1 files changed, 56 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/arguments-object/cls-decl-async-private-gen-meth-static-args-trailing-comma-undefined.js b/js/src/tests/test262/language/arguments-object/cls-decl-async-private-gen-meth-static-args-trailing-comma-undefined.js
new file mode 100644
index 0000000000..c3bac83420
--- /dev/null
+++ b/js/src/tests/test262/language/arguments-object/cls-decl-async-private-gen-meth-static-args-trailing-comma-undefined.js
@@ -0,0 +1,56 @@
+// |reftest| async
+// This file was procedurally generated from the following sources:
+// - src/arguments/args-trailing-comma-undefined.case
+// - src/arguments/default/cls-decl-async-private-gen-meth-static.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (static class expression private generator method)
+esid: sec-argument-lists-runtime-semantics-argumentlistevaluation
+features: [async-iteration, class, class-static-methods-private]
+flags: [generated, async]
+info: |
+    Arguments :
+      ( )
+      ( ArgumentList )
+      ( ArgumentList , )
+
+    ArgumentList :
+      AssignmentExpression
+      ... AssignmentExpression
+      ArgumentList , AssignmentExpression
+      ArgumentList , ... AssignmentExpression
+
+
+    Trailing comma in the arguments list
+
+    Left-Hand-Side Expressions
+
+    Arguments :
+        ( )
+        ( ArgumentList )
+        ( ArgumentList , )
+
+    ArgumentList :
+        AssignmentExpression
+        ... AssignmentExpression
+        ArgumentList , AssignmentExpression
+        ArgumentList , ... AssignmentExpression
+---*/
+
+
+var callCount = 0;
+class C {
+  static async * #method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+
+  static get method() {
+      return this.#method;
+  }
+}
+
+C.method(42, undefined,).next().then(() => {
+    assert.sameValue(callCount, 1, 'method invoked exactly once');
+}).then($DONE, $DONE);