Map-surfaces-2.js - mozsearch

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

load(libdir + "asserts.js");

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

    assertEq(typeof fn, "function");

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

var Map_size_getter = Object.getOwnPropertyDescriptor(Map.prototype, "size").get;

function test(obj) {

    testcase(obj, Map.prototype.get, "x");

    testcase(obj, Map.prototype.has, "x");

    testcase(obj, Map.prototype.set, "x", 1);

    testcase(obj, Map.prototype.delete, "x");

    testcase(obj, Map.prototype.clear);

    testcase(obj, Map.prototype.keys);

    testcase(obj, Map.prototype.values);

    testcase(obj, Map.prototype.entries);

    testcase(obj, Map_size_getter);

test(Map.prototype);

test(Object.create(new Map));

test(new Set());

test({});

test(null);

test(undefined);