49 lines
1.5 KiB
JavaScript
49 lines
1.5 KiB
JavaScript
// Map surfaces
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load(libdir + "iteration.js");
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var desc = Object.getOwnPropertyDescriptor(this, "Map");
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assertEq(desc.enumerable, false);
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assertEq(desc.configurable, true);
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assertEq(desc.writable, true);
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assertEq(typeof Map, 'function');
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assertEq(Object.keys(Map).length, 0);
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assertEq(Map.length, 0);
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assertEq(Map.name, "Map");
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assertEq(Object.getPrototypeOf(Map.prototype), Object.prototype);
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assertEq(Object.prototype.toString.call(Map.prototype), "[object Map]");
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assertEq(Object.prototype.toString.call(new Map()), "[object Map]");
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assertEq(Object.keys(Map.prototype).join(), "");
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assertEq(Map.prototype.constructor, Map);
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function checkMethod(name, arity) {
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var desc = Object.getOwnPropertyDescriptor(Map.prototype, name);
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assertEq(desc.enumerable, false);
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assertEq(desc.configurable, true);
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assertEq(desc.writable, true);
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assertEq(typeof desc.value, 'function');
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assertEq(desc.value.name, name);
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assertEq(desc.value.length, arity);
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}
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checkMethod("get", 1);
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checkMethod("has", 1);
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checkMethod("set", 2);
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checkMethod("delete", 1);
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checkMethod("keys", 0);
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checkMethod("values", 0);
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checkMethod("entries", 0);
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var desc = Object.getOwnPropertyDescriptor(Map.prototype, "size");
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assertEq(desc.enumerable, false);
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assertEq(desc.configurable, true);
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assertEq(typeof desc.get, 'function');
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assertEq(desc.get.length, 0);
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assertEq(desc.set, undefined);
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checkMethod("clear", 0);
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// Map.prototype[@@iterator] and .entries are the same function object.
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assertEq(Map.prototype[Symbol.iterator], Map.prototype.entries);
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