1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Proxy/construct/trap-is-undefined.js b/js/src/tests/test262/built-ins/Proxy/construct/trap-is-undefined.js
new file mode 100644
index 0000000000..5682638564
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Proxy/construct/trap-is-undefined.js
@@ -0,0 +1,52 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget
+description: >
+    If the construct trap value is undefined, propagate the construct to the target object.
+info: |
+    [[Construct]] (argumentsList, newTarget)
+
+    ...
+    5. Let trap be ? GetMethod(handler, "construct").
+    6. If trap is undefined, then
+      a. Assert: target has a [[Construct]] internal method.
+      b. Return ? Construct(target, argumentsList, newTarget).
+    ...
+
+    GetMethod ( V, P )
+
+    ...
+    3. If func is either undefined or null, return undefined.
+    ...
+features: [Proxy, Reflect, Reflect.construct]
+---*/
+
+var calls = 0;
+var _NewTarget;
+
+var Target = new Proxy(function() {
+  throw new Test262Error('target should not be called');
+}, {
+  construct: function(_Target, args, NewTarget) {
+    calls += 1;
+    _NewTarget = NewTarget;
+    return {
+      sum: args[0] + args[1]
+    };
+  },
+});
+
+var P = new Proxy(Target, {
+  construct: undefined
+});
+
+var NewTarget = function() {};
+var obj = Reflect.construct(P, [3, 4], NewTarget);
+
+assert.sameValue(calls, 1, "construct is undefined: [[Construct]] is invoked once");
+assert.sameValue(_NewTarget, NewTarget, "construct is undefined: NewTarget is passed to [[Construct]]");
+assert.sameValue(obj.sum, 7, "construct is undefined: result of [[Construct]] is returned");
+
+reportCompare(0, 0);