1 files changed, 67 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/return-undefined-with-gc.js b/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/return-undefined-with-gc.js
new file mode 100644
index 0000000000..ef1f04b0e7
--- /dev/null
+++ b/js/src/tests/test262/built-ins/FinalizationRegistry/prototype/cleanupSome/return-undefined-with-gc.js
@@ -0,0 +1,67 @@
+// |reftest| skip-if(!this.hasOwnProperty('FinalizationRegistry')) async -- 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 undefined regardless the result of CleanupFinalizationRegistry
+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, arrow-function, async-functions, async-iteration, class, host-gc-required]
+includes: [async-gc.js]
+flags: [async, non-deterministic]
+---*/
+
+var called;
+var fn = function() {
+  called += 1;
+  return 39;
+};
+var cb = function() {
+  called += 1;
+  return 42;
+};
+var finalizationRegistry = new FinalizationRegistry(fn);
+
+function emptyCells() {
+  var target = {};
+  finalizationRegistry.register(target);
+
+  var prom = asyncGC(target);
+  target = null;
+
+  return prom;
+}
+
+emptyCells().then(function() {
+  called = 0;
+  assert.sameValue(finalizationRegistry.cleanupSome(cb), undefined, 'regular callback');
+  assert.sameValue(called, 1);
+}).then(emptyCells).then(function() {
+  called = 0;
+  assert.sameValue(finalizationRegistry.cleanupSome(fn), undefined, 'regular callback, same FG cleanup function');
+  assert.sameValue(called, 1);
+}).then(emptyCells).then(function() {
+  called = 0;
+  assert.sameValue(finalizationRegistry.cleanupSome(), undefined, 'undefined (implicit) callback, defer to FB callback');
+  assert.sameValue(called, 1);
+}).then(emptyCells).then(function() {
+  called = 0;
+  assert.sameValue(finalizationRegistry.cleanupSome(undefined), undefined, 'undefined (explicit) callback, defer to FB callback');
+  assert.sameValue(called, 1);
+}).then(emptyCells).then(function() {
+  assert.sameValue(finalizationRegistry.cleanupSome(() => 1), undefined, 'arrow function');
+}).then(emptyCells).then(function() {
+  assert.sameValue(finalizationRegistry.cleanupSome(async function() {}), undefined, 'async function');
+}).then(emptyCells).then(function() {
+  assert.sameValue(finalizationRegistry.cleanupSome(function *() {}), undefined, 'generator');
+}).then(emptyCells).then(function() {
+  assert.sameValue(finalizationRegistry.cleanupSome(async function *() {}), undefined, 'async generator');
+}).then($DONE, resolveAsyncGC);