enumeration.js - mozsearch

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// |reftest| skip-if(!this.hasOwnProperty("Tuple"))

var tup = #[1, 2, 3];

var keys = Object.keys(tup);

assertEq(keys.length, 3);

assertEq(keys[0], "0");

assertEq(keys[1], "1");

assertEq(keys[2], "2");

var values = Object.values(tup);

assertEq(values.length, 3);

assertEq(values[0], 1);

assertEq(values[1], 2);

assertEq(values[2], 3);

var entries = Object.entries(tup);

assertEq(entries.length, 3);

assertEq(entries[0][0], "0");

assertEq(entries[0][1], 1);

assertEq(entries[1][0], "1");

assertEq(entries[1][1], 2);

assertEq(entries[2][0], "2");

assertEq(entries[2][1], 3);

var ownKeys = Reflect.ownKeys(Object(tup));

assertEq(ownKeys.length, 3);

assertEq(ownKeys[0], "0");

assertEq(ownKeys[1], "1");

assertEq(ownKeys[2], "2");

var spreadKeys = Object.keys({ ...tup });

assertEq(spreadKeys.length, 3);

assertEq(spreadKeys[0], "0");

assertEq(spreadKeys[1], "1");

assertEq(spreadKeys[2], "2");

var i = 0;

for (var key in tup) {

  switch (i++) {

	case 0: assertEq(key, "0"); break;

	case 1: assertEq(key, "1"); break;

	case 2: assertEq(key, "2"); break;

	default: assertUnreachable();

if (typeof reportCompare === "function") reportCompare(0, 0);