1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/regexp/atom-match-unicode-split-surrogate.js b/js/src/jit-test/tests/regexp/atom-match-unicode-split-surrogate.js
new file mode 100644
index 0000000000..3c1909fcf2
--- /dev/null
+++ b/js/src/jit-test/tests/regexp/atom-match-unicode-split-surrogate.js
@@ -0,0 +1,25 @@
+function test(flags) {
+  // RegExp with a simple atom matcher.
+  // - Global flag to enable setting 'lastIndex'.
+  let s = "\u{10000}";
+  let re = RegExp(s, flags + "g");
+
+  for (let i = 0; i < 200; ++i) {
+    // Set lastIndex in the middle of the surrogate pair.
+    re.lastIndex = 1;
+
+    // |exec| will reset lastIndex to the start of the surrogate pair.
+    let r = re.exec(s);
+
+    // Atom match should succeed.
+    assertEq(r[0], s);
+    assertEq(r.index, 0);
+    assertEq(re.lastIndex, 2);
+  }
+}
+
+// Unicode flag to enable surrogate pairs support.
+test("u");
+
+// Unicode-Sets flag to enable surrogate pairs support.
+test("v");