From cfb81696c82059ca8ff31caefdc0ab32cb76105a Mon Sep 17 00:00:00 2001
From: aleksandr 'sasha' shtifanov <a.shtifanov@house-of-communication.com>
Date: Wed, 25 Mar 2026 11:29:04 +0100
Subject: [PATCH] Add integration test for a case when compiled query (with
 QueryPlanning) contains filtering by string colleciton

---
 ...search_by_string_and_string_collections.cs | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/LinqTests/Bugs/compiled_query_problem_with_search_by_string_and_string_collections.cs

diff --git a/src/LinqTests/Bugs/compiled_query_problem_with_search_by_string_and_string_collections.cs b/src/LinqTests/Bugs/compiled_query_problem_with_search_by_string_and_string_collections.cs
new file mode 100644
index 0000000000..7ea86f8c03
--- /dev/null
+++ b/src/LinqTests/Bugs/compiled_query_problem_with_search_by_string_and_string_collections.cs
@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Threading.Tasks;
+using Marten;
+using Marten.Linq;
+using Marten.Testing.Documents;
+using Marten.Testing.Harness;
+using Shouldly;
+
+namespace LinqTests.Bugs;
+
+public class compiled_query_problem_with_search_by_string_and_string_collections(DefaultStoreFixture fixture): IntegrationContext(fixture)
+{
+    protected override async Task fixtureSetup()
+    {
+        await theStore.Advanced.ResetAllData();
+    }
+
+    public class IssuesByTitles: ICompiledListQuery<Issue>, IQueryPlanning
+    {
+        [Marten.Events.CodeGeneration.MartenIgnore]
+        public required string[] Titles { get; set; }
+        public required string Status { get; set; }
+
+        public Expression<Func<IMartenQueryable<Issue>, IEnumerable<Issue>>> QueryIs()
+        {
+            return query => query.Where(x => x.Status == Status && x.Title.IsOneOf(Titles));
+        }
+        void IQueryPlanning.SetUniqueValuesForQueryPlanning()
+        {
+            Status = "status";
+            Titles = ["title"];
+        }
+    }
+
+    [Fact]
+    public async Task can_search_isOneOf_strings_with_compiled_queries_and_query_planning()
+    {
+        var issue1 = new Issue { Title = "Issue1", Status = "Open" };
+        var issue2 = new Issue { Title = "Issue2", Status = "Open"};
+        var issue3 = new Issue { Title = "Issue3", Status = "Open" };
+
+        theSession.Store(issue1, issue2, issue3);
+        await theSession.SaveChangesAsync();
+
+        await using var session = theStore.QuerySession();
+        var query = new IssuesByTitles { Titles = [issue1.Title, issue2.Title], Status = issue1.Status };
+        var issues = await session.QueryAsync(query);
+
+        issues.Count().ShouldBe(2);
+    }
+}