Update scheduling parameters and refactor channel endpoints: extend HorizonDays to 7 and RetentionDays to 90 in appsettings.json. Consolidate channel-related endpoint logic by removing obsolete files and enhancing the ShowEndpoints with audience and genre management capabilities. Improve error handling and streamline command handlers for channel operations.

backend/tests/TeleWave.Domain.Tests/Library/CollectionTests.cs

@@ -0,0 +1,106 @@
+using TeleWave.Domain.Library;
+using Xunit;
+
+namespace TeleWave.Domain.Tests.Library;
+
+public class CollectionTests
+{
+    private static IReadOnlyList<Guid> Order(Collection collection) =>
+        collection.Items.OrderBy(i => i.Position).Select(i => i.ShowId).ToList();
+
+    [Fact]
+    public void AddShow_AppendsToEnd()
+    {
+        var collection = Collection.Create("Терминатор");
+        var first = Guid.NewGuid();
+        var second = Guid.NewGuid();
+
+        collection.AddShow(first);
+        collection.AddShow(second);
+
+        Assert.Equal([first, second], Order(collection));
+    }
+
+    [Fact]
+    public void AddShow_Duplicate_ReturnsNull()
+    {
+        var collection = Collection.Create("Терминатор");
+        var showId = Guid.NewGuid();
+
+        collection.AddShow(showId);
+
+        Assert.Null(collection.AddShow(showId));
+        Assert.Single(collection.Items);
+    }
+
+    [Fact]
+    public void RemoveShow_ReturnsFalse_WhenNotPresent()
+    {
+        var collection = Collection.Create("Терминатор");
+
+        Assert.False(collection.RemoveShow(Guid.NewGuid()));
+    }
+
+    [Fact]
+    public void Reorder_AppliesRequestedOrder()
+    {
+        var collection = Collection.Create("Терминатор");
+        var a = Guid.NewGuid();
+        var b = Guid.NewGuid();
+        var c = Guid.NewGuid();
+        collection.AddShow(a);
+        collection.AddShow(b);
+        collection.AddShow(c);
+
+        collection.Reorder([c, a, b]);
+
+        Assert.Equal([c, a, b], Order(collection));
+        Assert.Equal([0, 1, 2], collection.Items.OrderBy(i => i.Position).Select(i => i.Position));
+    }
+
+    [Fact]
+    public void Reorder_KeepsUnmentionedAfterRequested_InOriginalOrder()
+    {
+        var collection = Collection.Create("Терминатор");
+        var a = Guid.NewGuid();
+        var b = Guid.NewGuid();
+        var c = Guid.NewGuid();
+        collection.AddShow(a);
+        collection.AddShow(b);
+        collection.AddShow(c);
+
+        // Перетащили только один элемент — остальные не должны потеряться или перемешаться.
+        collection.Reorder([c]);
+
+        Assert.Equal([c, a, b], Order(collection));
+    }
+
+    [Fact]
+    public void Reorder_IgnoresUnknownShows()
+    {
+        var collection = Collection.Create("Терминатор");
+        var a = Guid.NewGuid();
+        collection.AddShow(a);
+
+        collection.Reorder([Guid.NewGuid(), a]);
+
+        Assert.Equal([a], Order(collection));
+    }
+
+    [Fact]
+    public void RemoveThenAdd_DoesNotReusePosition()
+    {
+        var collection = Collection.Create("Терминатор");
+        var a = Guid.NewGuid();
+        var b = Guid.NewGuid();
+        collection.AddShow(a);
+        collection.AddShow(b);
+
+        collection.RemoveShow(a);
+        var c = Guid.NewGuid();
+        collection.AddShow(c);
+
+        // Новая часть встаёт после существующих, а не занимает освободившийся номер.
+        Assert.Equal([b, c], Order(collection));
+    }
+}