public void SortByClauseListOptionsAddTest()
{
var options = new ListOptions()
{
Sort = "code-"
};
options.AddSort((SortByClause)"total-");
Assert.Equal("code-,total-", options.Sort);
options.AddSort((SortByClause)"date");
Assert.Equal("code-,total-,date+", options.Sort);
options.RemoveSort((SortByClause)"total-");
Assert.Equal("code-,date+", options.Sort);
options.AddSort((SortByClause)"date-");
Assert.Equal("code-,date-", options.Sort);
}
