1 files changed, 17 insertions, 0 deletions
diff --git a/js/src/tests/non262/Tuple/prototype/join/dda-separator.js b/js/src/tests/non262/Tuple/prototype/join/dda-separator.js
new file mode 100644
index 0000000000..cee96a708d
--- /dev/null
+++ b/js/src/tests/non262/Tuple/prototype/join/dda-separator.js
@@ -0,0 +1,17 @@
+// |reftest| skip-if(!this.hasOwnProperty("Tuple"))
+
+let dda = createIsHTMLDDA();
+
+assertEq(dda == null, true);
+assertEq(dda === null, false);
+
+assertEq(dda == undefined, true);
+assertEq(dda === undefined, false);
+
+let tup = Tuple("A", "B");
+assertEq(tup.join(null), "A,B");
+assertEq(tup.join(undefined), "A,B");
+assertEq(tup.join(dda), "A" + dda.toString() + "B");
+
+if (typeof reportCompare === "function")
+  reportCompare(0, 0);