From 24bf28a8fb9cc8c3a90b77de9b60728bece7885d Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Sat, 18 Oct 2025 18:01:14 +0200
Subject: Moving project structure for more less compilation

---
 lib/tests/vtk_write.cpp | 64 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 lib/tests/vtk_write.cpp

(limited to 'lib/tests/vtk_write.cpp')

diff --git a/lib/tests/vtk_write.cpp b/lib/tests/vtk_write.cpp
new file mode 100644
index 0000000..0df9998
--- /dev/null
+++ b/lib/tests/vtk_write.cpp
@@ -0,0 +1,64 @@
+#include <forstio/test/suite.hpp>
+
+#include <iostream>
+#include "../c++/write_vtk.hpp"
+
+#include <sstream>
+
+namespace {
+namespace sch {
+using namespace kel::lbm::sch;
+
+using T = Float64;
+using D2Q5 = Descriptor<2,5>;
+using D2Q9 = Descriptor<2,9>;
+
+template<typename Desc>
+using DfCell = Cell<T, Desc, 0, 0, 1>;
+
+template<typename Desc>
+using CellInfo = Cell<UInt8, D2Q9, 1, 0, 0>;
+
+/**
+ * Basic type for simulation
+ */
+template<typename Desc>
+using CellStruct = Struct<
+	Member<DfCell<Desc>, "dfs">,
+	Member<DfCell<Desc>, "dfs_old">,
+	Member<CellInfo<Desc>, "info">
+>;
+
+template<typename T, uint64_t D>
+using MacroStruct = Struct<
+	Member<FixedArray<T,D>, "velocity">,
+	Member<T, "pressure">
+>;
+
+}
+
+SAW_TEST("VTK Write test example"){
+	using namespace kel;
+
+	// write_vtk();
+
+	std::stringstream sstream;
+
+	saw::data<sch::Array<sch::MacroStruct<sch::T,2>, 2>> cells{{{2u,2u}}};
+
+	auto& cell_0 = cells.at({{{0,0}}});
+	cell_0.template get<"velocity">()= {{0.5,-0.1}};
+	cell_0.template get<"pressure">().set(1.1);
+
+	auto eov = lbm::impl::lbm_vtk_writer<sch::Array<sch::MacroStruct<sch::T,2>, 2>>::apply(sstream, cells);
+	SAW_EXPECT(eov.is_value(), "vtk writer failed to write");
+
+	// I want to print it to see it for myself. For now I have no tooling to more easily view associated and potentially generated files
+	std::cout<<sstream.str()<<std::endl;
+
+	static std::string_view comparison_str = "# vtk DataFile Version 3.0\nLBM File\nASCII\nDATASET STRUCTURED_POINTS\nSPACING 1.0 1.0 1.0\nORIGIN 0.0 0.0 0.0\nDIMENSIONS 2 2 1\nPOINT_DATA 4\n\nVECTORS velocity float\n0.5 -0.1 0\n0 0 0\n0 0 0\n0 0 0\nSCALARS pressure float\nLOOKUP_TABLE default\n1.1\n0\n0\n0\n";
+	SAW_EXPECT(sstream.str() == comparison_str, "Expected different encoding");
+
+	// using Type = typename parameter_pack_type<i,T...>::type;
+}
+}
-- 
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