transplant-finalization-registry-targets.js

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function testFinalizationRegistryAfterTransplant(global) {

  let cleanedUp = [];

  let registry = new FinalizationRegistry(value => cleanedUp.push(value));

  let {object, transplant} = transplantableObject();

  object.x = 42;

  registry.register(object, "held-value");

  transplant(global);

  transplant = undefined;

  global.object = object;

  object = undefined;

  gc();

  drainJobQueue();

  assertEq(cleanedUp.length, 0);

  global.object = undefined;

  gc();

  drainJobQueue();

  assertEq(cleanedUp.length, 1);

  assertEq(cleanedUp[0], "held-value");

gczeal(0);

testFinalizationRegistryAfterTransplant(this);

testFinalizationRegistryAfterTransplant(newGlobal({sameZoneAs: this}));

testFinalizationRegistryAfterTransplant(newGlobal({newCompartment: true}));