1 files changed, 29 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/custom-this.js b/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/custom-this.js
new file mode 100644
index 0000000000..1b99dc1917
--- /dev/null
+++ b/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/custom-this.js
@@ -0,0 +1,29 @@
+// |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.prototype.cleanupSome
+description: Return values applying custom this
+info: |
+  FinalizationRegistry.prototype.cleanupSome ( [ callback ] )
+
+  1. Let finalizationRegistry be the this value.
+  2. If Type(finalizationRegistry) is not Object, throw a TypeError exception.
+  3. If finalizationRegistry does not have a [[Cells]] internal slot, throw a TypeError exception.
+  4. If callback is not undefined and IsCallable(callback) is false, throw a TypeError exception.
+  5. Perform ! CleanupFinalizationRegistry(finalizationRegistry, callback).
+  6. Return undefined.
+features: [FinalizationRegistry.prototype.cleanupSome, FinalizationRegistry]
+---*/
+
+var fn = function() {};
+var cleanupSome = FinalizationRegistry.prototype.cleanupSome;
+var finalizationRegistry = new FinalizationRegistry(fn);
+
+var cb = function() {};
+
+assert.sameValue(cleanupSome.call(finalizationRegistry, cb), undefined);
+assert.sameValue(cleanupSome.call(finalizationRegistry, fn), undefined), 'reuse the same cleanup callback fn';
+
+reportCompare(0, 0);