Update test expectations

test/native_objc_test/typedef_test.dart

@@ -0,0 +1,36 @@
+// Copyright (c) 2023, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Objective C support is only available on mac.
+
+@TestOn('mac-os')
+
+import 'dart:ffi';
+import 'dart:io';
+
+import 'package:test/test.dart';
+import '../test_utils.dart';
+import 'typedef_bindings.dart';
+import 'util.dart';
+
+void main() {
+  late TypedefTestObjCLibrary lib;
+
+  group('typedef', () {
+    setUpAll(() {
+      logWarnings();
+      final dylib = File('test/native_objc_test/typedef_test.dylib');
+      verifySetupFile(dylib);
+      lib = TypedefTestObjCLibrary(DynamicLibrary.open(dylib.absolute.path));
+      generateBindingsForCoverage('typedef');
+    });
+
+    test('Regression test for #386', () {
+      // https://github.com/dart-lang/ffigen/issues/386
+      // Make sure that the typedef SomeClassPtr_dart is for SomeClass.
+      final SomeClassPtr_dart instance = SomeClass.new1(lib);
+      expect(instance.pointer, isNot(nullptr));
+    });
+  });
+}