public void Should_Use_Value_Placeholder_Expression_On_ComposeExpression()
{
var calculated = Placeholder.Create(() => 5);
Expression <Func <int> > expr = () => 3 + calculated.Value;
expr.ComposeExpression().Compile().Invoke().ShouldBe(8);
}
public void Should_Use_Func_Placeholder_Expression_On_ComposeExpression()
{
var add = Placeholder.Create((int x) => x + 1);
Expression <Func <int> > expr = () => add.Invoke(1);
expr.ComposeExpression().Compile().Invoke().ShouldBe(2);
}
public void Should_Throw_On_Func_Placeholder_Invocation()
{
var filter =
Placeholder.Create <IQueryable <int>, IQueryable <int> >(x => x.Where(i => i > 2).Where(i => i < 5));
var l = new List <int>
{
1,
2,
3,
4,
5,
6
};
Should.Throw <NotImplementedException>(() =>
l.AsQueryable().SelectMany(i => filter.Invoke(l.AsQueryable()).Select(j => new { i, j })).ToList());
}
public void Should_Use_Value_Placeholder_Expression_On_ComposeQuery()
{
var range =
Placeholder.Create(() => Enumerable.Range(1, 3));
var l = new List <int>
{
1,
2,
3,
4,
5,
6
};
var res = l.AsQueryable().SelectMany(i => range.Value.Select(j => new { i, j }))
.ComposeQuery().ToList();
res.Count.ShouldBe(l.Count * 3);
}
public void Should_Use_Func_Placeholder_Expression_On_ComposeQuery()
{
var filter =
Placeholder.Create((IQueryable <int> x) => x.Where(i => i > 2).Where(i => i < 5));
var l = new List <int>
{
1,
2,
3,
4,
5,
6
};
var res = l.AsQueryable().SelectMany(i => filter.Invoke(l.AsQueryable()).Select(j => new { i, j }))
.ComposeQuery().ToList();
res.Count.ShouldBe(l.Count * 2);
}
public void Should_Throw_On_Value_Placeholder_Value_Access()
{
var placeholder = Placeholder.Create(() => 5);
Should.Throw <NotImplementedException>(() => placeholder.Value);
}