Contexts are experimental

Change-Id: I450ace29716a81eacb1b1c5b9326cada9ff516c4

CHANGELOG.md

 # v2.24.2
 
 * added DeferredValue
+* satella.coding.Context are considered experimental
 

satella/__init__.py

-__version__ = '2.24.2a2'
+__version__ = '2.24.2a3'

satella/coding/environment.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import threading
 import typing as tp
+import warnings
 
 from satella.coding.typing import V
 
@@ -13,9 +14,12 @@ THEY_HATIN = object()
 class Context:
     """
     New layer of environment. Can have it's own variables, or can hoist them onto the parent.
+
+    .. warning:: This is considered experimental. I just haven't found out a good use case for it yet.
     """
 
     def __init__(self, parent: tp.Optional[Context] = None, **variables):
+        warnings.warn('This is experimental', RuntimeWarning)
         self.parent = parent
         self.variables = variables
         self.bool = None

satella/debug/test_environment.py → tests/test_coding/test_environment.py

+import threading
 import unittest
 
 from satella.coding.environment import Context
@@ -12,6 +13,19 @@ class TestEnvs(unittest.TestCase):
         with Context() as new_ctxt:
             self.assertEqual(new_ctxt.value, 5)
 
+    def test_threads(self):
+        ctxt = Context.get()
+        ctxt.value = 2
+        with ctxt:
+            def thread():
+                with Context() as new_ctxt:
+                    self.assertEqual(new_ctxt.value, 2)
+                    new_ctxt.value2 = 2
+            thr = threading.Thread(target=thread)
+            thr.start()
+            thr.join()
+            self.assertRaises(AttributeError, lambda: ctxt.value2)
+
     def test_push(self):
         ctxt = Context.get()
         ctxt.value = 5