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-rw-r--r--js/src/tests/non262/RegExp/replace-local-tolength-lastindex.js22
1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/non262/RegExp/replace-local-tolength-lastindex.js b/js/src/tests/non262/RegExp/replace-local-tolength-lastindex.js
new file mode 100644
index 0000000000..7ba840e000
--- /dev/null
+++ b/js/src/tests/non262/RegExp/replace-local-tolength-lastindex.js
@@ -0,0 +1,22 @@
+// RegExp.prototype[@@replace] always executes ToLength(regExp.lastIndex) for
+// non-global RegExps.
+
+for (var flag of ["", "g", "y", "gy"]) {
+ var regExp = new RegExp("a", flag);
+
+ var called = false;
+ regExp.lastIndex = {
+ valueOf() {
+ assertEq(called, false);
+ called = true;
+ return 0;
+ }
+ };
+
+ assertEq(called, false);
+ regExp[Symbol.replace]("");
+ assertEq(called, !flag.includes("g"));
+}
+
+if (typeof reportCompare === "function")
+ reportCompare(true, true);