1 files changed, 49 insertions, 0 deletions
diff --git a/deps/v8/test/mjsunit/harmony/weakrefs/clear-clears-factory-pointer.js b/deps/v8/test/mjsunit/harmony/weakrefs/clear-clears-factory-pointer.js
new file mode 100644
index 0000000000..98410d5d0e
--- /dev/null
+++ b/deps/v8/test/mjsunit/harmony/weakrefs/clear-clears-factory-pointer.js
@@ -0,0 +1,49 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-weak-refs --expose-gc --noincremental-marking
+
+// Test that WeakCell.prototype.clear() also clears the WeakFactory pointer of
+// WeakCell. The only way to observe this is to assert that the WeakCell no
+// longer keeps its WeakFactory alive after clear() has been called.
+
+let weak_cell;
+let weak_cell_pointing_to_factory;
+
+let cleanup1_call_count = 0;
+let cleanup2_call_count = 0;
+
+let cleanup1 = function() {
+  ++cleanup1_call_count;
+}
+
+let cleanup2 = function() {
+  ++cleanup2_call_count;
+}
+
+let wf1 = new WeakFactory(cleanup1);
+
+(function(){
+  let wf2 = new WeakFactory(cleanup2);
+
+  (function() {
+    let object = {};
+    weak_cell = wf2.makeCell(object);
+    // object goes out of scope.
+  })();
+
+  weak_cell_pointing_to_factory = wf1.makeCell(wf2);
+  // wf goes out of scope
+})();
+
+weak_cell.clear();
+gc();
+
+// Assert that weak_cell_pointing_to_factory now got cleared.
+let timeout_func = function() {
+  assertEquals(1, cleanup1_call_count);
+  assertEquals(0, cleanup2_call_count);
+}
+
+setTimeout(timeout_func, 0);