Add pauses to efactor operations to fix tests repeatability

src/connectors/efactor.c

@@ -277,6 +277,8 @@ efactor_download (struct backend *backend, const gchar * src_path,
  err = -ECANCELED;
  }
 
+ sleep (1);
+
  return err;
 }
 
@@ -353,6 +355,8 @@ efactor_upload (struct backend *backend, const gchar * path,
  }
 
 end:
+ sleep (1);
+
  return err;
 }
 
@@ -408,6 +412,9 @@ efactor_rename (struct backend *backend, const gchar * src, const gchar * dst)
  err = -EIO;
  free_msg (rx_msg);
  }
+
+ sleep (1);
+
  return err;
 }
 
@@ -474,7 +481,7 @@ efactor_destroy_data (struct backend *backend)
  backend_destroy_data (backend);
 }
 
-//We are replicanting the functionality in backend because the request is standard but the response is not.
+//We are replicanting the functionality in the backend because the request is standard but the response is not.
 gint
 efactor_handshake (struct backend *backend)
 {
@@ -484,8 +491,12 @@ efactor_handshake (struct backend *backend)
  GByteArray *tx_msg;
  GByteArray *rx_msg;
 
+ //Sometimes it takes a lot of time to receive the response to the MIDI identity request.
+ //As the backend is already asking for it, we need to ensure that the input buffer is empty before continuing.
+ //With these two calls, the total timeout including the backend handshake is 2.5 s, which is empirically enough.
  g_mutex_lock (&backend->mutex);
  backend_rx_drain (backend);
+ backend_rx_drain (backend);
  g_mutex_unlock (&backend->mutex);
 
  tx_msg = g_byte_array_sized_new (sizeof (MIDI_IDENTITY_REQUEST));