Show / hide test results tile based on part

lib/widget/stock_detail.dart

@@ -53,14 +53,31 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
   final _editStockKey = GlobalKey<FormState>();
 
   _StockItemDisplayState(this.item) {
-    // TODO
   }
 
+  // StockItem object
   final InvenTreeStockItem item;
 
+  // Part object
+  InvenTreePart part;
+
+  @override
+  Future<void> onBuild(BuildContext context) async {
+
+    // Load part data if not already loaded
+    if (part == null) {
+      refresh();
+    }
+  }
+
   @override
   Future<void> request(BuildContext context) async {
     await item.reload(context);
+
+    // Request part information
+    part = await InvenTreePart().get(context, item.partId);
+
+    // Request test results...
     await item.getTestResults(context);
   }
 
@@ -417,6 +434,7 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
       );
     }
 
+    if ((item.testResultCount > 0) || (part != null && part.isTrackable)) {
       tiles.add(
           ListTile(
               title: Text(I18N.of(context).testResults),
@@ -425,15 +443,18 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
               onTap: () {
                 Navigator.push(
                     context,
-                MaterialPageRoute(builder: (context) => StockItemTestResultsWidget(item))
+                    MaterialPageRoute(
+                        builder: (context) => StockItemTestResultsWidget(item))
                 ).then((context) {
                   refresh();
                 });
               }
           )
       );
+    }
 
-    if (item.trackingItemCount > 0) {
+    // TODO - Re-enable stock item history display
+    if (false && item.trackingItemCount > 0) {
       tiles.add(
         ListTile(
           title: Text(I18N.of(context).history),