should fix issue #760 (#807)

Co-authored-by: Eduard Bröcker <[email protected]>

src/canmatrix/canmatrix.py

@@ -1321,6 +1321,7 @@ def update_receiver(self):  # type: () -> None
         """
         Collect Frame receivers out of receiver given in each signal. Add them to `self.receiver` list.
         """
+        self.receivers = []
         for sig in self.signals:
             for receiver in sig.receivers:
                 self.add_receiver(receiver)

tests/test_canmatrix.py

@@ -987,6 +987,21 @@ def test_canmatrix_rename_ecu_by_wrong_name(empty_matrix):
     assert ecu.name == "old_name"
 
 
+def test_canmatrix_rename_ecu_check_frame(empty_matrix):
+    ecu = canmatrix.Ecu(name="old_name")
+    frame = canmatrix.Frame(name="test_frame")
+    signal = canmatrix.Signal(name="test_signal")
+    signal.add_receiver("old_name")
+    frame.add_signal(signal)
+    frame.update_receiver()
+    assert "old_name" in frame.receivers
+
+    empty_matrix.add_ecu(ecu)
+    empty_matrix.add_frame(frame)
+    empty_matrix.rename_ecu("old_name", "new_name")
+    assert "old_name" not in frame.receivers
+    assert "new_name" in frame.receivers
+
 def test_canmatrix_rename_ecu_by_instance(empty_matrix):
     ecu = canmatrix.Ecu(name="old_name")
     empty_matrix.add_ecu(ecu)