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Observable comparers for SortAndBind (#884)
* Observable comparers for SortAndBind * Observable comparers for SortAndBind - test fixture
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111 changes: 111 additions & 0 deletions
111
src/DynamicData.Tests/Cache/SortAndBindObservableFixture.cs
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| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Reactive.Subjects; | ||
| using DynamicData.Binding; | ||
| using DynamicData.Tests.Domain; | ||
| using FluentAssertions; | ||
| using Xunit; | ||
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| namespace DynamicData.Tests.Cache; | ||
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| // Bind to a readonly observable collection | ||
| public sealed class SortAndBindObservableToReadOnlyObservableCollection : SortAndBindObservableFixture | ||
| { | ||
| protected override (ChangeSetAggregator<Person, string> Aggregrator, IList<Person> List) SetUpTests() | ||
| { | ||
| var aggregator = Cache.Connect().SortAndBind(out var list, ComparerObservable).AsAggregator(); | ||
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| return (aggregator, list); | ||
| } | ||
| } | ||
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| // Bind to a list | ||
| public sealed class SortAndBindObservableToList : SortAndBindObservableFixture | ||
| { | ||
| protected override (ChangeSetAggregator<Person, string> Aggregrator, IList<Person> List) SetUpTests() | ||
| { | ||
| var list = new List<Person>(100); | ||
| var aggregator = Cache.Connect().SortAndBind(list, ComparerObservable).AsAggregator(); | ||
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| return (aggregator, list); | ||
| } | ||
| } | ||
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| public abstract class SortAndBindObservableFixture : IDisposable | ||
| { | ||
| protected readonly ISourceCache<Person, string> Cache = new SourceCache<Person, string>(p => p.Name); | ||
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| private readonly RandomPersonGenerator _generator = new(); | ||
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| private readonly ChangeSetAggregator<Person, string> _results; | ||
| private readonly IList<Person> _boundList; | ||
| private readonly SortExpressionComparer<Person> _oldestComparer = SortExpressionComparer<Person>.Descending(p => p.Age).ThenByAscending(p => p.Name); | ||
| private readonly SortExpressionComparer<Person> _defaultComparer = SortExpressionComparer<Person>.Ascending(p => p.Name).ThenByAscending(p => p.Age); | ||
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| [System.Diagnostics.CodeAnalysis.SuppressMessage("Usage", "CA2213:Disposable fields should be disposed", Justification = "By Design.")] | ||
| protected readonly BehaviorSubject<IComparer<Person>> ComparerObservable; | ||
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| protected SortAndBindObservableFixture() | ||
| { | ||
| ComparerObservable = new BehaviorSubject<IComparer<Person>>(_defaultComparer); | ||
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| // It's ok in this case to call VirtualMemberCallInConstructor | ||
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| #pragma warning disable CA2214 | ||
| // ReSharper disable once VirtualMemberCallInConstructor | ||
| var args = SetUpTests(); | ||
| #pragma warning restore CA2214 | ||
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| // bind and sort in one hit | ||
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| _results = args.Aggregrator; | ||
| _boundList = args.List; | ||
| } | ||
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| protected abstract (ChangeSetAggregator<Person, string> Aggregrator, IList<Person> List) SetUpTests(); | ||
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| [Fact] | ||
| public void SortInitialBatch() | ||
| { | ||
| var people = _generator.Take(100).ToArray(); | ||
| Cache.AddOrUpdate(people); | ||
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| var defaultOrder = people.OrderBy(p => p, _defaultComparer).ToList(); | ||
| _boundList.SequenceEqual(defaultOrder).Should().BeTrue(); | ||
| } | ||
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| [Fact] | ||
| public void ChangeSort() | ||
| { | ||
| var people = _generator.Take(100).ToArray(); | ||
| Cache.AddOrUpdate(people); | ||
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| // change to oldest first sort | ||
| ComparerObservable.OnNext(_oldestComparer); | ||
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| var oldestFirst = people.OrderBy(p => p, _oldestComparer).ToList(); | ||
| _boundList.SequenceEqual(oldestFirst).Should().BeTrue(); | ||
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| // and back again | ||
| ComparerObservable.OnNext(_defaultComparer); | ||
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| var defaultOrder = people.OrderBy(p => p, _defaultComparer).ToList(); | ||
| _boundList.SequenceEqual(defaultOrder).Should().BeTrue(); | ||
| } | ||
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| public void Dispose() | ||
| { | ||
| Cache.Dispose(); | ||
| _results.Dispose(); | ||
| ComparerObservable.OnCompleted(); | ||
| } | ||
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| } |
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