Map-clear-iterators-1.js

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// A Map iterator does not visit entries removed by clear().

load(libdir + "iteration.js");

var m = new Map();

var it = m[Symbol.iterator]();

m.clear();

assertIteratorDone(it, undefined);

m = new Map([["a", 1], ["b", 2], ["c", 3], ["d", 4]]);

it = m[Symbol.iterator]();

assertIteratorNext(it, ["a", 1]);

m.clear();

assertIteratorDone(it, undefined);

var log = "";

m = new Map([["a", 1], ["b", 2], ["c", 3], ["d", 4]]);

for (var [k, v] of m) {

    log += k + v;

    if (k == "b")

        m.clear();

assertEq(log, "a1b2");