From c946cf6a89bbeae7fb96a67b55d91b7ae0cfa48d Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Mon, 30 Mar 2026 12:41:14 +0000
Subject: kstd/flat_map: fix iterator reference

---
 libs/kstd/tests/src/flat_map.cpp | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'libs/kstd/tests/src')

diff --git a/libs/kstd/tests/src/flat_map.cpp b/libs/kstd/tests/src/flat_map.cpp
index cde136a..eb599af 100644
--- a/libs/kstd/tests/src/flat_map.cpp
+++ b/libs/kstd/tests/src/flat_map.cpp
@@ -4,6 +4,8 @@
 #include <catch2/catch_test_macros.hpp>
 
 #include <functional>
+#include <type_traits>
+#include <utility>
 
 SCENARIO("Flat Map initialization and construction", "[flat_map]")
 {
@@ -159,6 +161,29 @@ SCENARIO("Flat Map iterators", "[flat_map]")
         ++it;
         REQUIRE(it == map.cend());
       }
+
+      THEN("assignment through the proxy modifies the mapped value")
+      {
+        auto it = map.begin();
+
+        *it = std::pair{1, 100};
+
+        REQUIRE(it->second == 100);
+        REQUIRE(map.at(1) == 100);
+      }
+
+      THEN("structured bindings evaluate correctly")
+      {
+        auto it = map.cbegin();
+
+        auto [key, value] = *it;
+
+        REQUIRE(key == 1);
+        REQUIRE(value == 10);
+
+        STATIC_REQUIRE(std::is_same_v<decltype(key), int const &>);
+        STATIC_REQUIRE(std::is_same_v<decltype(value), int const &>);
+      }
     }
 
     WHEN("using reverse iterators")
-- 
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