Split test_outstream in two

Author: davidbrochart

tests/test_io.py

@@ -101,7 +101,7 @@ async def test_background_socket(iopub_thread):
     sock.send(b"hi")
 
 
-async def test_outstream(iopub_thread):
+async def test_outstream1(iopub_thread):
     session = Session()
     pub = iopub_thread.socket
 
@@ -115,6 +115,9 @@ async def test_outstream(iopub_thread):
         stream = OutStream(session, iopub_thread, "stdout", watchfd=False)
         stream.close()
 
+
+async def test_outstream2(iopub_thread):
+    session = Session()
     stream = OutStream(session, iopub_thread, "stdout", isatty=True, echo=io.StringIO())
 
     with stream: