From ac8d24a2cfe02009d66c443f8c6ccc6d92132663 Mon Sep 17 00:00:00 2001
From: "KOKO\\Mimi" <kjkim2584@gmail.com>
Date: Sat, 1 Aug 2026 23:40:56 +0900
Subject: [PATCH] test(assembly): cover deterministic kernel failures

---
 .../unit/assembly/parallel_assembler_test.cpp | 77 +++++++++++++++++++
 1 file changed, 77 insertions(+)

diff --git a/tests/unit/assembly/parallel_assembler_test.cpp b/tests/unit/assembly/parallel_assembler_test.cpp
index e10ff15..baaa3c2 100644
--- a/tests/unit/assembly/parallel_assembler_test.cpp
+++ b/tests/unit/assembly/parallel_assembler_test.cpp
@@ -5,7 +5,9 @@
 #include <bit>
 #include <cstddef>
 #include <cstdint>
+#include <limits>
 #include <stdexcept>
+#include <string>
 #include <utility>
 #include <vector>
 
@@ -123,6 +125,59 @@ fesa::Domain build_beam_domain(const bool branched) {
         });
 }
 
+fesa::Domain build_multiple_kernel_failure_domain() {
+    fesa::DomainBuilder builder;
+    builder.add_node({
+        fesa::NodeId{0},
+        fesa::EntityOrigin{"BeamPart", "Beam-1", 1},
+        fesa::Vec3{0.0, 0.0, 0.0},
+    });
+    builder.add_node({
+        fesa::NodeId{1},
+        fesa::EntityOrigin{"BeamPart", "Beam-1", 2},
+        fesa::Vec3{1.0, 0.0, 0.0},
+    });
+
+    auto material = fesa::IsotropicElastic{
+        fesa::MaterialId{0},
+        "Invalid",
+        std::numeric_limits<double>::max(),
+        0.3,
+    };
+    builder.add_material(std::move(material));
+    auto section = fesa::BeamSection{
+        fesa::SectionId{0},
+        "Invalid",
+        std::numeric_limits<double>::max(),
+        1.0,
+        1.0,
+        1.0,
+        1.0,
+        1.0,
+        fesa::ShearPropertySource::input,
+        fesa::Vec3{0.0, 1.0, 0.0},
+        {},
+    };
+    builder.add_section(std::move(section));
+
+    builder.add_beam_element({
+        fesa::ElementId{0},
+        fesa::EntityOrigin{"BeamPart", "Beam-1", 20},
+        {fesa::NodeId{0}, fesa::NodeId{1}},
+        fesa::MaterialId{0},
+        fesa::SectionId{0},
+    });
+    builder.add_beam_element({
+        fesa::ElementId{1},
+        fesa::EntityOrigin{"BeamPart", "Beam-1", 10},
+        {fesa::NodeId{0}, fesa::NodeId{1}},
+        fesa::MaterialId{0},
+        fesa::SectionId{0},
+    });
+
+    return finish_domain(std::move(builder), {"Load", {}, {}});
+}
+
 std::vector<std::uint64_t> bits(const std::vector<double>& values) {
     std::vector<std::uint64_t> result;
     result.reserve(values.size());
@@ -186,4 +241,26 @@ TEST(TbbElementEvaluation, RejectsZeroExecutionLimits) {
         std::invalid_argument);
 }
 
+TEST(TbbElementEvaluation, ReportsFirstFailureByCanonicalElementOrigin) {
+    const fesa::Domain domain = build_multiple_kernel_failure_domain();
+    const fesa::DofManager dofs = fesa::DofManager::build(domain);
+
+    for (const std::size_t threads : {std::size_t{1}, std::size_t{4}}) {
+        SCOPED_TRACE(::testing::Message{} << "threads=" << threads);
+        try {
+            static_cast<void>(
+                fesa::assemble_parallel(domain, dofs, {threads, 1}));
+            FAIL() << "Expected a Beam kernel failure.";
+        } catch (const std::runtime_error& error) {
+            const std::string message{error.what()};
+            EXPECT_NE(
+                message.find("Beam element 10 kernel failed"),
+                std::string::npos);
+            EXPECT_EQ(
+                message.find("Beam element 20 kernel failed"),
+                std::string::npos);
+        }
+    }
+}
+
 }  // namespace