1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/basic/tagTempl.js b/js/src/jit-test/tests/basic/tagTempl.js
new file mode 100644
index 0000000000..f4007a8c9a
--- /dev/null
+++ b/js/src/jit-test/tests/basic/tagTempl.js
@@ -0,0 +1,35 @@
+/*
+ * Tests tagged template string functionality.
+ */
+
+function check(actual, expected) {
+    assertEq(actual.length, expected.length);
+    for (var i = 0; i < expected.length; i++)
+       assertEq(actual[i], expected[i]);
+}
+
+function func(a) { return a; }
+
+function csoLoop() {
+    var cso = [];
+    for (var index = 0; index < 2000; index++) {
+        cso[index] = func`hey${4}there`;
+        if (index > 0)
+            assertEq(cso[index - 1], cso[index]);
+    }
+}
+
+// Tests baseline and ion functionality.
+csoLoop();
+
+// Tests off thread compilation
+if (helperThreadCount() !== 0) {
+    offThreadCompileToStencil("(x=>x)`abc`");
+    var stencil = finishOffThreadStencil();
+    a = evalStencil(stencil);
+    check(a, ["abc"]);
+    check(a.raw, ["abc"]);
+    assertEq(a === a.raw, false);
+    assertEq(Object.isFrozen(a), true);
+    assertEq(Object.isFrozen(a.raw), true);
+}