wildcard variable test for unused_result validation

We talked about migrating these tests to using language version overrides but I lost the plot over the weekend :).

Can you suggest how I'd modify this? How would I opt into this feature with a language version override if there is not version in which we have it enabled?


Change-Id: Ie0411d8f24e7468692a99cc2bc645bdbd3d5a500
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/369420
Auto-Submit: Phil Quitslund <[email protected]>
Commit-Queue: Brian Wilkerson <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: pq

pkg/analyzer/test/src/diagnostics/unused_result_test.dart

@@ -746,6 +746,39 @@ void main() {
 ''');
   }
 
+  test_method_result_assigned_wildcard_unused() async {
+    await assertNoErrorsInCode(r'''
+import 'package:meta/meta.dart';
+
+class A {
+  @useResult
+  int foo() => 0;
+}
+
+void main() {
+  var _ = A().foo();
+}
+''');
+  }
+
+  test_method_result_assigned_wildcard_unused_preWildcards() async {
+    await assertNoErrorsInCode(r'''
+// @dart = 3.4
+// (pre wildcard-variables)
+
+import 'package:meta/meta.dart';
+
+class A {
+  @useResult
+  int foo() => 0;
+}
+
+void main() {
+  var _ = A().foo();
+}
+''');
+  }
+
   test_method_result_binaryExpression() async {
     await assertNoErrorsInCode('''
 import 'package:meta/meta.dart';