1 files changed, 30 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/structured-clone/roundtrip.js b/js/src/jit-test/tests/structured-clone/roundtrip.js
new file mode 100644
index 0000000000..ef7732ea07
--- /dev/null
+++ b/js/src/jit-test/tests/structured-clone/roundtrip.js
@@ -0,0 +1,30 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+load(libdir + "asserts.js");
+
+const objects = [
+    {},
+    {a: 1, b: 2},
+    {0: 1, 1: 2},
+    {0: 1, 1: 2, a: 1},
+    {0: 1, 1: 2, a: 1, b: 2},
+    {1000000: 0, 1000001: 1},
+    {0: 0, 1: 0, 1000000: 0, 1000001: 1},
+
+    [],
+    [0, 1, 2],
+    [0, 15, 16],
+    [{a: 0, b: 0}, {b: 0, a: 0}],
+    [0, , , 1, 2],
+    [, 1],
+    [0,,],
+    [,,],
+]
+
+for (const obj of objects) {
+    assertDeepEq(deserialize(serialize(obj)), obj);
+    assertDeepEq(deserialize(serialize(wrapWithProto(obj, null))), obj);
+}