fix for test ShaderGraphView

Author: iTris666

com.unity.sg2/Tests/GraphUI/TestEditorWindow.cs

@@ -10,7 +10,7 @@ protected override GraphView CreateGraphView()
         {
             GraphTool.Preferences.SetInitialItemLibrarySize(ItemLibraryService.Usage.CreateNode, new Vector2(425, 100), 2.0f);
 
-            var testGraphView = new TestGraphView(this, GraphTool, GraphTool.Name, m_PreviewUpdateDispatcher);
+            var testGraphView = TestGraphView.Create(this, GraphTool, GraphTool.Name, m_PreviewUpdateDispatcher);
             return testGraphView;
         }
 

com.unity.sg2/Tests/GraphUI/TestGraphView.cs

@@ -9,7 +9,7 @@ class TestGraphView : ShaderGraphView
         List<GraphElement> m_GraphElements = new();
 
         // Needed by GTF
-        public TestGraphView(
+        protected TestGraphView(
             GraphViewEditorWindow window,
             BaseGraphTool graphTool,
             string graphViewName,
@@ -19,7 +19,7 @@ public TestGraphView(
 
         }
 
-        public TestGraphView(
+        protected TestGraphView(
             GraphViewEditorWindow window,
             BaseGraphTool graphTool,
             string graphViewName,
@@ -30,6 +30,19 @@ public TestGraphView(
 
         }
 
+        public new static TestGraphView Create(
+            GraphViewEditorWindow window,
+            BaseGraphTool graphTool,
+            string graphViewName,
+            PreviewUpdateDispatcher previewUpdateDispatcher,
+            GraphViewDisplayMode displayMode = GraphViewDisplayMode.Interactive)
+        {
+            var graphView = new TestGraphView(window, graphTool, graphViewName, previewUpdateDispatcher, displayMode);
+            graphView.Initialize();
+
+            return graphView;
+        }
+
         public GraphElement GetGraphElement(GraphElementModel elementModel)
         {
             return m_GraphElements.FirstOrDefault(graphElement => ReferenceEquals(graphElement.GraphElementModel, elementModel));