michael@0: // Check superficial features of Array.of.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: var desc = Object.getOwnPropertyDescriptor(Array, "of");
michael@0: assertEq(desc.configurable, true);
michael@0: assertEq(desc.enumerable, false);
michael@0: assertEq(desc.writable, true);
michael@0: assertEq(Array.of.length, 0);
michael@0: assertThrowsInstanceOf(() => new Array.of(), TypeError);  // not a constructor
michael@0: 
michael@0: // When the this-value passed in is not a constructor, the result is an array.
michael@0: for (let v of [undefined, null, false, "cow"])
michael@0:     assertEq(Array.isArray(Array.of.call(v)), true);