Show genre change using show_model_changes

beets/ui/__init__.py

@@ -1078,7 +1078,9 @@ def _field_diff(field, old, old_fmt, new, new_fmt):
     return f"{oldstr} -> {newstr}"
 
 
-def show_model_changes(new, old=None, fields=None, always=False):
+def show_model_changes(
+    new, old=None, fields=None, always=False, print_obj: bool = True
+):
     """Given a Model object, print a list of changes from its pristine
     version stored in the database. Return a boolean indicating whether
     any changes were found.
@@ -1117,7 +1119,7 @@ def show_model_changes(new, old=None, fields=None, always=False):
         )
 
     # Print changes.
-    if changes or always:
+    if print_obj and (changes or always):
         print_(format(old))
     if changes:
         print_("\n".join(changes))

beetsplug/lastgenre/__init__.py

@@ -468,7 +468,9 @@ class LastGenrePlugin(plugins.BeetsPlugin):
         """Fetch genre and log it."""
         self._log.info(str(obj))
         obj.genre, label = self._get_genre(obj)
-        self._log.info("Resolved ({}): {}", label, obj.genre)
+        self._log.debug("Resolved ({}): {}", label, obj.genre)
+
+        ui.show_model_changes(obj, fields=["genre"], print_obj=False)
 
     @singledispatchmethod
     def _process(self, obj: LibModel, write: bool) -> None:

test/plugins/test_lastgenre.py

@@ -152,13 +152,10 @@ class LastGenrePluginTest(PluginTestCase):
             raise AssertionError("Unexpected store call")
 
         # Verify that try_write was never called (file operations skipped)
-        with (
-            patch("beetsplug.lastgenre.Item.store", unexpected_store),
-            self.assertLogs() as logs,
-        ):
-            self.run_command("lastgenre", "--pretend")
+        with patch("beetsplug.lastgenre.Item.store", unexpected_store):
+            output = self.run_with_output("lastgenre", "--pretend")
 
-        assert "Mock Genre" in str(logs.output)
+        assert "Mock Genre" in output
         album.load()
         assert album.genre == "Original Genre"
         assert album.items()[0].genre == "Original Genre"