docs: document how flags can be toggled in tests

docs/testing.md

@@ -0,0 +1,36 @@
+# Testing
+
+## Testing code that depends on flags
+
+Because `FLAGS` are definable in Django settings, you can use Django's standard `override_settings` to test with a flag off and on.
+
+```python
+from django.test import TestCase, override_settings
+
+class FlaggedCodeTestCase(TestCase):
+    @override_settings(FLAGS={"MY_FLAG": [("boolean", True)]})
+    def test_flag_enabled(self):
+        # Do the thing that requires the flag to be enabled
+
+    @override_settings(FLAGS={"MY_FLAG": [("boolean", False)]})
+    def test_flag_disabled(self):
+        # Do the thing that requires the flag to be disabled
+```
+
+Alternatively, you can create a `FlagState` object along the same lines with a boolean condition that is `True` to test the flag-enabled code path, and then create one with a boolean condition that is` False` to test the not-enabled path.
+
+
+```python
+class FlaggedCodeTestCase(TestCase):
+    def test_flag_enabled(self):
+        FlagState.objects.create(
+            name="MY_FLAG", condition="boolean", value="True"
+        )
+        # Do the thing that requires the flag to be enabled
+
+    def test_flag_disabled(self):
+        FlagState.objects.create(
+            name="MY_FLAG", condition="boolean", value="True"
+        )
+        # Do the thing that requires the flag to be disabled
+```

docs/usage.md

@@ -65,4 +65,22 @@ urlpatterns = [
 ]
 ```
 
+## Testing with flags
+
+A test case that covers both values of the flag may look like this:
+
+```python
+from django.test import TestCase, override_settings
+
+class FlaggedCodeTestCase(TestCase):
+    @override_settings(FLAGS={"MY_FLAG": [("boolean", True)]})
+    def test_flag_enabled(self):
+        # Do the thing that requires the flag to be enabled
+
+    @override_settings(FLAGS={"MY_FLAG": [("boolean", False)]})
+    def test_flag_disabled(self):
+        # Do the thing that requires the flag to be disabled
+```
+
+
 See the [API reference](/api/state) for more details and examples.

mkdocs.yml

@@ -5,6 +5,7 @@ nav:
     - Getting started: index.md
     - Usage guide: usage.md
     - Debugging: debugging.md
+    - Testing: testing.md
     - Settings: settings.md
     - Conditions: conditions.md
     - Management commands: management_commands.md