1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/Set/symbols.js b/js/src/jit-test/tests/Set/symbols.js
new file mode 100644
index 0000000000..f272102800
--- /dev/null
+++ b/js/src/jit-test/tests/Set/symbols.js
@@ -0,0 +1,26 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/ */
+
+load(libdir + "asserts.js");
+
+var s = new Set;
+
+// Symbols can be stored in Sets.
+var sym = Symbol();
+s.add(sym);
+assertEq(s.has(sym), true);
+assertEq(s.has(Symbol()), false);
+assertEq([...s][0], sym);
+s.add(sym);
+assertEq(s.has(sym), true);
+assertEq(s.size, 1);
+s.delete(sym);
+assertEq(s.has(sym), false);
+assertEq(s.size, 0);
+
+// Symbols returned by Symbol.for() can be in Sets.
+var str = "how much wood would a woodchuck chuck if a woodchuck could chuck wood";
+var s2  = "how much wood would a woodchuck chuck if could";
+var arr = str.split(" ").map(Symbol.for);
+s = new Set(arr);
+assertDeepEq([...s], s2.split(" ").map(Symbol.for));