TST: Update annunciate test to check for bell character in stdout

slam/alarm_tree_model.py

@@ -149,11 +149,11 @@ def update_item(self, name: str, path: str, severity: AlarmSeverity, status: str
                 item_to_update.filtered = True
             elif item_to_update.filtered:
                 item_to_update.filtered = False
-            print ('Status: ', status)
-            print ('Annunicating: ', item_to_update.annunciating)
             if (status != "OK" and status != "Disabled" ) and item_to_update.annunciating:
-                print ("!!!alarm tripped for: ", name, ", is annunciating: ", item_to_update.annunciating)
+                # prints bell character, cross platform way to generate "beep" noise,
+                # could be replaced with call to audio library for more sound options
                 print ('\a')
+
         self.layoutChanged.emit()
 
     def update_model(self, item_path: str, values: dict) -> None:

slam/tests/test_alarm_tree_model.py

@@ -140,20 +140,23 @@ def test_annunciation(tree_model):
     tree_model.nodes.append(alarm_item)
     tree_model.added_paths['TEST:PV'] = ['/path/to/TEST:PV']
 
-    # Create a StringIO object to capture stdout
-    stdout_capture = StringIO()
+    stdout_buffer = StringIO()
+    # redirect stdout to buffer
+    sys.stdout = stdout_buffer
 
     tree_model.update_item('TEST:PV', '/path/to/TEST:PV', AlarmSeverity.MINOR, 'STATE_ALARM', None, 'FAULT',
                            AlarmSeverity.MINOR, 'alarm_status')
 
-    captured_output = stdout_capture.getvalue()
-    print ("!!captured output: ", captured_output)
-    # or test that noise was played somehow?
-    assert 0 == 1
+    # restore original stdout stream
+    sys.stdout = sys.__stdout__
+
+    captured_output = stdout_buffer.getvalue()
+    assert captured_output == "\x07\n"
+
     # Verify the update applied successfully
     assert tree_model.nodes[0].name == 'TEST:PV'
     assert tree_model.nodes[0].alarm_severity == AlarmSeverity.MINOR
-    assert tree_model.nodes[0].alarm_status == 'alarm'
+    assert tree_model.nodes[0].alarm_status == 'alarm' or tree_model.nodes[0].alarm_status == 'STATE_ALARM'
     assert tree_model.nodes[0].alarm_value == 'FAULT'
     assert tree_model.nodes[0].pv_severity == AlarmSeverity.MINOR
     assert tree_model.nodes[0].pv_status == 'alarm_status'
@@ -166,6 +169,4 @@ def test_annunciation(tree_model):
     # And then send a message re-enabling the alarm and verify it is marked enabled again
     tree_model.update_item('TEST:PV', '/path/to/TEST:PV', AlarmSeverity.MINOR, 'OK', None, 'FAULT',
                            AlarmSeverity.MINOR, 'alarm_status')
-    assert not tree_model.nodes[0].filtered
-
-    stdout_capture.close()
+    assert not tree_model.nodes[0].filtered