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-rw-r--r--js/src/tests/test262/language/arguments-object/cls-decl-async-gen-func-args-trailing-comma-undefined.js48
1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/arguments-object/cls-decl-async-gen-func-args-trailing-comma-undefined.js b/js/src/tests/test262/language/arguments-object/cls-decl-async-gen-func-args-trailing-comma-undefined.js
new file mode 100644
index 0000000000..a2b5b4cc25
--- /dev/null
+++ b/js/src/tests/test262/language/arguments-object/cls-decl-async-gen-func-args-trailing-comma-undefined.js
@@ -0,0 +1,48 @@
+// |reftest| async
+// This file was procedurally generated from the following sources:
+// - src/arguments/args-trailing-comma-undefined.case
+// - src/arguments/default/async-gen-func-decl.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (async generator function declaration)
+esid: sec-asyncgenerator-definitions-instantiatefunctionobject
+features: [async-iteration]
+flags: [generated, async]
+info: |
+ AsyncGeneratorDeclaration : async [no LineTerminator here] function * BindingIdentifier
+ ( FormalParameters ) { AsyncGeneratorBody }
+
+ [...]
+ 3. Let F be ! AsyncGeneratorFunctionCreate(Normal, FormalParameters, AsyncGeneratorBody,
+ scope, strict).
+ [...]
+
+
+ Trailing comma in the arguments list
+
+ Left-Hand-Side Expressions
+
+ Arguments :
+ ( )
+ ( ArgumentList )
+ ( ArgumentList , )
+
+ ArgumentList :
+ AssignmentExpression
+ ... AssignmentExpression
+ ArgumentList , AssignmentExpression
+ ArgumentList , ... AssignmentExpression
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+async function* ref() {
+ assert.sameValue(arguments.length, 2);
+ assert.sameValue(arguments[0], 42);
+ assert.sameValue(arguments[1], undefined);
+ callCount = callCount + 1;
+}
+
+ref(42, undefined,).next().then(() => {
+ assert.sameValue(callCount, 1, 'generator function invoked exactly once');
+}).then($DONE, $DONE);