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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);
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