example addressing qgis/QGIS#55873

Signed-off-by: Benjamin Jakimow benjamin.jakimow@geo.hu-berlin.de <benjamin.jakimow@geo.hu-berlin.de>

scripts/QGIS_issues/qgis_issue_55873_updatefields.py

@@ -0,0 +1,47 @@
+from qgis.PyQt.QtCore import QVariant
+from qgis._core import QgsVectorLayer
+from qgis.core import QgsField, QgsEditorWidgetSetup, edit
+
+from qgis.gui import QgsGui
+from qgis.testing import start_app
+
+start_app()
+
+if len(QgsGui.editorWidgetRegistry().factories()) == 0:
+    QgsGui.editorWidgetRegistry().initEditors()
+
+# Example 1: change editor widget setup
+
+def onFieldsUpdated():
+    print('-- updatedFields emitted!')
+
+uri = "point?crs=epsg:4326&field=color:string"
+layer = QgsVectorLayer(uri, "Scratch point layer",  "memory")
+layer.updatedFields.connect(onFieldsUpdated)
+
+# Example 1: updatesFields is not emitted when changing the editorWidgetSetup
+with edit(layer):
+    # this emits the updatedFields signal
+    print('Add QgsField')
+    layer.addAttribute(QgsField('info', QVariant.String))
+
+# this does not emit the updatedFields signal
+print('Change QgsField editorWidgetSetup (no emit of updatedFields)')
+layer.setEditorWidgetSetup(0, QgsEditorWidgetSetup('Color', {}))
+
+# Example 2: editorWidgetSetup and comment not considered in field comparison
+field1 = QgsField('info', QVariant.String)
+field2 = QgsField('info', QVariant.String)
+assert field1 == field2
+assert field1.editorWidgetSetup().type() == field2.editorWidgetSetup().type()
+assert field1.comment() == field2.comment()
+
+# change comment and editorWidgetSetup
+field2.setEditorWidgetSetup(QgsEditorWidgetSetup('Color', {}))
+field2.setComment('Color info value')
+
+assert field1.editorWidgetSetup().type() != field2.editorWidgetSetup().type()
+assert field1.comment() != field2.comment()
+
+# different QgsEditorWidgetSetup types, but still same field?
+assert field1 != field2