Map-surfaces-1.js - mozsearch

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// Map surfaces

load(libdir + "iteration.js");

var desc = Object.getOwnPropertyDescriptor(this, "Map");

assertEq(desc.enumerable, false);

assertEq(desc.configurable, true);

assertEq(desc.writable, true);

assertEq(typeof Map, 'function');

assertEq(Object.keys(Map).length, 0);

assertEq(Map.length, 0);

assertEq(Map.name, "Map");

assertEq(Object.getPrototypeOf(Map.prototype), Object.prototype);

assertEq(Object.prototype.toString.call(Map.prototype), "[object Map]");

assertEq(Object.prototype.toString.call(new Map()), "[object Map]");

assertEq(Object.keys(Map.prototype).join(), "");

assertEq(Map.prototype.constructor, Map);

function checkMethod(name, arity) {

    var desc = Object.getOwnPropertyDescriptor(Map.prototype, name);

    assertEq(desc.enumerable, false);

    assertEq(desc.configurable, true);

    assertEq(desc.writable, true);

    assertEq(typeof desc.value, 'function');

    assertEq(desc.value.name, name);

    assertEq(desc.value.length, arity);

checkMethod("get", 1);

checkMethod("has", 1);

checkMethod("set", 2);

checkMethod("delete", 1);

checkMethod("keys", 0);

checkMethod("values", 0);

checkMethod("entries", 0);

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

assertEq(desc.enumerable, false);

assertEq(desc.configurable, true);

assertEq(typeof desc.get, 'function');

assertEq(desc.get.length, 0);

assertEq(desc.set, undefined);

checkMethod("clear", 0);

// Map.prototype[@@iterator] and .entries are the same function object.

assertEq(Map.prototype[Symbol.iterator], Map.prototype.entries);