added additional tests for run_sync

Author: dantownsend

tests/utils/test_sync.py

@@ -0,0 +1,34 @@
+import asyncio
+from unittest import TestCase
+
+from piccolo.utils.sync import run_sync
+
+
+class TestSync(TestCase):
+    def test_sync_simple(self):
+        """
+        Test calling a simple coroutine.
+        """
+        run_sync(asyncio.sleep(0.1))
+
+    def test_sync_nested(self):
+        """
+        Test calling a coroutine, which contains a call to `run_sync`.
+        """
+
+        async def test():
+            run_sync(asyncio.sleep(0.1))
+
+        run_sync(test())
+
+    def test_sync_stopped_event_loop(self):
+        """
+        Test calling a coroutine, when the current thread has an event loop,
+        but it isn't running.
+        """
+        loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
+
+        run_sync(asyncio.sleep(0.1))
+
+        asyncio.set_event_loop(None)