Test case for #9777

gistfile1.js

test("clone() attributes are independent (#9777)", function () {
	expect(1);

	var attrName = "quack",
		orig = jQuery( '<button>hi</button>' ).appendTo( "#qunit-fixture" ),
		clone1 = orig.clone().attr( attrName, "clone1" ).appendTo( "#qunit-fixture" ),
		clone2 = clone1.clone().attr( attrName, "clone2" ).appendTo( "#qunit-fixture" );
	equal( clone1.attr(attrName), "clone1", "First clone's attr is unmolested" );
});