[test][assetwidget] Test loading of "empty" JSON

Empty as in minimal "{}"

Algorithm are a special case since without api version
an additional question is asked therefore the test
provides that in the JSON

beat/editor/test/test_assetwidget.py

@@ -481,7 +481,7 @@ class TestAssetWidget:
             qtbot, beat_context, asset_to_edit, asset_to_delete, messagebox_answer
         )
 
-    def test_load_empty_json(
+    def test_cancel_load_empty_json(
         self,
         qtbot,
         monkeypatch,
@@ -495,7 +495,9 @@ class TestAssetWidget:
         asset_widget.set_context(beat_context)
         asset_name = asset_type_prefix_entry_map[asset_type][0]
 
-        monkeypatch.setattr(QMessageBox, "critical", lambda *args: QMessageBox.Ok)
+        monkeypatch.setattr(
+            AssetWidget, "confirm_loading", lambda *args: QMessageBox.Cancel
+        )
 
         asset = Asset(test_prefix, asset_type, asset_name)
         with open(asset.declaration_path, "wt") as declaration_file:
@@ -504,6 +506,36 @@ class TestAssetWidget:
         with qtbot.assertNotEmitted(asset_widget.currentAssetChanged):
             asset_widget.loadAsset(asset)
 
+    def test_allow_load_invalid_json(
+        self,
+        qtbot,
+        monkeypatch,
+        test_prefix,
+        beat_context,
+        asset_type,
+        asset_type_prefix_entry_map,
+    ):
+        asset_widget = AssetWidget()
+        qtbot.addWidget(asset_widget)
+        asset_widget.set_context(beat_context)
+        asset_name = asset_type_prefix_entry_map[asset_type][0]
+
+        monkeypatch.setattr(
+            AssetWidget, "confirm_loading", lambda *args: QMessageBox.Ignore
+        )
+        monkeypatch.setattr(QMessageBox, "question", lambda *args: QMessageBox.Ok)
+
+        asset = Asset(test_prefix, asset_type, asset_name)
+        with open(asset.declaration_path, "wt") as declaration_file:
+            json_data = (
+                '{"api_version": 2}' if asset_type == AssetType.ALGORITHM else "{}"
+            )
+            declaration_file.write(json_data)
+
+        with qtbot.waitSignal(asset_widget.currentAssetChanged):
+            # import ipdb; ipdb.set_trace()
+            asset_widget.loadAsset(asset)
+
     def test_change_on_disk(
         self,
         qtbot,