public TResult Execute <TResult>(Expression expression)
{
var dataConst = Expression.Constant(data);
if (expression is ConstantExpression constExp && constExp.Value is PointlessLinqQueryable <T> quer)
{
dataConst = Expression.Constant(quer.data);
}
if (expression is MethodCallExpression mcExp)
{
PointlessLinqQueryable <T> quer2 = new PointlessLinqQueryable <T>(data);
if (mcExp.Method == GetMethodInfo(Queryable.FirstOrDefault, quer2))
{
var call = Expression.Call(null, GetMethodInfo(Enumerable.FirstOrDefault, data), dataConst);
var lmb2 = Expression.Lambda <Func <TResult> >(call);
var fun2 = lmb2.Compile();
return(fun2());
}
}
var convert = Expression.Convert(dataConst, typeof(TResult));
var lmb = Expression.Lambda <Func <TResult> >(convert);
var fun = lmb.Compile();
return(fun());
}
public void CanQueryFirst()
{
var data = RandomData(100);
var query = new PointlessLinqQueryable <LdapUser>(data);
var result = query.FirstOrDefault();
result.Should().Be(data[0]);
}
public void CanQueryAList()
{
var data = RandomData(100);
var query = new PointlessLinqQueryable <LdapUser>(data);
var result = query.ToList();
result.Should().HaveCount(100);
}