1 files changed, 47 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/FinalizationRegistry/prototype-from-newtarget-custom.js b/js/src/tests/test262/built-ins/FinalizationRegistry/prototype-from-newtarget-custom.js
new file mode 100644
index 0000000000..b31b87972e
--- /dev/null
+++ b/js/src/tests/test262/built-ins/FinalizationRegistry/prototype-from-newtarget-custom.js
@@ -0,0 +1,47 @@
+// |reftest| skip-if(!this.hasOwnProperty('FinalizationRegistry')) -- FinalizationRegistry is not enabled unconditionally
+// Copyright (C) 2019 Leo Balter. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-finalization-registry-target
+description: >
+  The [[Prototype]] internal slot is computed from NewTarget.
+info: |
+  FinalizationRegistry ( cleanupCallback )
+
+  ...
+  3. Let finalizationRegistry be ? OrdinaryCreateFromConstructor(NewTarget,  "%FinalizationRegistryPrototype%", « [[Realm]], [[CleanupCallback]], [[Cells]], [[IsFinalizationRegistryCleanupJobActive]] »).
+  ...
+  9. Return finalizationRegistry.
+
+  OrdinaryCreateFromConstructor ( constructor, intrinsicDefaultProto [ , internalSlotsList ] )
+
+  ...
+  2. Let proto be ? GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
+  3. Return ObjectCreate(proto, internalSlotsList).
+
+  GetPrototypeFromConstructor ( constructor, intrinsicDefaultProto )
+
+  3. Let proto be ? Get(constructor, 'prototype').
+  4. If Type(proto) is not Object, then
+    a. Let realm be ? GetFunctionRealm(constructor).
+    b. Set proto to realm's intrinsic object named intrinsicDefaultProto.
+  5. Return proto.
+features: [FinalizationRegistry, Reflect.construct]
+---*/
+
+var finalizationRegistry;
+
+finalizationRegistry = Reflect.construct(FinalizationRegistry, [function() {}], Object);
+assert.sameValue(Object.getPrototypeOf(finalizationRegistry), Object.prototype, 'NewTarget is built-in Object constructor');
+
+var newTarget = function() {}.bind(null);
+Object.defineProperty(newTarget, 'prototype', {
+  get: function() {
+    return Array.prototype;
+  }
+});
+finalizationRegistry = Reflect.construct(FinalizationRegistry, [function() {}], newTarget);
+assert.sameValue(Object.getPrototypeOf(finalizationRegistry), Array.prototype, 'NewTarget is BoundFunction with accessor');
+
+reportCompare(0, 0);