11 @@
 # Copyright: Ankitects Pty Ltd and contributors
 # License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
+"""
+This file contains experimental scheduler changes, and is not currently
+used by Anki.
+"""
+
 from __future__ import annotations
 
 import pprint