Add m-esr52 at 52.6.0

1 files changed, 27 insertions, 0 deletions

diff --git a/js/src/tests/ecma_7/extensions/parse-rest-destructuring-parameter.js b/js/src/tests/ecma_7/extensions/parse-rest-destructuring-parameter.js
new file mode 100644
index 000000000..dda67c95f
--- /dev/null
+++ b/js/src/tests/ecma_7/extensions/parse-rest-destructuring-parameter.js
@@ -0,0 +1,27 @@
+// |reftest| skip-if(!xulRuntime.shell)
+/* 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/. */
+
+function funArgs(params) {
+    return Reflect.parse(`function f(${params}) {}`).body[0].rest;
+}
+
+var arrayRest = funArgs("...[]");
+assertEq(arrayRest.type, "ArrayPattern");
+assertEq(arrayRest.elements.length, 0);
+
+arrayRest = funArgs("...[a]");
+assertEq(arrayRest.type, "ArrayPattern");
+assertEq(arrayRest.elements.length, 1);
+
+var objectRest = funArgs("...{}");
+assertEq(objectRest.type, "ObjectPattern");
+assertEq(objectRest.properties.length, 0);
+
+objectRest = funArgs("...{p: a}");
+assertEq(objectRest.type, "ObjectPattern");
+assertEq(objectRest.properties.length, 1);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);