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

---
 .../proxy/testDirectProxyDefinePropertyFailure.js  | 26 ++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 js/src/jit-test/tests/proxy/testDirectProxyDefinePropertyFailure.js

(limited to 'js/src/jit-test/tests/proxy/testDirectProxyDefinePropertyFailure.js')

diff --git a/js/src/jit-test/tests/proxy/testDirectProxyDefinePropertyFailure.js b/js/src/jit-test/tests/proxy/testDirectProxyDefinePropertyFailure.js
new file mode 100644
index 000000000..0de3000c3
--- /dev/null
+++ b/js/src/jit-test/tests/proxy/testDirectProxyDefinePropertyFailure.js
@@ -0,0 +1,26 @@
+// Test handling of false return from a handler.defineProperty() hook.
+
+load(libdir + "asserts.js");
+
+var obj = {x: 1, y: 2};
+var nope = false;
+var p = new Proxy(obj, {
+    defineProperty(target, key, desc) { return nope; }
+});
+
+// Object.defineProperty throws on failure.
+print(1);
+assertThrowsInstanceOf(() => Object.defineProperty(p, "z", {value: 3}), TypeError);
+assertEq("z" in obj, false);
+assertThrowsInstanceOf(() => Object.defineProperty(p, "x", {value: 0}), TypeError);
+
+// Setting a property ultimately causes [[DefineOwnProperty]] to be called.
+// In strict mode code only, this is a TypeError.
+print(2);
+assertEq(p.z = 3, 3);
+assertThrowsInstanceOf(() => { "use strict"; p.z = 3; }, TypeError);
+
+// Other falsy values also trigger failure.
+print(3);
+for (nope of [0, -0, NaN, ""])
+    assertThrowsInstanceOf(() => { "use strict"; p.z = 3; }, TypeError);
-- 
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