Set-surfaces-2.js - mozsearch

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// Set methods throw when passed a this-value that isn't a Set.

load(libdir + "asserts.js");

function testcase(obj, fn, ...args) {

    assertEq(typeof fn, "function");

    assertThrowsInstanceOf(function () { fn.apply(obj, args); }, TypeError);

var Set_size_getter = Object.getOwnPropertyDescriptor(Set.prototype, "size").get;

function test(obj) {

    testcase(obj, Set.prototype.has, 12);

    testcase(obj, Set.prototype.add, 12);

    testcase(obj, Set.prototype.delete, 12);

    testcase(obj, Set.prototype.clear);

    testcase(obj, Set.prototype.keys);

    testcase(obj, Set.prototype.values);

    testcase(obj, Set.prototype.entries);

    testcase(obj, Set_size_getter);

test(Set.prototype);

test(Object.create(new Set));

test(new Map());

test({});

test(null);

test(undefined);