1 files changed, 101 insertions, 0 deletions
diff --git a/js/src/tests/ecma_7/Destructuring/rest-parameter-arguments.js b/js/src/tests/ecma_7/Destructuring/rest-parameter-arguments.js
new file mode 100644
index 000000000..e87cdff33
--- /dev/null
+++ b/js/src/tests/ecma_7/Destructuring/rest-parameter-arguments.js
@@ -0,0 +1,101 @@
+/* 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/. */
+
+// Ensure the |arguments| object works as expected when a destructuring rest
+// parameter is present.
+
+// |arguments.length| with destructuring rest array.
+function argsLengthEmptyRestArray(...[]) {
+    return arguments.length;
+}
+assertEq(argsLengthEmptyRestArray(), 0);
+assertEq(argsLengthEmptyRestArray(10), 1);
+assertEq(argsLengthEmptyRestArray(10, 20), 2);
+
+function argsLengthRestArray(...[a]) {
+    return arguments.length;
+}
+assertEq(argsLengthRestArray(), 0);
+assertEq(argsLengthRestArray(10), 1);
+assertEq(argsLengthRestArray(10, 20), 2);
+
+function argsLengthRestArrayWithDefault(...[a = 0]) {
+    return arguments.length;
+}
+assertEq(argsLengthRestArrayWithDefault(), 0);
+assertEq(argsLengthRestArrayWithDefault(10), 1);
+assertEq(argsLengthRestArrayWithDefault(10, 20), 2);
+
+
+// |arguments.length| with destructuring rest object.
+function argsLengthEmptyRestObject(...{}) {
+    return arguments.length;
+}
+assertEq(argsLengthEmptyRestObject(), 0);
+assertEq(argsLengthEmptyRestObject(10), 1);
+assertEq(argsLengthEmptyRestObject(10, 20), 2);
+
+function argsLengthRestObject(...{a}) {
+    return arguments.length;
+}
+assertEq(argsLengthRestObject(), 0);
+assertEq(argsLengthRestObject(10), 1);
+assertEq(argsLengthRestObject(10, 20), 2);
+
+function argsLengthRestObjectWithDefault(...{a = 0}) {
+    return arguments.length;
+}
+assertEq(argsLengthRestObjectWithDefault(), 0);
+assertEq(argsLengthRestObjectWithDefault(10), 1);
+assertEq(argsLengthRestObjectWithDefault(10, 20), 2);
+
+
+// |arguments| access with destructuring rest array.
+function argsAccessEmptyRestArray(...[]) {
+    return arguments[0];
+}
+assertEq(argsAccessEmptyRestArray(), undefined);
+assertEq(argsAccessEmptyRestArray(10), 10);
+assertEq(argsAccessEmptyRestArray(10, 20), 10);
+
+function argsAccessRestArray(...[a]) {
+    return arguments[0];
+}
+assertEq(argsAccessRestArray(), undefined);
+assertEq(argsAccessRestArray(10), 10);
+assertEq(argsAccessRestArray(10, 20), 10);
+
+function argsAccessRestArrayWithDefault(...[a = 0]) {
+    return arguments[0];
+}
+assertEq(argsAccessRestArrayWithDefault(), undefined);
+assertEq(argsAccessRestArrayWithDefault(10), 10);
+assertEq(argsAccessRestArrayWithDefault(10, 20), 10);
+
+
+// |arguments| access with destructuring rest object.
+function argsAccessEmptyRestObject(...{}) {
+    return arguments[0];
+}
+assertEq(argsAccessEmptyRestObject(), undefined);
+assertEq(argsAccessEmptyRestObject(10), 10);
+assertEq(argsAccessEmptyRestObject(10, 20), 10);
+
+function argsAccessRestObject(...{a}) {
+    return arguments[0];
+}
+assertEq(argsAccessRestObject(), undefined);
+assertEq(argsAccessRestObject(10), 10);
+assertEq(argsAccessRestObject(10, 20), 10);
+
+function argsAccessRestObjectWithDefault(...{a = 0}) {
+    return arguments[0];
+}
+assertEq(argsAccessRestObjectWithDefault(), undefined);
+assertEq(argsAccessRestObjectWithDefault(10), 10);
+assertEq(argsAccessRestObjectWithDefault(10, 20), 10);
+
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);