text: // 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-with-cleanup-some
  
  (function TestCleanupSomeWithoutFinalizationRegistry() {
    assertThrows(() => FinalizationRegistry.prototype.cleanupSome.call({}), TypeError);
    // Does not throw:
    let fg = new FinalizationRegistry(() => {});
    let rv = FinalizationRegistry.prototype.cleanupSome.call(fg);
    assertEquals(undefined, rv);
  })();
  
  (function TestCleanupSomeWithNonCallableCallback() {
    let fg = new FinalizationRegistry(() => {});
    assertThrows(() => fg.cleanupSome(1), TypeError);
    assertThrows(() => fg.cleanupSome(1n), TypeError);
    assertThrows(() => fg.cleanupSome(Symbol()), TypeError);
    assertThrows(() => fg.cleanupSome({}), TypeError);
    assertThrows(() => fg.cleanupSome('foo'), TypeError);
    assertThrows(() => fg.cleanupSome(true), TypeError);
    assertThrows(() => fg.cleanupSome(false), TypeError);
    assertThrows(() => fg.cleanupSome(null), TypeError);
  })();
  