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-rw-r--r--js/src/tests/test262/language/arguments-object/cls-expr-private-meth-args-trailing-comma-multiple.js52
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diff --git a/js/src/tests/test262/language/arguments-object/cls-expr-private-meth-args-trailing-comma-multiple.js b/js/src/tests/test262/language/arguments-object/cls-expr-private-meth-args-trailing-comma-multiple.js
new file mode 100644
index 0000000000..75c3fd6008
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+++ b/js/src/tests/test262/language/arguments-object/cls-expr-private-meth-args-trailing-comma-multiple.js
@@ -0,0 +1,52 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/args-trailing-comma-multiple.case
+// - src/arguments/default/cls-expr-private-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (class expression private method)
+esid: sec-argument-lists-runtime-semantics-argumentlistevaluation
+features: [class, class-methods-private]
+flags: [generated]
+info: |
+ 9.4.4 Arguments Exotic Objects
+
+ Most ECMAScript functions make an arguments object available to their code. Depending upon the
+ characteristics of the function definition, its arguments object is either an ordinary object
+ or an arguments exotic object.
+
+
+ Trailing comma in the arguments list
+
+ Left-Hand-Side Expressions
+
+ Arguments :
+ ( )
+ ( ArgumentList )
+ ( ArgumentList , )
+
+ ArgumentList :
+ AssignmentExpression
+ ... AssignmentExpression
+ ArgumentList , AssignmentExpression
+ ArgumentList , ... AssignmentExpression
+---*/
+
+
+var callCount = 0;
+var C = class {
+ #method() {
+ assert.sameValue(arguments.length, 2);
+ assert.sameValue(arguments[0], 42);
+ assert.sameValue(arguments[1], 'TC39');
+ callCount = callCount + 1;
+ }
+
+ get method() {
+ return this.#method;
+ }
+};
+
+new C().method(42, 'TC39',);
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');
+
+reportCompare(0, 0);