Steps and entrypoint to yield control from Kapow! handlers

spec/test/features/environment.py

@@ -1,4 +1,24 @@
+import tempfile
+import os
+
+
+def before_scenario(context, scenario):
+    # Create the request_handler FIFO
+    while True:
+        context.handler_fifo_path = tempfile.mktemp() # Safe because using
+                                                      # mkfifo
+        try:
+            os.mkfifo(context.handler_fifo_path)
+        except OSError:
+            # The file already exist
+            pass
+        else:
+            break
+
+
 def after_scenario(context, scenario):
     if hasattr(context, 'server'):
         context.server.terminate()
         context.server.wait()
+
+    os.unlink(context.handler_fifo_path)