Tests for link attributes

Support for Subresource Integrity requires providing integrity and crossorigin attributes to the link Element.

By supplying an Object of attribue name/attribute value pairs as the fourth argument to loadCSS(), attributes can be set on the stylesheet's DOM Element.

loadCSS( 
	"https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css",
	null,
	null,
	{
		"title": "Bootstrap Styles",
		"type": "text/css",
		"crossorigin": "anonymous",
		"integrity": "sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm"
		// etc.
	}
);
		

The following tests aim to validate the behavior of the API using correct and incorrect configurations: