1 files changed, 40 insertions, 0 deletions
diff --git a/dev-python/txaio/files/util.py b/dev-python/txaio/files/util.py
new file mode 100644
index 000000000000..254df70a5aac
--- /dev/null
+++ b/dev-python/txaio/files/util.py
@@ -0,0 +1,40 @@
+try:
+    import asyncio
+    from asyncio.test_utils import run_once as _run_once
+
+    def run_once():
+        return _run_once(asyncio.get_event_loop())
+
+except ImportError as e:
+    try:
+        import trollius as asyncio
+    except ImportError:
+        asyncio = None
+
+    def run_once():
+        '''
+        copied from asyncio.testutils because trollius has no
+        "testutils"
+        '''
+        # in Twisted, this method is a no-op
+        if asyncio is None:
+            return
+
+        # just like modern asyncio.testutils.run_once does it...
+        loop = asyncio.get_event_loop()
+        loop.stop()
+        loop.run_forever()
+        asyncio.gather(*asyncio.Task.all_tasks())
+
+
+try:
+    # XXX fixme hack better way to detect twisted
+    # (has to work on py3 where asyncio exists always, though)
+    import twisted  # noqa
+
+    def await(_):
+        return
+
+except ImportError:
+    def await(future):
+        asyncio.get_event_loop().run_until_complete(future)