Set-iterator-add-2.js

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// A Set iterator does not iterate over new entries added after it throws StopIteration.

load(libdir + "iteration.js");

var set = new Set();

var iter0 = set[Symbol.iterator](), iter1 = set[Symbol.iterator]();

assertIteratorDone(iter0, undefined);  // closes iter0

set.add("x");

assertIteratorDone(iter0, undefined);  // already closed

assertIteratorNext(iter1, "x");  // was not yet closed