Generate tests

test/language/arguments-object/cls-decl-gen-meth-static-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/cls-decl-gen-meth-static.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (class declaration generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  static *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], 'TC39');
+    callCount = callCount + 1;
+  }
+}
+
+C.method(42, 'TC39',).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-gen-meth-static-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/cls-decl-gen-meth-static.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (class declaration generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  static *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+}
+
+C.method(42, null,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-gen-meth-static-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/cls-decl-gen-meth-static.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (class declaration generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  static *method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+}
+
+C.method(42,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-gen-meth-static-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/cls-decl-gen-meth-static.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (class declaration generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  static *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+}
+
+C.method(42, undefined,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-gen-meth-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/cls-decl-gen-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (class declaration generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], 'TC39');
+    callCount = callCount + 1;
+  }
+}
+
+C.prototype.method(42, 'TC39',).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-gen-meth-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/cls-decl-gen-meth.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (class declaration generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+}
+
+C.prototype.method(42, null,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-gen-meth-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/cls-decl-gen-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (class declaration generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  *method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+}
+
+C.prototype.method(42,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-gen-meth-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/cls-decl-gen-meth.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (class declaration generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+}
+
+C.prototype.method(42, undefined,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-meth-static-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/cls-decl-meth-static.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (static class declaration method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  static method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], 'TC39');
+    callCount = callCount + 1;
+  }
+}
+
+C.method(42, 'TC39',);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-meth-static-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/cls-decl-meth-static.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (static class declaration method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  static method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+}
+
+C.method(42, null,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-meth-static-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/cls-decl-meth-static.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (static class declaration method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  static method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+}
+
+C.method(42,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-meth-static-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/cls-decl-meth-static.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (static class declaration method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  static method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+}
+
+C.method(42, undefined,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-meth-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/cls-decl-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (class declaration method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], 'TC39');
+    callCount = callCount + 1;
+  }
+}
+
+C.prototype.method(42, 'TC39',);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-meth-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/cls-decl-meth.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (class declaration method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+}
+
+C.prototype.method(42, null,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-meth-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/cls-decl-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (class declaration method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+}
+
+C.prototype.method(42,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-decl-meth-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/cls-decl-meth.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (class declaration method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+class C {
+  method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+}
+
+C.prototype.method(42, undefined,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-gen-meth-static-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/cls-expr-gen-meth-static.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (static class expression generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  static *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], 'TC39');
+    callCount = callCount + 1;
+  }
+};
+
+C.method(42, 'TC39',).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-gen-meth-static-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/cls-expr-gen-meth-static.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (static class expression generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  static *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+};
+
+C.method(42, null,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-gen-meth-static-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/cls-expr-gen-meth-static.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (static class expression generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  static *method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+};
+
+C.method(42,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-gen-meth-static-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/cls-expr-gen-meth-static.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (static class expression generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  static *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+};
+
+C.method(42, undefined,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-gen-meth-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/cls-expr-gen-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (class expression generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+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;
+  }
+};
+
+C.prototype.method(42, 'TC39',).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-gen-meth-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/cls-expr-gen-meth.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (class expression generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+};
+
+C.prototype.method(42, null,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-gen-meth-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/cls-expr-gen-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (class expression generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  *method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+};
+
+C.prototype.method(42,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-gen-meth-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/cls-expr-gen-meth.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (class expression generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+};
+
+C.prototype.method(42, undefined,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-meth-static-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/cls-expr-meth-static.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (static class expression method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  static method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], 'TC39');
+    callCount = callCount + 1;
+  }
+};
+
+C.method(42, 'TC39',);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-meth-static-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/cls-expr-meth-static.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (static class expression method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  static method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+};
+
+C.method(42, null,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-meth-static-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/cls-expr-meth-static.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (static class expression method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  static method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+};
+
+C.method(42,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-meth-static-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/cls-expr-meth-static.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (static class expression method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  static method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+};
+
+C.method(42, undefined,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-meth-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/cls-expr-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (class expression method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+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;
+  }
+};
+
+C.prototype.method(42, 'TC39',);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-meth-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/cls-expr-meth.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (class expression method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+};
+
+C.prototype.method(42, null,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-meth-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/cls-expr-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (class expression method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+};
+
+C.prototype.method(42,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/cls-expr-meth-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/cls-expr-meth.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (class expression method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var C = class {
+  method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+};
+
+C.prototype.method(42, undefined,);
+
+// Stores a reference `ref` for case evaluation
+var ref = C.prototype.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/func-decl-trailing-comma-multiple-args.js

@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/func-decl.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (function declaration)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+function ref() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], 'TC39');
+  callCount = callCount + 1;
+}
+
+ref(42, 'TC39',);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');

test/language/arguments-object/func-decl-trailing-comma-null.js

@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/func-decl.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (function declaration)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+function ref() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], null);
+  callCount = callCount + 1;
+}
+
+ref(42, null,);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');

test/language/arguments-object/func-decl-trailing-comma-single-args.js

@@ -0,0 +1,33 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/func-decl.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (function declaration)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+function ref() {
+  assert.sameValue(arguments.length, 1);
+  assert.sameValue(arguments[0], 42);
+  callCount = callCount + 1;
+}
+
+ref(42,);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');

test/language/arguments-object/func-decl-trailing-comma-undefined.js

@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/func-decl.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (function declaration)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+function ref() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], undefined);
+  callCount = callCount + 1;
+}
+
+ref(42, undefined,);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');

test/language/arguments-object/func-expr-trailing-comma-multiple-args.js

@@ -0,0 +1,35 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/func-expr.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (function expression)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], 'TC39');
+  callCount = callCount + 1;
+};
+
+ref(42, 'TC39',);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');

test/language/arguments-object/func-expr-trailing-comma-null.js

@@ -0,0 +1,35 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/func-expr.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (function expression)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], null);
+  callCount = callCount + 1;
+};
+
+ref(42, null,);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');

test/language/arguments-object/func-expr-trailing-comma-single-args.js

@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/func-expr.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (function expression)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function() {
+  assert.sameValue(arguments.length, 1);
+  assert.sameValue(arguments[0], 42);
+  callCount = callCount + 1;
+};
+
+ref(42,);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');

test/language/arguments-object/func-expr-trailing-comma-undefined.js

@@ -0,0 +1,35 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/func-expr.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (function expression)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], undefined);
+  callCount = callCount + 1;
+};
+
+ref(42, undefined,);
+
+assert.sameValue(callCount, 1, 'function invoked exactly once');

test/language/arguments-object/gen-func-decl-trailing-comma-multiple-args.js

@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/gen-func-decl.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (generator function declaration)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+function* ref() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], 'TC39');
+  callCount = callCount + 1;
+}
+
+ref(42, 'TC39',).next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');

test/language/arguments-object/gen-func-decl-trailing-comma-null.js

@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/gen-func-decl.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (generator function declaration)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+function* ref() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], null);
+  callCount = callCount + 1;
+}
+
+ref(42, null,).next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');

test/language/arguments-object/gen-func-decl-trailing-comma-single-args.js

@@ -0,0 +1,33 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/gen-func-decl.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (generator function declaration)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+function* ref() {
+  assert.sameValue(arguments.length, 1);
+  assert.sameValue(arguments[0], 42);
+  callCount = callCount + 1;
+}
+
+ref(42,).next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');

test/language/arguments-object/gen-func-decl-trailing-comma-undefined.js

@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/gen-func-decl.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (generator function declaration)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+function* ref() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], undefined);
+  callCount = callCount + 1;
+}
+
+ref(42, undefined,).next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');

test/language/arguments-object/gen-func-expr-trailing-comma-multiple-args.js

@@ -0,0 +1,35 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/gen-func-expr.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (generator function expression)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function*() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], 'TC39');
+  callCount = callCount + 1;
+};
+
+ref(42, 'TC39',).next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');

test/language/arguments-object/gen-func-expr-trailing-comma-null.js

@@ -0,0 +1,35 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/gen-func-expr.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (generator function expression)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function*() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], null);
+  callCount = callCount + 1;
+};
+
+ref(42, null,).next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');

test/language/arguments-object/gen-func-expr-trailing-comma-single-args.js

@@ -0,0 +1,34 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/gen-func-expr.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (generator function expression)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function*() {
+  assert.sameValue(arguments.length, 1);
+  assert.sameValue(arguments[0], 42);
+  callCount = callCount + 1;
+};
+
+ref(42,).next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');

test/language/arguments-object/gen-func-expr-trailing-comma-undefined.js

@@ -0,0 +1,35 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/gen-func-expr.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (generator function expression)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+// Stores a reference `ref` for case evaluation
+var ref;
+ref = function*() {
+  assert.sameValue(arguments.length, 2);
+  assert.sameValue(arguments[0], 42);
+  assert.sameValue(arguments[1], undefined);
+  callCount = callCount + 1;
+};
+
+ref(42, undefined,).next();
+
+assert.sameValue(callCount, 1, 'generator function invoked exactly once');

test/language/arguments-object/gen-meth-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/gen-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var obj = {
+  *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], 'TC39');
+    callCount = callCount + 1;
+  }
+};
+
+obj.method(42, 'TC39',).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = obj.method;
+
+assert.sameValue(callCount, 1, 'generator method invoked exactly once');

test/language/arguments-object/gen-meth-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/gen-meth.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var obj = {
+  *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+};
+
+obj.method(42, null,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = obj.method;
+
+assert.sameValue(callCount, 1, 'generator method invoked exactly once');

test/language/arguments-object/gen-meth-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/gen-meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var obj = {
+  *method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+};
+
+obj.method(42,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = obj.method;
+
+assert.sameValue(callCount, 1, 'generator method invoked exactly once');

test/language/arguments-object/gen-meth-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/gen-meth.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (generator method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var obj = {
+  *method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+};
+
+obj.method(42, undefined,).next();
+
+// Stores a reference `ref` for case evaluation
+var ref = obj.method;
+
+assert.sameValue(callCount, 1, 'generator method invoked exactly once');

test/language/arguments-object/meth-trailing-comma-multiple-args.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-multiple-args.case
+// - src/arguments/default/meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using multiple args (method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var obj = {
+  method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], 'TC39');
+    callCount = callCount + 1;
+  }
+};
+
+obj.method(42, 'TC39',);
+
+// Stores a reference `ref` for case evaluation
+var ref = obj.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/meth-trailing-comma-null.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-null.case
+// - src/arguments/default/meth.template
+/*---
+description: A trailing comma after null should not increase the arguments.length (method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var obj = {
+  method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], null);
+    callCount = callCount + 1;
+  }
+};
+
+obj.method(42, null,);
+
+// Stores a reference `ref` for case evaluation
+var ref = obj.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/meth-trailing-comma-single-args.js

@@ -0,0 +1,37 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-single-args.case
+// - src/arguments/default/meth.template
+/*---
+description: A trailing comma should not increase the arguments.length, using a single arg (method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var obj = {
+  method() {
+    assert.sameValue(arguments.length, 1);
+    assert.sameValue(arguments[0], 42);
+    callCount = callCount + 1;
+  }
+};
+
+obj.method(42,);
+
+// Stores a reference `ref` for case evaluation
+var ref = obj.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');

test/language/arguments-object/meth-trailing-comma-undefined.js

@@ -0,0 +1,38 @@
+// This file was procedurally generated from the following sources:
+// - src/arguments/trailing-comma-undefined.case
+// - src/arguments/default/meth.template
+/*---
+description: A trailing comma after undefined should not increase the arguments.length (method)
+esid: sec-arguments-exotic-objects
+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
+
+    12.3 Left-Hand-Side Expressions
+
+    Arguments[Yield, Await] : ( ArgumentList[?Yield, ?Await] , )
+---*/
+
+
+var callCount = 0;
+var obj = {
+  method() {
+    assert.sameValue(arguments.length, 2);
+    assert.sameValue(arguments[0], 42);
+    assert.sameValue(arguments[1], undefined);
+    callCount = callCount + 1;
+  }
+};
+
+obj.method(42, undefined,);
+
+// Stores a reference `ref` for case evaluation
+var ref = obj.method;
+
+assert.sameValue(callCount, 1, 'method invoked exactly once');