Fix to #27155 - Average_Grouped_from_LINQ_101 is non-deterministic

Added custom asserter that checks results within range, rather than adding sql server specific expected query
For the second test, added proper collection asserter so we can impose the order within nested collection.

Fixes #27155

test/EFCore.InMemory.FunctionalTests/Query/Ef6GroupByInMemoryTest.cs

@@ -10,15 +10,6 @@ public Ef6GroupByInMemoryTest(Ef6GroupByInMemoryFixture fixture, ITestOutputHelp
  {
  }
 
- public override Task Average_Grouped_from_LINQ_101(bool async)
- => AssertQuery(
- async,
- ss => from p in ss.Set<ProductForLinq>()
- group p by p.Category
- into g
- select new { Category = g.Key, AveragePrice = g.Average(p => p.UnitPrice) },
- elementSorter: e => (e.Category, e.AveragePrice));
-
  public class Ef6GroupByInMemoryFixture : Ef6GroupByFixtureBase
  {
  protected override ITestStoreFactory TestStoreFactory

test/EFCore.Specification.Tests/Query/Ef6GroupByTestBase.cs

@@ -410,11 +410,12 @@ public virtual Task Average_Grouped_from_LINQ_101(bool async)
  group p by p.Category
  into g
  select new { Category = g.Key, AveragePrice = g.Average(p => p.UnitPrice) },
- ss => from p in ss.Set<ProductForLinq>()
- group p by p.Category
- into g
- select new { Category = g.Key, AveragePrice = Math.Round(g.Average(p => p.UnitPrice) - 0.0000005m, 6) },
- elementSorter: e => (e.Category, e.AveragePrice));
+ elementSorter: e => (e.Category, e.AveragePrice),
+ elementAsserter: (e, a) =>
+ {
+ AssertEqual(e.Category, a.Category);
+ Assert.InRange(a.AveragePrice, e.AveragePrice - 0.00005m, e.AveragePrice + 0.00005m);
+ });
 
  [ConditionalTheory]
  [MemberData(nameof(IsAsyncData))]
@@ -644,7 +645,7 @@ in temp
  Assert.Equal(l.Id, r.Id);
  Assert.Equal(l.Age, r.Age);
  Assert.Equal(l.Style, r.Style);
- Assert.Equal(l.Values, r.Values);
+ AssertCollection(l.Values, r.Values, elementSorter: e => (e.Id, e.Style, e.Age));
  });
 
  [ConditionalTheory] // From #19506