public void GetById()
{
// Arrange
var searchSetId = 2;
_mock.Setup(s => s.Get(It.IsAny <int>())).Returns <int>(searchId =>
{
return(_sets.Where(tr => tr.Id == searchId).FirstOrDefault());
});
// Act
var result = _setService.Get(searchSetId);
// Assert
Assert.IsNotNull(result);
Assert.IsInstanceOfType(result, typeof(SetDTO));
Assert.IsTrue(result.Id > 0);
}