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// Multiple live iterators on the same Map can cope with removing entries.
load(libdir + "iteration.js");
// Make a map.
var map = new Map();
var SIZE = 7;
for (var j = 0; j < SIZE; j++)
map.set(j, j);
// Make lots of iterators pointing to entry 2 of the map.
var NITERS = 5;
var iters = [];
for (var i = 0; i < NITERS; i++) {
var iter = map[Symbol.iterator]();
assertIteratorNext(iter, [0, 0]);
assertIteratorNext(iter, [1, 1]);
iters[i] = iter;
}
// Remove half of the map entries.
for (var j = 0; j < SIZE; j += 2)
map.delete(j);
// Make sure all the iterators still work.
for (var i = 0; i < NITERS; i++) {
var iter = iters[i];
for (var j = 3; j < SIZE; j += 2)
assertIteratorNext(iter, [j, j]);
assertIteratorDone(iter, undefined);
}
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