1 files changed, 35 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/FinalizationRegistry/length.js b/js/src/tests/test262/built-ins/FinalizationRegistry/length.js
new file mode 100644
index 0000000000..5ac6d2f0d8
--- /dev/null
+++ b/js/src/tests/test262/built-ins/FinalizationRegistry/length.js
@@ -0,0 +1,35 @@
+// |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: FinalizationRegistry.length property descriptor
+info: |
+  FinalizationRegistry ( cleanupCallback )
+
+  17 ECMAScript Standard Built-in Objects
+
+  Every built-in function object, including constructors, has a length
+  property whose value is an integer. Unless otherwise specified, this
+  value is equal to the largest number of named arguments shown in the
+  subclause headings for the function description. Optional parameters
+  (which are indicated with brackets: [ ]) or rest parameters (which
+  are shown using the form «...name») are not included in the default
+  argument count.
+
+  Unless otherwise specified, the length property of a built-in
+  function object has the attributes { [[Writable]]: false,
+  [[Enumerable]]: false, [[Configurable]]: true }.
+includes: [propertyHelper.js]
+features: [FinalizationRegistry]
+---*/
+
+verifyProperty(FinalizationRegistry, 'length', {
+  value: 1,
+  writable: false,
+  enumerable: false,
+  configurable: true
+});
+
+reportCompare(0, 0);