From 67ba197d9c293edb75b726de6663dbbf5aba2f2b Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Fri, 29 Mar 2024 16:54:01 +0100
Subject: [PATCH] Test: add unit tests for mesh grid creation

---
 tests/src/Mod/Mesh/App/Mesh.cpp | 81 +++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)

diff --git a/tests/src/Mod/Mesh/App/Mesh.cpp b/tests/src/Mod/Mesh/App/Mesh.cpp
index 045ffadd52..af81caf393 100644
--- a/tests/src/Mod/Mesh/App/Mesh.cpp
+++ b/tests/src/Mod/Mesh/App/Mesh.cpp
@@ -1,5 +1,6 @@
 #include "gtest/gtest.h"
 #include <Mod/Mesh/App/Mesh.h>
+#include <Mod/Mesh/App/Core/Grid.h>
 
 // NOLINTBEGIN(cppcoreguidelines-*,readability-*)
 TEST(MeshTest, TestDefault)
@@ -14,4 +15,84 @@ TEST(MeshTest, TestDefault)
     EXPECT_EQ(kernel.CountEdges(), 3);
     EXPECT_EQ(kernel.CountFacets(), 1);
 }
+
+TEST(MeshTest, TestGrid1OfPlanarMesh)
+{
+    MeshCore::MeshKernel kernel;
+    Base::Vector3f p1 {0, 0, 0};
+    Base::Vector3f p2 {1, 0, 0};
+    Base::Vector3f p3 {0, 1, 0};
+    Base::Vector3f p4 {1, 1, 0};
+    kernel.AddFacet(MeshCore::MeshGeomFacet(p1, p2, p3));
+    kernel.AddFacet(MeshCore::MeshGeomFacet(p3, p2, p4));
+
+    MeshCore::MeshFacetGrid grid(kernel, 10);
+    unsigned long countX {};
+    unsigned long countY {};
+    unsigned long countZ {};
+    grid.GetCtGrids(countX, countY, countZ);
+    EXPECT_EQ(countX, 1);
+    EXPECT_EQ(countY, 1);
+    EXPECT_EQ(countZ, 1);
+}
+
+TEST(MeshTest, TestGrid2OfPlanarMesh)
+{
+    MeshCore::MeshKernel kernel;
+    Base::Vector3f p1 {0, 0, 0};
+    Base::Vector3f p2 {1, 0, 0};
+    Base::Vector3f p3 {0, 1, 0};
+    Base::Vector3f p4 {1, 1, 0};
+    kernel.AddFacet(MeshCore::MeshGeomFacet(p1, p2, p3));
+    kernel.AddFacet(MeshCore::MeshGeomFacet(p3, p2, p4));
+
+    MeshCore::MeshFacetGrid grid(kernel);
+    unsigned long countX {};
+    unsigned long countY {};
+    unsigned long countZ {};
+    grid.GetCtGrids(countX, countY, countZ);
+    EXPECT_EQ(countX, 1);
+    EXPECT_EQ(countY, 1);
+    EXPECT_EQ(countZ, 1);
+}
+
+TEST(MeshTest, TestGrid1OfAlmostPlanarMesh)
+{
+    MeshCore::MeshKernel kernel;
+    Base::Vector3f p1 {0, 0, 0};
+    Base::Vector3f p2 {1, 0, 0};
+    Base::Vector3f p3 {0, 1, 0};
+    Base::Vector3f p4 {1, 1, 1.0e-18F};
+    kernel.AddFacet(MeshCore::MeshGeomFacet(p1, p2, p3));
+    kernel.AddFacet(MeshCore::MeshGeomFacet(p3, p2, p4));
+
+    MeshCore::MeshFacetGrid grid(kernel, 10);
+    unsigned long countX {};
+    unsigned long countY {};
+    unsigned long countZ {};
+    grid.GetCtGrids(countX, countY, countZ);
+    EXPECT_EQ(countX, 1);
+    EXPECT_EQ(countY, 1);
+    EXPECT_EQ(countZ, 1);
+}
+
+TEST(MeshTest, TestGrid2OfAlmostPlanarMesh)
+{
+    MeshCore::MeshKernel kernel;
+    Base::Vector3f p1 {0, 0, 0};
+    Base::Vector3f p2 {1, 0, 0};
+    Base::Vector3f p3 {0, 1, 0};
+    Base::Vector3f p4 {1, 1, 1.0e-18F};
+    kernel.AddFacet(MeshCore::MeshGeomFacet(p1, p2, p3));
+    kernel.AddFacet(MeshCore::MeshGeomFacet(p3, p2, p4));
+
+    MeshCore::MeshFacetGrid grid(kernel);
+    unsigned long countX {};
+    unsigned long countY {};
+    unsigned long countZ {};
+    grid.GetCtGrids(countX, countY, countZ);
+    EXPECT_EQ(countX, 1);
+    EXPECT_EQ(countY, 1);
+    EXPECT_EQ(countZ, 1);
+}
 // NOLINTEND(cppcoreguidelines-*,readability-*)