Added test for LiveStreamAggregation code file generation

src/EventSourcingTests/Projections/CodeGeneration/ProjectionCodeGenerationTests.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Linq;
+using JasperFx.CodeGeneration;
+using JasperFx.Core.Reflection;
+using Marten;
+using Marten.Events.Aggregation;
+using Marten.Events.Projections;
+using Shouldly;
+using Xunit;
+
+namespace EventSourcingTests.Projections.CodeGeneration;
+
+public class ProjectionCodeGenerationTests
+{
+    [Fact]
+    public void Snapshot_GeneratesCodeFile()
+    {
+        var options = new StoreOptions();
+        options.Connection("Dummy");
+
+        // Given
+        options.Projections.Snapshot<Something>(SnapshotLifecycle.Inline);
+
+        // When
+        var store = new DocumentStore(options);
+
+        // Then
+        store.Events.As<ICodeFileCollection>().BuildFiles()
+            .OfType<SingleStreamProjection<Something>>()
+            .ShouldHaveSingleItem();
+    }
+
+
+    [Fact]
+    public void LiveStreamAggregation_GeneratesCodeFile()
+    {
+        var options = new StoreOptions();
+        options.Connection("Dummy");
+
+        // Given
+        options.Projections.LiveStreamAggregation<Something>();
+
+        // When
+        var store = new DocumentStore(options);
+
+        // Then
+        store.Events.As<ICodeFileCollection>().BuildFiles()
+            .OfType<SingleStreamProjection<Something>>()
+            .ShouldHaveSingleItem();
+    }
+
+    public record SomethingHappened(Guid SomethingId, string SomethingSomething);
+
+    public record SomethingDifferentHappened(Guid SomethingId, string SomethingSomething);
+
+    public record Something(Guid Id, string SomethingSomething)
+    {
+        public static Something Create(SomethingHappened @event) =>
+            new Something(@event.SomethingId, @event.SomethingSomething);
+
+        public Something Apply(SomethingHappened @event) =>
+            this with { SomethingSomething = @event.SomethingSomething };
+    }
+}