public void When_Creating_With_No_Extensions_Then_Add_Extensions()
{
_business = new ServerBusiness(GroupsSaveFile, ClientsSaveFile);
Tuple <string, string> files = _business.GetSaveFilesNames();
Assert.AreEqual(Path.GetExtension(files.Item1), ".xml");
Assert.AreEqual(Path.GetExtension(files.Item2), ".xml");
}