From 40495a961fda709f777871066a81992c75614b09 Mon Sep 17 00:00:00 2001
From: Roman Mogylatov <rmogilatov@gmail.com>
Date: Sun, 27 Sep 2020 22:59:44 -0400
Subject: [PATCH] Add test for wiring config invariant

---
 tests/unit/wiring/module.py           |  4 ++++
 tests/unit/wiring/test_wiring_py36.py | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/tests/unit/wiring/module.py b/tests/unit/wiring/module.py
index a8df06f1..8ac15f8c 100644
--- a/tests/unit/wiring/module.py
+++ b/tests/unit/wiring/module.py
@@ -43,3 +43,7 @@ def test_provided_instance(some_value: int = Provide[Container.service.provided.
 
 def test_subcontainer_provider(some_value: int = Provide[Container.sub.int_object]):
     return some_value
+
+
+def test_config_invariant(some_value: int = Provide[Container.config.option[Container.config.switch]]):
+    return some_value
diff --git a/tests/unit/wiring/test_wiring_py36.py b/tests/unit/wiring/test_wiring_py36.py
index a4d44a4d..1d008a0c 100644
--- a/tests/unit/wiring/test_wiring_py36.py
+++ b/tests/unit/wiring/test_wiring_py36.py
@@ -76,3 +76,21 @@ class WiringTest(unittest.TestCase):
     def test_subcontainer(self):
         some_value = module.test_subcontainer_provider()
         self.assertEqual(some_value, 1)
+
+    def test_config_invariant(self):
+        config = {
+            'option': {
+                'a': 1,
+                'b': 2,
+            },
+            'switch': 'a',
+        }
+        self.container.config.from_dict(config)
+
+        with self.container.config.switch.override('a'):
+            value_a = module.test_config_invariant()
+        self.assertEqual(value_a, 1)
+
+        with self.container.config.switch.override('b'):
+            value_b = module.test_config_invariant()
+        self.assertEqual(value_b, 2)