public void Split()
{
var input = new StringValue("a.b.c");
var arguments = new FilterArguments().Add(new StringValue("."));
var context = new TemplateContext();
var result = StringFilters.Split(input, arguments, context);
Assert.Equal(3, result.Enumerate().Count());
Assert.Equal(new StringValue("a"), result.Enumerate().ElementAt(0));
Assert.Equal(new StringValue("b"), result.Enumerate().ElementAt(1));
Assert.Equal(new StringValue("c"), result.Enumerate().ElementAt(2));
}