From 5b01642cbc80f1b439108c2115d514335f4dd24b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=EA=B9=80=EA=B2=BD=EC=A2=85?= <kyungjong74@gmail.com>
Date: Fri, 12 Jun 2026 17:59:44 +0900
Subject: [PATCH] feat(euler-beam-3d): add beam topology

---
 phases/euler-beam-3d/index.json   |  3 ++-
 src/fesa/model/element.hpp        |  1 +
 tests/unit/model_element_test.cpp | 16 +++++++++++++++-
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/phases/euler-beam-3d/index.json b/phases/euler-beam-3d/index.json
index dad3bb2..3bd9e07 100644
--- a/phases/euler-beam-3d/index.json
+++ b/phases/euler-beam-3d/index.json
@@ -62,7 +62,8 @@
     {
       "step": 6,
       "name": "model-beam-topology",
-      "status": "pending",
+      "status": "completed",
+      "summary": "beam2 model topology added with unit test",
       "allowed_paths": [
         "src/fesa/model/element.hpp",
         "src/fesa/model/element.cpp",
diff --git a/src/fesa/model/element.hpp b/src/fesa/model/element.hpp
index ab7da3a..adc836c 100644
--- a/src/fesa/model/element.hpp
+++ b/src/fesa/model/element.hpp
@@ -9,6 +9,7 @@ namespace fesa::model {
 enum class ElementTopology {
     truss2,
     bar2,
+    beam2,
     unknown
 };
 
diff --git a/tests/unit/model_element_test.cpp b/tests/unit/model_element_test.cpp
index d66c7fc..ea0b40e 100644
--- a/tests/unit/model_element_test.cpp
+++ b/tests/unit/model_element_test.cpp
@@ -8,5 +8,19 @@ int main()
         {fesa::core::NodeId{1}, fesa::core::NodeId{2}},
         fesa::core::PropertyId{3}
     };
-    return element.node_ids().size() == 2 ? 0 : 1;
+
+    const fesa::model::Element beam{
+        fesa::core::ElementId{10},
+        fesa::model::ElementTopology::beam2,
+        {fesa::core::NodeId{1}, fesa::core::NodeId{2}},
+        fesa::core::PropertyId{7}
+    };
+
+    if (element.topology() != fesa::model::ElementTopology::bar2) {
+        return 1;
+    }
+    if (beam.topology() != fesa::model::ElementTopology::beam2) {
+        return 1;
+    }
+    return beam.node_ids().size() == 2 ? 0 : 1;
 }