[backend][assetmodel] Add json_path method to AssetModel

This method will return the full path to the json file for
a given asset name.

beat/editor/backend/assetmodel.py

@@ -247,3 +247,14 @@ class AssetModel(QStringListModel):
         """Returns the folder matching this model asset type"""
 
         return os.path.join(self.prefix_path, AssetType.path(self.asset_type))
+
+    def json_path(self, asset_name):
+        """Returns the full path to the json file matching the asset given
+
+        :param asset_name str: fully qualified asset name
+        """
+
+        asset_path = os.path.join(self.asset_folder, "{}.json".format(asset_name))
+        if not os.path.exists(asset_path):
+            raise RuntimeError("Invalid asset {}".format(asset_name))
+        return asset_path

beat/editor/test/test_models.py

@@ -34,21 +34,25 @@ def asset_type(request):
     return request.param
 
 
-class TestAssetModel:
-    """Test that the mock editor works correctly"""
+def create_model(qtbot, test_prefix, asset_type):
+    model = AssetModel()
 
-    def test_model_load(self, qtbot, test_prefix, asset_type):
-        model = AssetModel()
+    with qtbot.waitSignals(
+        [model.assetTypeChanged, model.prefixPathChanged]
+    ) as blocker:
+        model.asset_type = asset_type
+        model.prefix_path = test_prefix
+
+    assert blocker.all_signals_and_args[0].args[0] == asset_type
+    assert blocker.all_signals_and_args[1].args[0] == test_prefix
+    return model
 
-        with qtbot.waitSignals(
-            [model.assetTypeChanged, model.prefixPathChanged]
-        ) as blocker:
-            model.asset_type = asset_type
-            model.prefix_path = test_prefix
 
-        assert blocker.all_signals_and_args[0].args[0] == asset_type
-        assert blocker.all_signals_and_args[1].args[0] == test_prefix
+class TestAssetModel:
+    """Test that the mock editor works correctly"""
 
+    def test_model_load(self, qtbot, test_prefix, asset_type):
+        model = create_model(qtbot, test_prefix, asset_type)
         asset_list = model.stringList()
         assert len(asset_list) > 0
 
@@ -66,6 +70,24 @@ class TestAssetModel:
             for item in asset_list:
                 assert len(item.split("/")) == split_size
 
+    def test_json_path(self, qtbot, test_prefix, asset_type):
+        model = create_model(qtbot, test_prefix, asset_type)
+        asset_list = model.stringList()
+        assert len(asset_list) > 0
+
+        if asset_type == AssetType.DATAFORMAT:
+            basetypes = dataformat_basetypes()
+            asset_list = [item for item in asset_list if item not in basetypes]
+
+        for item in asset_list:
+            path = model.json_path(item)
+            assert path
+
+    def test_json_path_invalid_asset(self, qtbot, test_prefix, asset_type):
+        model = create_model(qtbot, test_prefix, asset_type)
+        with pytest.raises(RuntimeError):
+            model.json_path("invalid")
+
 
 class TestAssetType:
     """Test the asset type enum"""