1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/collections/Set-constructor-3.js b/js/src/jit-test/tests/collections/Set-constructor-3.js
new file mode 100644
index 0000000000..07bcd1a1dd
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Set-constructor-3.js
@@ -0,0 +1,12 @@
+// The argument to Set may contain a value multiple times. Duplicates are discarded.
+
+var s = new Set(["testing", "testing", 123]);
+assertEq(s.size, 2);
+
+var values = [undefined, null, false, NaN, 0, -0, 6.022e23, -Infinity, "", "xyzzy", {}, Math.sin];
+for (let v of values) {
+    var a = [v, {}, {}, {}, v, {}, v, v];
+    s = new Set(a);
+    assertEq(s.size, 5);
+    assertEq(s.has(v), true);
+}