Set-iterator-remove-5.js

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// Removing a Set entry already visited by an iterator does not cause any

// entries to be skipped.

var str = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';

var set = new Set(str);

var log = '';

var i = 0;

for (var x of set) {

    log += x;

    if (i++ % 5 === 0) {

        // Delete all entries preceding this one.

        for (let y of set) {

            if (y === x)

                break;

            set.delete(y);

assertEq(log, str);

assertEq(set.size, 1);  // Elements 0 to 24 are removed, leaving only 25 (Z).

assertEq(set.has('Z'), true);