Test to verify Linq bug on sub collection queries was fixed. Closed G…

…H-2563

src/LinqTests/Bugs/Bug_2563_sub_collection_queries_and_OR.cs

@@ -0,0 +1,58 @@
+using System.Linq;
+using System.Threading.Tasks;
+using Marten;
+using Marten.Testing.Harness;
+using Shouldly;
+using Xunit.Abstractions;
+
+namespace LinqTests.Bugs;
+
+public class Bug_2563_sub_collection_queries_and_OR : BugIntegrationContext
+{
+    private readonly ITestOutputHelper _output;
+
+    public Bug_2563_sub_collection_queries_and_OR(ITestOutputHelper output)
+    {
+        _output = output;
+    }
+
+    [Fact]
+    public async Task get_distinct_number()
+    {
+        theStore.Options.Schema.For<Target>()
+            .Duplicate(x => x.UserIds);
+
+        theSession.Store(new Target {Id = 1, IsPublic = false, UserIds = new [] { 1, 2, 3, 4, 5, 6 }});
+        theSession.Store(new Target {Id = 2, IsPublic = false, UserIds = new int[] { }});
+        theSession.Store(new Target {Id = 3, IsPublic = true, UserIds = new [] { 1, 2, 3 }});
+        theSession.Store(new Target {Id = 4, IsPublic = true, UserIds = new [] { 1, 2, 6 }});
+        theSession.Store(new Target {Id = 5, IsPublic = false, UserIds = new [] { 4, 5, 6 }});
+        theSession.Store(new Target {Id = 6, IsPublic = true, UserIds = new [] { 10 }});
+
+        await theSession.SaveChangesAsync();
+        theSession.Logger = new TestOutputMartenLogger(_output);
+
+
+        var result1 = await theSession.Query<Target>()
+            .Where(x => x.IsPublic == false || x.UserIds.Contains(10))
+            .ToListAsync();
+
+        result1.Count.ShouldBeEquivalentTo(4);
+
+        // This should pass without any error as the query will return results
+        var result2 = await theSession.Query<Target>().Where(x => x.IsPublic || x.UserIds.Contains(5)).ToListAsync();
+
+        result2.ShouldContain(x => x.Id == 1);
+        result2.ShouldContain(x => x.Id == 5);
+    }
+
+    public class Target
+    {
+        public int Id { get; set; }
+
+        public bool IsPublic { get; set; }
+
+        public int[] UserIds { get; set; }
+    }
+}
+