Set port during tests

- jupyterhub#139 changes port handling, this makes tests pass.
- Sets attribute mock_port, which gets used during the port polling phase.

batchspawner/batchspawner.py

@@ -375,6 +375,10 @@ def start(self):
         self.ip = self.state_gethost()
         while self.port == 0:
             yield gen.sleep(self.startup_poll_interval)
+            # Test framework: For testing, mock_port is set because we
+            # don't actually run the single-user server yet.
+            if hasattr(self, 'mock_port'):
+                self.port = self.mock_port
 
         if jupyterhub.version_info < (0,7):
             # store on user for pre-jupyterhub-0.7:

batchspawner/tests/test_spawners.py

@@ -64,7 +64,7 @@ def new_spawner(db, spawner_class=BatchDummy, **kwargs):
         kwargs.setdefault('server', server)
     kwargs.setdefault('hub', hub)
     kwargs.setdefault('user', user)
-    kwargs.setdefault('current_port', testport)
+    kwargs.setdefault('mock_port', testport)
     kwargs.setdefault('INTERRUPT_TIMEOUT', 1)
     kwargs.setdefault('TERM_TIMEOUT', 1)
     kwargs.setdefault('KILL_TIMEOUT', 1)