Don't get child_watcher if on Windows

Author: kevin-bates

.travis.yml

@@ -28,6 +28,7 @@ before_install:
 
 install:
     - pip install --pre .[test] $EXTRA_PIP
+    - pip install git+https://github.com/gateway-experiments/jupyter_kernel_mgmt.git@fix-windows
     - pip freeze
     - wget https://github.com/jgm/pandoc/releases/download/1.19.1/pandoc-1.19.1-1-amd64.deb && sudo dpkg -i pandoc-1.19.1-1-amd64.deb
 

appveyor.yml

@@ -4,7 +4,7 @@ matrix:
 
 environment:
   matrix:
-    - CONDA_PY: 36
+    - CONDA_PY: 37
       CONDA_INSTALL_LOCN: "C:\\Miniconda36-x64"
 
 platform:
@@ -17,8 +17,10 @@ install:
   - cmd: conda config --set show_channel_urls true
   - cmd: conda config --add channels conda-forge
   #- cmd: conda update --yes --quiet conda
+  #- cmd: conda install -y pyzmq tornado jupyter_kernel_mgmt nbformat nbconvert ipykernel pip nose
   - cmd: conda install -y pyzmq tornado jupyter_client nbformat nbconvert ipykernel pip nose
   - cmd: pip install .[test]
+  - cmd: pip install git+https://github.com/gateway-experiments/jupyter_kernel_mgmt.git@fix-windows
 
 test_script:
   - nosetests  -v jupyter_server --exclude-dir notebook\tests\selenium

jupyter_server/tests/launchserver.py

@@ -180,11 +180,12 @@ def start_thread():
                 started.set()
                 app.session_manager.close()
 
-        # The following is required for kernel api tests in order for asyncio.create_subprocess_exec()
-        # to work from tests - which requires that child_watcher be on the main thread.
-        # https://docs.python.org/3/library/asyncio-subprocess.html#subprocess-and-threads
-        asyncio.get_event_loop()
-        asyncio.get_child_watcher()
+        if not sys.platform.startswith("win"):
+            # The following is required for kernel api tests in order for asyncio.create_subprocess_exec()
+            # to work from tests - which requires that child_watcher be on the main thread.
+            # https://docs.python.org/3/library/asyncio-subprocess.html#subprocess-and-threads
+            asyncio.get_event_loop()
+            asyncio.get_child_watcher()
 
         cls.server_thread = Thread(target=start_thread)
         cls.server_thread.daemon = True