Test: Add unit test to read in 3MF file

tests/src/Mod/Mesh/App/CMakeLists.txt

@@ -1,8 +1,11 @@
+target_compile_definitions(Mesh_tests_run PRIVATE DATADIR="${CMAKE_SOURCE_DIR}/data")
+
 target_sources(
     Mesh_tests_run
         PRIVATE
             ${CMAKE_CURRENT_SOURCE_DIR}/Core/KDTree.cpp
             ${CMAKE_CURRENT_SOURCE_DIR}/Exporter.cpp
+            ${CMAKE_CURRENT_SOURCE_DIR}/Importer.cpp
             ${CMAKE_CURRENT_SOURCE_DIR}/Mesh.cpp
             ${CMAKE_CURRENT_SOURCE_DIR}/MeshFeature.cpp
 )

tests/src/Mod/Mesh/App/Importer.cpp

@@ -0,0 +1,30 @@
+#include <gtest/gtest.h>
+#include <Base/FileInfo.h>
+#include <Mod/Mesh/App/Core/IO/Reader3MF.h>
+#include <zipios++/fcoll.h>
+
+// NOLINTBEGIN(cppcoreguidelines-*,readability-*)
+TEST(ImporterTest, Test3MF)
+{
+    std::string file(DATADIR);
+    file.append("/tests/mesh.3mf");
+
+    MeshCore::Reader3MF reader(file);
+    EXPECT_EQ(reader.Load(), true);
+
+    std::vector<int> ids = reader.GetMeshIds();
+    std::sort(ids.begin(), ids.end());
+
+    EXPECT_EQ(ids.size(), 2);
+
+    const MeshCore::MeshKernel& mesh1 = reader.GetMesh(ids[0]);
+    EXPECT_EQ(mesh1.CountPoints(), 8);
+    EXPECT_EQ(mesh1.CountEdges(), 18);
+    EXPECT_EQ(mesh1.CountFacets(), 12);
+
+    const MeshCore::MeshKernel& mesh2 = reader.GetMesh(ids[1]);
+    EXPECT_EQ(mesh2.CountPoints(), 652);
+    EXPECT_EQ(mesh2.CountEdges(), 1950);
+    EXPECT_EQ(mesh2.CountFacets(), 1300);
+}
+// NOLINTEND(cppcoreguidelines-*,readability-*)