fixes before build 3

test/item_edit_sheet_test.dart

@@ -0,0 +1,57 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:groci/models/line_item.dart';
+import 'package:groci/widgets/item_edit_sheet.dart';
+
+void main() {
+  testWidgets('edit sheet syncs quantity unit and total', (tester) async {
+    LineItem? saved;
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Scaffold(
+          body: Builder(
+            builder: (context) {
+              return TextButton(
+                onPressed: () async {
+                  saved = await showItemEditSheet(
+                    context,
+                    item: LineItem(
+                      id: '1',
+                      name: 'Milk',
+                      price: 3.98,
+                      quantity: 2,
+                      unitPrice: 1.99,
+                    ),
+                  );
+                },
+                child: const Text('Open'),
+              );
+            },
+          ),
+        ),
+      ),
+    );
+
+    await tester.tap(find.text('Open'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Edit item'), findsOneWidget);
+    expect(find.text('Qty'), findsOneWidget);
+    expect(find.text('Unit price'), findsOneWidget);
+    expect(find.text('Total price'), findsOneWidget);
+    expect(find.text('2 × € 1.99'), findsOneWidget);
+
+    await tester.enterText(find.widgetWithText(TextField, 'Qty'), '3');
+    await tester.pump();
+    expect(find.text('3 × € 1.99'), findsOneWidget);
+
+    await tester.tap(find.text('Save'));
+    await tester.pumpAndSettle();
+
+    expect(saved, isNotNull);
+    expect(saved!.name, 'Milk');
+    expect(saved!.quantity, 3);
+    expect(saved!.unitPrice, 1.99);
+    expect(saved!.price, closeTo(5.97, 0.001));
+  });
+}