Correctly maintain the window size.

Author: Lukasa

hyper/http20/window.py

@@ -87,6 +87,7 @@ def _handle_frame(self, frame_size):
         """
         rc = self.increase_window_size(frame_size)
         self.window_size -= frame_size
+        self.window_size += rc
         return rc
 
 

test/test_windowmanager.py

@@ -32,7 +32,7 @@ def test_base_manager_private_interface_doesnt_function(self):
     def test_base_manager_decrements_window_size(self):
         class TestFCM(BaseFlowControlManager):
             def increase_window_size(self, frame_size):
-                pass
+                return 0
 
         b = TestFCM(10, 10)
         b._handle_frame(5)
@@ -49,4 +49,4 @@ def test_fcm_returns_whats_given(self):
         b = FlowControlManager(100, 100)
         assert b._handle_frame(10) == 10
         assert b._handle_frame(30) == 30
-        assert b.window_size == 60
+        assert b.window_size == 100