Add test to ClientResizeViewPort

pwd/broadcast_mock_test.go

@@ -3,10 +3,18 @@ package pwd
 import "net/http"
 
 type mockBroadcast struct {
+	broadcastTo func(sessionId, eventName string, args ...interface{})
+	getHandler  func() http.Handler
 }
 
 func (m *mockBroadcast) BroadcastTo(sessionId, eventName string, args ...interface{}) {
+	if m.broadcastTo != nil {
+		m.broadcastTo(sessionId, eventName, args...)
+	}
 }
 func (m *mockBroadcast) GetHandler() http.Handler {
+	if m.getHandler != nil {
+		return m.getHandler()
+	}
 	return nil
 }