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diff --git a/src/mesh/assimp-master/test/unit/utD3MFImportExport.cpp b/src/mesh/assimp-master/test/unit/utD3MFImportExport.cpp
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+++ b/src/mesh/assimp-master/test/unit/utD3MFImportExport.cpp
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+/*
+---------------------------------------------------------------------------
+Open Asset Import Library (assimp)
+---------------------------------------------------------------------------
+
+Copyright (c) 2006-2022, assimp team
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the following
+conditions are met:
+
+* Redistributions of source code must retain the above
+copyright notice, this list of conditions and the
+following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the
+following disclaimer in the documentation and/or other
+materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+contributors may be used to endorse or promote products
+derived from this software without specific prior
+written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+---------------------------------------------------------------------------
+*/
+#include "AbstractImportExportBase.h"
+#include "UnitTestPCH.h"
+
+#include <assimp/postprocess.h>
+#include <assimp/scene.h>
+#include <assimp/Exporter.hpp>
+#include <assimp/Importer.hpp>
+
+#include "AssetLib/3MF/D3MFExporter.h"
+
+class utD3MFImporterExporter : public AbstractImportExportBase {
+public:
+    bool importerTest() override {
+        Assimp::Importer importer;
+        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/3MF/box.3mf", aiProcess_ValidateDataStructure);
+        if (nullptr == scene) {
+            return false;
+        }
+
+        EXPECT_EQ(1u, scene->mNumMeshes);
+        aiMesh *mesh = scene->mMeshes[0];
+        EXPECT_NE(nullptr, mesh);
+        EXPECT_EQ(12u, mesh->mNumFaces);
+        EXPECT_EQ(8u, mesh->mNumVertices);
+
+        return (nullptr != scene);
+    }
+
+#ifndef ASSIMP_BUILD_NO_EXPORT
+
+    bool exporterTest() override {
+        Assimp::Importer importer;
+        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/3MF/box.3mf", 0);
+
+        Assimp::Exporter exporter;
+        return AI_SUCCESS == exporter.Export(scene, "3mf", "test.3mf");
+    }
+#endif // ASSIMP_BUILD_NO_EXPORT
+};
+
+TEST_F(utD3MFImporterExporter, import3MFFromFileTest) {
+    EXPECT_TRUE(importerTest());
+}
+
+#ifndef ASSIMP_BUILD_NO_EXPORT
+
+TEST_F(utD3MFImporterExporter, export3MFtoMemTest) {
+    EXPECT_TRUE(exporterTest());
+}
+
+TEST_F(utD3MFImporterExporter, roundtrip3MFtoMemTest) {
+    EXPECT_TRUE(exporterTest());
+
+    Assimp::Importer importer;
+    const aiScene *scene = importer.ReadFile("test.3mf", 0);
+    EXPECT_NE(nullptr, scene);
+}
+
+#endif // ASSIMP_BUILD_NO_EXPORT