summaryrefslogtreecommitdiffstats
path: root/js/src/tests/non262/expressions/trailing_comma_arguments.js
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /js/src/tests/non262/expressions/trailing_comma_arguments.js
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/tests/non262/expressions/trailing_comma_arguments.js')
-rw-r--r--js/src/tests/non262/expressions/trailing_comma_arguments.js85
1 files changed, 85 insertions, 0 deletions
diff --git a/js/src/tests/non262/expressions/trailing_comma_arguments.js b/js/src/tests/non262/expressions/trailing_comma_arguments.js
new file mode 100644
index 0000000000..612fd46a13
--- /dev/null
+++ b/js/src/tests/non262/expressions/trailing_comma_arguments.js
@@ -0,0 +1,85 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Trailing comma in Arguments production.
+
+// 12.3 Left-Hand-Side Expressions
+// Arguments[Yield]:
+// ()
+// ( ArgumentList[?Yield] )
+// ( ArgumentList[?Yield] , )
+
+
+function argsLength() {
+ return {value: arguments.length};
+}
+function sum(...rest) {
+ return {value: rest.reduce((a, c) => a + c, 0)};
+}
+
+function call(f, argList) {
+ return eval(`(${f}(${argList})).value`);
+}
+
+function newCall(F, argList) {
+ return eval(`(new ${F}(${argList})).value`);
+}
+
+function superCall(superClass, argList) {
+ return eval(`(new class extends ${superClass} {
+ constructor() {
+ super(${argList});
+ }
+ }).value`);
+}
+
+// Ensure the correct number of arguments is passed.
+for (let type of [call, newCall, superCall]) {
+ let test = type.bind(null, "argsLength");
+
+ assertEq(test("10, "), 1);
+ assertEq(test("10, 20, "), 2);
+ assertEq(test("10, 20, 30, "), 3);
+ assertEq(test("10, 20, 30, 40, "), 4);
+
+ assertEq(test("...[10, 20], "), 2);
+ assertEq(test("...[10, 20], 30, "), 3);
+ assertEq(test("...[10, 20], ...[30], "), 3);
+}
+
+// Ensure the arguments themselves are passed correctly.
+for (let type of [call, newCall, superCall]) {
+ let test = type.bind(null, "sum");
+
+ assertEq(test("10, "), 10);
+ assertEq(test("10, 20, "), 30);
+ assertEq(test("10, 20, 30, "), 60);
+ assertEq(test("10, 20, 30, 40, "), 100);
+
+ assertEq(test("...[10, 20], "), 30);
+ assertEq(test("...[10, 20], 30, "), 60);
+ assertEq(test("...[10, 20], ...[30], "), 60);
+}
+
+// Error cases.
+for (let type of [call, newCall, superCall]) {
+ let test = type.bind(null, "f");
+
+ // Trailing comma in empty arguments list.
+ assertThrowsInstanceOf(() => test(","), SyntaxError);
+
+ // Leading comma.
+ assertThrowsInstanceOf(() => test(", a"), SyntaxError);
+ assertThrowsInstanceOf(() => test(", ...a"), SyntaxError);
+
+ // Multiple trailing comma.
+ assertThrowsInstanceOf(() => test("a, , "), SyntaxError);
+ assertThrowsInstanceOf(() => test("...a, , "), SyntaxError);
+
+ // Elision.
+ assertThrowsInstanceOf(() => test("a, , b"), SyntaxError);
+}
+
+if (typeof reportCompare === "function")
+ reportCompare(0, 0);