1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/non262/Symbol/valueOf.js b/js/src/tests/non262/Symbol/valueOf.js
new file mode 100644
index 0000000000..a3823c3ffd
--- /dev/null
+++ b/js/src/tests/non262/Symbol/valueOf.js
@@ -0,0 +1,22 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+var symbols = [
+    Symbol(),
+    Symbol("ok"),
+    Symbol.for("dummies"),
+    Symbol.iterator
+];
+
+for (var sym of symbols) {
+    assertEq(sym.valueOf(), sym);
+    assertEq(Object(sym).valueOf(), sym);
+}
+
+// Any other value throws.
+var nonsymbols = [undefined, null, NaN, {}, Symbol.prototype];
+for (var nonsym of nonsymbols)
+    assertThrowsInstanceOf(() => Symbol.prototype.valueOf.call(nonsym), TypeError);
+
+if (typeof reportCompare === "function")
+    reportCompare(0, 0);