public void TestRemoveDataElements()
{
HElement element1 = new HElement("div",
new HAttribute("data-value1", "value1"),
new HAttribute("data-value2", "value2"),
new HAttribute("data-value3", "value3")
);
HElement element2 = new HElement("div",
new HAttribute("data-value2", "value2"),
new HAttribute("data-value3", "value3"),
new HAttribute("data-value4", "value4")
);
var elements = new HElement[] { element1, null, element2 };
elements.RemoveData("value1", "value4");
Assert.Equal(new String[] { "data-value2", "data-value3", "data-value2", "data-value3" }, elements.Where(e => e != null).SelectMany(e => e.Attributes()).Select(a => a.Name).ToArray());
elements.RemoveData();
Assert.Equal(new String[] { }, elements.Where(e => e != null).SelectMany(e => e.Attributes()).Select(a => a.Name).ToArray());
elements = null;
elements.RemoveData();
}