[vector_graphics] Provide textDirection for semantics label to avoid crash without Directionality

Author: Bruce

packages/vector_graphics/CHANGELOG.md

@@ -1,6 +1,7 @@
 ## NEXT
 
 * Updates minimum supported SDK version to Flutter 3.38/Dart 3.10.
+* Fixes a crash when a `semanticsLabel` is provided without an ambient `Directionality` (flutter/flutter#175532).
 
 ## 1.2.2
 

packages/vector_graphics/lib/src/vector_graphics.dart

@@ -538,6 +538,7 @@ class _VectorGraphicWidgetState extends State<VectorGraphic> {
         container: widget.semanticsLabel != null,
         image: true,
         label: widget.semanticsLabel ?? '',
+        textDirection: Directionality.maybeOf(context) ?? TextDirection.ltr,
         child: child,
       );
     }

packages/vector_graphics/test/vector_graphics_test.dart

@@ -415,6 +415,23 @@ void main() {
     );
   });
 
+  testWidgets('Semantic label works without an ambient Directionality (flutter/flutter#175532)', (
+    WidgetTester tester,
+  ) async {
+    final testBundle = TestAssetBundle();
+
+    await tester.pumpWidget(
+      DefaultAssetBundle(
+        bundle: testBundle,
+        child: const VectorGraphic(loader: AssetBytesLoader('foo.svg'), semanticsLabel: 'Foo'),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(tester.takeException(), isNull);
+    expect(find.bySemanticsLabel('Foo'), findsOneWidget);
+  });
+
   testWidgets('Default placeholder builder', (WidgetTester tester) async {
     final testBundle = TestAssetBundle();