From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 .../tests/collections/Array-of-length-setter.js    | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 js/src/jit-test/tests/collections/Array-of-length-setter.js

(limited to 'js/src/jit-test/tests/collections/Array-of-length-setter.js')

diff --git a/js/src/jit-test/tests/collections/Array-of-length-setter.js b/js/src/jit-test/tests/collections/Array-of-length-setter.js
new file mode 100644
index 000000000..e3d97f412
--- /dev/null
+++ b/js/src/jit-test/tests/collections/Array-of-length-setter.js
@@ -0,0 +1,26 @@
+// Array.of calls a "length" setter if one is present.
+
+var hits = 0;
+var lastObj = null, lastVal = undefined;
+function setter(v) {
+    hits++;
+    lastObj = this;
+    lastVal = v;
+}
+
+// when the setter is on the new object
+function Pack() {
+    Object.defineProperty(this, "length", {set: setter});
+}
+Pack.of = Array.of;
+var pack = Pack.of("wolves", "cards", "cigarettes", "lies");
+assertEq(lastObj, pack);
+assertEq(lastVal, 4);
+
+// when the setter is on the new object's prototype
+function Bevy() {}
+Object.defineProperty(Bevy.prototype, "length", {set: setter});
+Bevy.of = Array.of;
+var bevy = Bevy.of("quail");
+assertEq(lastObj, bevy);
+assertEq(lastVal, 1);
-- 
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