MapSet-prototype-add-set-fuses.js

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// Mutating Map.prototype.set pops the fuse. A no-op change is fine.

assertEq(getFuseState().OptimizeMapPrototypeSetFuse.intact, true);

let v1 = Map.prototype.set;

Map.prototype.set = v1;

assertEq(getFuseState().OptimizeMapPrototypeSetFuse.intact, true);

Map.prototype.set = function() {};

assertEq(getFuseState().OptimizeMapPrototypeSetFuse.intact, false);

// Same for Set.prototype.add.

assertEq(getFuseState().OptimizeSetPrototypeAddFuse.intact, true);

let v2 = Set.prototype.add;

Set.prototype.add = v2;

assertEq(getFuseState().OptimizeSetPrototypeAddFuse.intact, true);

delete Set.prototype.add;

assertEq(getFuseState().OptimizeSetPrototypeAddFuse.intact, false);

// Same for WeakMap.prototype.set.

assertEq(getFuseState().OptimizeWeakMapPrototypeSetFuse.intact, true);

let v3 = WeakMap.prototype.set;

WeakMap.prototype.set = v3;

assertEq(getFuseState().OptimizeWeakMapPrototypeSetFuse.intact, true);

WeakMap.prototype.set = function() {};

assertEq(getFuseState().OptimizeWeakMapPrototypeSetFuse.intact, false);

// Same for WeakSet.prototype.add.

assertEq(getFuseState().OptimizeWeakSetPrototypeAddFuse.intact, true);

let v4 = WeakSet.prototype.add;

WeakSet.prototype.add = v4;

assertEq(getFuseState().OptimizeWeakSetPrototypeAddFuse.intact, true);

delete WeakSet.prototype.add;

assertEq(getFuseState().OptimizeWeakSetPrototypeAddFuse.intact, false);