public void GroupJoin()
{
var employees = Employee.GetEmployeesArrayList();
var empOptions = EmployeeOptionEntry.GetEmployeeOptionEntries();
var linq = employees
.GroupJoin(
empOptions,
e => e.id,
o => o.id,
(e, os) => new
{
id = e.id,
name = $"{e.firstName} {e.lastName}",
options = os.Sum(o => o.optionsCount)
}).ToArray();
var meta = employees.MetaOperators()
.GroupJoinBox(
empOptions.MetaWrapper(),
e => e.id,
o => o.id,
pair => new
{
id = pair.First.id,
name = $"{pair.First.firstName} {pair.First.lastName}",
options = pair.Second.MetaOperators().Select(o => o.optionsCount).Sum()
}).ToArray();
Assert.Equal(linq, meta);
}
public void GroupJoinSecondHasOverhead()
{
var employees = Employee.GetEmployeesArrayList();
var empOptions = EmployeeOptionEntry.GetEmployeeOptionEntries();
var linq = employees
.GroupJoin(
empOptions.Where((entry, i) => i % 2 == 0),
e => e.id,
o => o.id,
(e, os) => new
{
id = e.id,
name = $"{e.firstName} {e.lastName}",
options = os.Sum(o => o.optionsCount)
}).ToArray();
var meta = employees.MetaOperators()
.GroupJoinBox(
empOptions.MetaOperators().WhereIndex(pair => pair.Index % 2 == 0).Collect,
e => e.id,
o => o.id,
pair => new
{
id = pair.First.id,
name = $"{pair.First.firstName} {pair.First.lastName}",
options = pair.Second.MetaOperators().Select(o => o.optionsCount).Sum()
}).ToArray();
Assert.Equal(linq, meta);
}
public void GroupBy()
{
var linq = EmployeeOptionEntry
.GetEmployeeOptionEntries()
.GroupBy(entry => entry.id)
.Select(entries => entries.ToList())
.ToList();
var meta = EmployeeOptionEntry
.GetEmployeeOptionEntries().MetaOperators()
.GroupBy(entry => entry.id)
.Select(pair => pair.Second.MetaOperators().ToList())
.ToList();
Assert.True(EmployeeOptionEntry.Compare(linq, meta));
}