1 files changed, 103 insertions, 0 deletions
diff --git a/js/src/tests/non262/Proxy/trap-null.js b/js/src/tests/non262/Proxy/trap-null.js
new file mode 100644
index 0000000000..703649e7c8
--- /dev/null
+++ b/js/src/tests/non262/Proxy/trap-null.js
@@ -0,0 +1,103 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+var gTestfile = 'trap-null.js';
+var BUGNUMBER = 1257102;
+var summary = "null as a trap value on a handler should operate on the target";
+
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+// This might seem like overkill, but this proxying trick caught typos of
+// several trap names before this test landed.  \o/  /o\
+var allTraps = {
+  getPrototypeOf: null,
+  setPrototypeOf: null,
+  isExtensible: null,
+  preventExtensions: null,
+  getOwnPropertyDescriptor: null,
+  defineProperty: null,
+  has: null,
+  get: null,
+  set: null,
+  deleteProperty: null,
+  ownKeys: null,
+  apply: null,
+  construct: null,
+};
+
+var complainingHandler = new Proxy(allTraps, {
+  get(target, p, receiver) {
+    var v = Reflect.get(target, p, receiver);
+    if (v !== null)
+      throw new TypeError("failed to set one of the traps to null?  " + p);
+
+    return v;
+  }
+});
+
+var proxyTarget = function(x) {
+  "use strict";
+  var str = this + x;
+  str += new.target ? "constructing" : "calling";
+  return new.target ? new String(str) : str;
+};
+proxyTarget.prototype.toString = () => "###";
+proxyTarget.prototype.valueOf = () => "@@@";
+
+var proxy = new Proxy(proxyTarget, complainingHandler);
+
+assertEq(Reflect.getPrototypeOf(proxy), Function.prototype);
+
+assertEq(Object.getPrototypeOf(proxyTarget), Function.prototype);
+assertEq(Reflect.setPrototypeOf(proxy, null), true);
+assertEq(Object.getPrototypeOf(proxyTarget), null);
+
+assertEq(Reflect.isExtensible(proxy), true);
+
+assertEq(Reflect.isExtensible(proxyTarget), true);
+assertEq(Reflect.preventExtensions(proxy), true);
+assertEq(Reflect.isExtensible(proxy), false);
+assertEq(Reflect.isExtensible(proxyTarget), false);
+
+var desc = Reflect.getOwnPropertyDescriptor(proxy, "length");
+assertEq(desc.value, 1);
+
+assertEq(desc.configurable, true);
+assertEq(Reflect.defineProperty(proxy, "length", { value: 3, configurable: false }), true);
+desc = Reflect.getOwnPropertyDescriptor(proxy, "length");
+assertEq(desc.configurable, false);
+
+assertEq(Reflect.has(proxy, "length"), true);
+
+assertEq(Reflect.get(proxy, "length"), 3);
+
+assertEq(Reflect.set(proxy, "length", 3), false);
+
+assertEq(Reflect.deleteProperty(proxy, "length"), false);
+
+var keys = Reflect.ownKeys(proxy);
+assertEq(keys.length, 3);
+keys.sort();
+assertEq(keys[0], "length");
+assertEq(keys[1], "name");
+assertEq(keys[2], "prototype");
+
+assertEq(Reflect.apply(proxy, "hi!", [" "]), "hi! calling");
+
+var res = Reflect.construct(proxy, [" - "]);
+assertEq(typeof res, "object");
+assertEq(res instanceof String, true);
+assertEq(res.valueOf(), "@@@ - constructing");
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("Tests complete");