Removed the Requirement to Install Python and NodeJS (Now Bundled with Borealis)

Dependencies/Python/Lib/test/test_asyncio/test_threads.py

@@ -0,0 +1,66 @@
+"""Tests for asyncio/threads.py"""
+
+import asyncio
+import unittest
+
+from contextvars import ContextVar
+from unittest import mock
+
+
+def tearDownModule():
+    asyncio.set_event_loop_policy(None)
+
+
+class ToThreadTests(unittest.IsolatedAsyncioTestCase):
+    async def test_to_thread(self):
+        result = await asyncio.to_thread(sum, [40, 2])
+        self.assertEqual(result, 42)
+
+    async def test_to_thread_exception(self):
+        def raise_runtime():
+            raise RuntimeError("test")
+
+        with self.assertRaisesRegex(RuntimeError, "test"):
+            await asyncio.to_thread(raise_runtime)
+
+    async def test_to_thread_once(self):
+        func = mock.Mock()
+
+        await asyncio.to_thread(func)
+        func.assert_called_once()
+
+    async def test_to_thread_concurrent(self):
+        calls = []
+        def func():
+            calls.append(1)
+
+        futs = []
+        for _ in range(10):
+            fut = asyncio.to_thread(func)
+            futs.append(fut)
+        await asyncio.gather(*futs)
+
+        self.assertEqual(sum(calls), 10)
+
+    async def test_to_thread_args_kwargs(self):
+        # Unlike run_in_executor(), to_thread() should directly accept kwargs.
+        func = mock.Mock()
+
+        await asyncio.to_thread(func, 'test', something=True)
+
+        func.assert_called_once_with('test', something=True)
+
+    async def test_to_thread_contextvars(self):
+        test_ctx = ContextVar('test_ctx')
+
+        def get_ctx():
+            return test_ctx.get()
+
+        test_ctx.set('parrot')
+        result = await asyncio.to_thread(get_ctx)
+
+        self.assertEqual(result, 'parrot')
+
+
+if __name__ == "__main__":
+    unittest.main()