assimp.assimp/test/unit/utglTF2ImportExport.cpp

/*
---------------------------------------------------------------------------
Open Asset Import Library (assimp)
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All rights reserved.

Redistribution and use of this software in source and binary forms,
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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,
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*/
#include "AbstractImportExportBase.h"
#include "UnitTestPCH.h"

#include <assimp/commonMetaData.h>
#include <assimp/postprocess.h>
#include <assimp/scene.h>
#include <assimp/Exporter.hpp>
#include <assimp/Importer.hpp>
#include <assimp/LogStream.hpp>
#include <assimp/DefaultLogger.hpp>


#include <array>

#include <assimp/pbrmaterial.h>
using namespace Assimp;

class utglTF2ImportExport : public AbstractImportExportBase {
public:
    virtual bool importerTest() {
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf",
                aiProcess_ValidateDataStructure);
        EXPECT_NE(scene, nullptr);
        if (!scene) {
            return false;
        }

        EXPECT_TRUE(scene->HasMaterials());
        if (!scene->HasMaterials()) {
            return false;
        }
        const aiMaterial *material = scene->mMaterials[0];

        aiString path;
        aiTextureMapMode modes[2];
        EXPECT_EQ(aiReturn_SUCCESS, material->GetTexture(aiTextureType_DIFFUSE, 0, &path, nullptr, nullptr,
                                            nullptr, nullptr, modes));
        EXPECT_STREQ(path.C_Str(), "CesiumLogoFlat.png");
        EXPECT_EQ(modes[0], aiTextureMapMode_Mirror);
        EXPECT_EQ(modes[1], aiTextureMapMode_Clamp);

        return true;
    }

    virtual bool binaryImporterTest() {
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/2CylinderEngine-glTF-Binary/2CylinderEngine.glb",
                aiProcess_ValidateDataStructure);
        return nullptr != scene;
    }

#ifndef ASSIMP_BUILD_NO_EXPORT
    virtual bool exporterTest() {
        Assimp::Importer importer;
        Assimp::Exporter exporter;
        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf",
                aiProcess_ValidateDataStructure);
        EXPECT_NE(nullptr, scene);
        EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "gltf2", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured_out.gltf"));

        return true;
    }
#endif // ASSIMP_BUILD_NO_EXPORT
};

TEST_F(utglTF2ImportExport, importglTF2FromFileTest) {
    EXPECT_TRUE(importerTest());
}

TEST_F(utglTF2ImportExport, importBinaryglTF2FromFileTest) {
    EXPECT_TRUE(binaryImporterTest());
}

#ifndef ASSIMP_BUILD_NO_EXPORT
TEST_F(utglTF2ImportExport, importglTF2AndExportToOBJ) {
    Assimp::Importer importer;
    Assimp::Exporter exporter;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf",
            aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "obj", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured_out.obj"));
}

TEST_F(utglTF2ImportExport, importglTF2EmbeddedAndExportToOBJ) {
    Assimp::Importer importer;
    Assimp::Exporter exporter;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF-Embedded/BoxTextured.gltf",
            aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "obj", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF-Embedded/BoxTextured_out.obj"));
}
#endif // ASSIMP_BUILD_NO_EXPORT

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModePointsWithoutIndices) {
    Assimp::Importer importer;
    //Points without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_00.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 1024u);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 1u);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], i);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLinesWithoutIndices) {
    Assimp::Importer importer;
    //Lines without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_01.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 8u);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 2u);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], i * 2u);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], i * 2u + 1u);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLinesLoopWithoutIndices) {
    Assimp::Importer importer;
    //Lines loop without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_02.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);

    std::array<unsigned int, 5> l1 = { { 0u, 1u, 2u, 3u, 0u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2u);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 2u);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], l1[i + 1u]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLinesStripWithoutIndices) {
    Assimp::Importer importer;
    //Lines strip without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_03.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 5u);

    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2u);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 2u);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], i);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], i + 1u);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesStripWithoutIndices) {
    Assimp::Importer importer;
    //Triangles strip without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_04.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2u);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
    std::array<unsigned int, 3> f1 = { { 0u, 1u, 2u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3u);
    for (unsigned int i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<unsigned int, 3> f2 = { { 2u, 1u, 3u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesFanWithoutIndices) {
    Assimp::Importer importer;
    //Triangles fan without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_05.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2u);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
    std::array<unsigned int, 3> f1 = { { 0u, 1u, 2u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<unsigned int, 3> f2 = { { 0u, 2u, 3u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesWithoutIndices) {
    Assimp::Importer importer;
    //Triangles without indices
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_06.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2u);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 6u);
    std::array<unsigned int, 3> f1 = { { 0u, 1u, 2u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<unsigned int, 3> f2 = { { 3u, 4u, 5u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModePoints) {
    Assimp::Importer importer;
    //Line loop
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_07.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 1024u);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mNumIndices, 1u);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], i);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLines) {
    Assimp::Importer importer;
    //Lines
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_08.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
    std::array<unsigned int, 5> l1 = { { 0u, 3u, 2u, 1u, 0u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2u);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], l1[i + 1]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLineLoop) {
    Assimp::Importer importer;
    //Line loop
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_09.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
    std::array<unsigned int, 5> l1 = { { 0, 3u, 2u, 1u, 0u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2u);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], l1[i + 1]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeLineStrip) {
    Assimp::Importer importer;
    //Lines Strip
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_10.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
    std::array<unsigned int, 5> l1 = { { 0u, 3u, 2u, 1u, 0u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 2u);
    for (unsigned int i = 0; i < scene->mMeshes[0]->mNumFaces; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[0], l1[i]);
        EXPECT_EQ(scene->mMeshes[0]->mFaces[i].mIndices[1], l1[i + 1]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesStrip) {
    Assimp::Importer importer;
    //Triangles strip
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_11.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2u);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
    std::array<unsigned int, 3> f1 = { { 0u, 3u, 1u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<unsigned int, 3> f2 = { { 1u, 3u, 2u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

TEST_F(utglTF2ImportExport, importglTF2PrimitiveModeTrianglesFan) {
    Assimp::Importer importer;
    //Triangles fan
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Asset-Generator/Mesh_PrimitiveMode/Mesh_PrimitiveMode_12.gltf", aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 4u);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 2u);
    std::array<unsigned int, 3> f1 = { { 0u, 3u, 2u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[0].mIndices[i], f1[i]);
    }

    std::array<unsigned int, 3> f2 = { { 0u, 2u, 1u } };
    EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mNumIndices, 3u);
    for (size_t i = 0; i < 3; ++i) {
        EXPECT_EQ(scene->mMeshes[0]->mFaces[1].mIndices[i], f2[i]);
    }
}

std::vector<char> ReadFile(const char *name) {
    std::vector<char> ret;

    FILE *p = ::fopen(name, "r");
    if (nullptr == p) {
        return ret;
    }

    ::fseek(p, 0, SEEK_END);
    const size_t size = ::ftell(p);
    ::fseek(p, 0, SEEK_SET);

    ret.resize(size);
    const size_t readSize = ::fread(&ret[0], 1, size, p);
    EXPECT_EQ(readSize, size);
    ::fclose(p);

    return ret;
}

TEST_F(utglTF2ImportExport, importglTF2FromMemory) {
    /*const auto flags = aiProcess_CalcTangentSpace | aiProcess_Triangulate | aiProcess_RemoveComponent |
        aiProcess_GenSmoothNormals | aiProcess_PreTransformVertices | aiProcess_FixInfacingNormals |
        aiProcess_FindDegenerates | aiProcess_GenUVCoords | aiProcess_SortByPType;
    const auto& buff = ReadFile("C:\\Users\\kimkulling\\Downloads\\camel\\camel\\scene.gltf");*/
    /*const aiScene* Scene = ::aiImportFileFromMemory(&buff[0], buff.size(), flags, ".gltf");
    EXPECT_EQ( nullptr, Scene );*/
}

TEST_F(utglTF2ImportExport, bug_import_simple_skin) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/simple_skin/simple_skin.gltf",
            aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
}

TEST_F(utglTF2ImportExport, import_cameras) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/cameras/Cameras.gltf",
            aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
}

TEST_F(utglTF2ImportExport, incorrect_vertex_arrays) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/IncorrectVertexArrays/Cube.gltf",
            aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
    EXPECT_EQ(scene->mMeshes[0]->mNumVertices, 36u);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 12u);
    EXPECT_EQ(scene->mMeshes[1]->mNumVertices, 35u);
    EXPECT_EQ(scene->mMeshes[1]->mNumFaces, 11u);
    EXPECT_EQ(scene->mMeshes[2]->mNumVertices, 36u);
    EXPECT_EQ(scene->mMeshes[2]->mNumFaces, 18u);
    EXPECT_EQ(scene->mMeshes[3]->mNumVertices, 35u);
    EXPECT_EQ(scene->mMeshes[3]->mNumFaces, 17u);
    EXPECT_EQ(scene->mMeshes[4]->mNumVertices, 36u);
    EXPECT_EQ(scene->mMeshes[4]->mNumFaces, 12u);
    EXPECT_EQ(scene->mMeshes[5]->mNumVertices, 35u);
    EXPECT_EQ(scene->mMeshes[5]->mNumFaces, 11u);
    EXPECT_EQ(scene->mMeshes[6]->mNumVertices, 36u);
    EXPECT_EQ(scene->mMeshes[6]->mNumFaces, 18u);
    EXPECT_EQ(scene->mMeshes[7]->mNumVertices, 35u);
    EXPECT_EQ(scene->mMeshes[7]->mNumFaces, 17u);
}

TEST_F(utglTF2ImportExport, texture_transform_test) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/textureTransform/TextureTransformTest.gltf",
            aiProcess_ValidateDataStructure);
    EXPECT_NE(nullptr, scene);
}

#ifndef ASSIMP_BUILD_NO_EXPORT
TEST_F(utglTF2ImportExport, exportglTF2FromFileTest) {
    EXPECT_TRUE(exporterTest());
}

TEST_F(utglTF2ImportExport, crash_in_anim_mesh_destructor) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Sample-Models/AnimatedMorphCube-glTF/AnimatedMorphCube.gltf",
            aiProcess_ValidateDataStructure);
    ASSERT_NE(nullptr, scene);
    Assimp::Exporter exporter;
    ASSERT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "glb2", ASSIMP_TEST_MODELS_DIR "/glTF2/glTF-Sample-Models/AnimatedMorphCube-glTF/AnimatedMorphCube_out.glTF"));
}

TEST_F(utglTF2ImportExport, error_string_preserved) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/MissingBin/BoxTextured.gltf",
            aiProcess_ValidateDataStructure);
    ASSERT_EQ(nullptr, scene);
    std::string error = importer.GetErrorString();
    ASSERT_NE(error.find("BoxTextured0.bin"), std::string::npos) << "Error string should contain an error about missing .bin file";
}

TEST_F(utglTF2ImportExport, export_bad_accessor_bounds) {
    Assimp::Importer importer;
    Assimp::Exporter exporter;
    const aiScene* scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxWithInfinites-glTF-Binary/BoxWithInfinites.glb", aiProcess_ValidateDataStructure);
    ASSERT_NE(scene, nullptr);

    EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "glb2", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxWithInfinites-glTF-Binary/BoxWithInfinites_out.glb"));
    EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "gltf2", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxWithInfinites-glTF-Binary/BoxWithInfinites_out.gltf"));
}

TEST_F(utglTF2ImportExport, export_normalized_normals) {
    Assimp::Importer importer;
    Assimp::Exporter exporter;
    const aiScene* scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxBadNormals-glTF-Binary/BoxBadNormals.glb", aiProcess_ValidateDataStructure);
    ASSERT_NE(scene, nullptr);
    EXPECT_EQ(aiReturn_SUCCESS, exporter.Export(scene, "glb2", ASSIMP_TEST_MODELS_DIR "/glTF2/BoxBadNormals-glTF-Binary/BoxBadNormals_out.glb"));

    // load in again and ensure normal-length normals but no Nan's or Inf's introduced
    scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxBadNormals-glTF-Binary/BoxBadNormals_out.glb", aiProcess_ValidateDataStructure);
    for ( auto i = 0u; i < scene->mMeshes[0]->mNumVertices; ++i ) {
        const auto length = scene->mMeshes[0]->mNormals[i].Length();
        EXPECT_TRUE(abs(length) < 1e-6 || abs(length - 1) < 1e-6);
    }
}

#endif // ASSIMP_BUILD_NO_EXPORT

TEST_F(utglTF2ImportExport, sceneMetadata) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTextured-glTF/BoxTextured.gltf",
            aiProcess_ValidateDataStructure);
    ASSERT_NE(scene, nullptr);
    ASSERT_NE(scene->mMetaData, nullptr);
    {
        ASSERT_TRUE(scene->mMetaData->HasKey(AI_METADATA_SOURCE_FORMAT));
        aiString format;
        ASSERT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_FORMAT, format));
        ASSERT_EQ(strcmp(format.C_Str(), "glTF2 Importer"), 0);
    }
    {
        ASSERT_TRUE(scene->mMetaData->HasKey(AI_METADATA_SOURCE_FORMAT_VERSION));
        aiString version;
        ASSERT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_FORMAT_VERSION, version));
        ASSERT_EQ(strcmp(version.C_Str(), "2.0"), 0);
    }
    {
        ASSERT_TRUE(scene->mMetaData->HasKey(AI_METADATA_SOURCE_GENERATOR));
        aiString generator;
        ASSERT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_GENERATOR, generator));
        ASSERT_EQ(strcmp(generator.C_Str(), "COLLADA2GLTF"), 0);
    }
}

TEST_F(utglTF2ImportExport, texcoords) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/BoxTexcoords-glTF/boxTexcoords.gltf",
            aiProcess_ValidateDataStructure);
    ASSERT_NE(scene, nullptr);

    ASSERT_TRUE(scene->HasMaterials());
    const aiMaterial *material = scene->mMaterials[0];

    aiString path;
    aiTextureMapMode modes[2];
    EXPECT_EQ(aiReturn_SUCCESS, material->GetTexture(aiTextureType_DIFFUSE, 0, &path, nullptr, nullptr,
                                        nullptr, nullptr, modes));
    EXPECT_STREQ(path.C_Str(), "texture.png");

    int uvIndex = -1;
    EXPECT_EQ(aiGetMaterialInteger(material, AI_MATKEY_GLTF_TEXTURE_TEXCOORD(aiTextureType_DIFFUSE, 0), &uvIndex), aiReturn_SUCCESS);
    EXPECT_EQ(uvIndex, 0);

    // Using manual macro expansion of AI_MATKEY_GLTF_PBRMETALLICROUGHNESS_METALLICROUGHNESS_TEXTURE here.
    // The following works with some but not all compilers:
    // #define APPLY(X, Y) X(Y)
    // ..., APPLY(AI_MATKEY_GLTF_TEXTURE_TEXCOORD, AI_MATKEY_GLTF_PBRMETALLICROUGHNESS_METALLICROUGHNESS_TEXTURE), ...
    EXPECT_EQ(aiGetMaterialInteger(material, AI_MATKEY_GLTF_TEXTURE_TEXCOORD(aiTextureType_UNKNOWN, 0), &uvIndex), aiReturn_SUCCESS);
    EXPECT_EQ(uvIndex, 1);
}

TEST_F(utglTF2ImportExport, recursive_nodes) {
    Assimp::Importer importer;
    const aiScene* scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/RecursiveNodes/RecursiveNodes.gltf", aiProcess_ValidateDataStructure);
    EXPECT_EQ(nullptr, scene);
}

TEST_F(utglTF2ImportExport, norootnode_noscene) {
    Assimp::Importer importer;
    const aiScene* scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/TestNoRootNode/NoScene.gltf", aiProcess_ValidateDataStructure);
    ASSERT_EQ(scene, nullptr);
}

TEST_F(utglTF2ImportExport, norootnode_scenewithoutnodes) {
    Assimp::Importer importer;
    const aiScene* scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/TestNoRootNode/SceneWithoutNodes.gltf", aiProcess_ValidateDataStructure);
    ASSERT_NE(scene, nullptr);
    ASSERT_NE(scene->mRootNode, nullptr);
}

// Shall not crash!
TEST_F(utglTF2ImportExport, norootnode_issue_3269) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/issue_3269/texcoord_crash.gltf", aiProcess_ValidateDataStructure);
    ASSERT_EQ(scene, nullptr);
}

TEST_F(utglTF2ImportExport, indexOutOfRange) {
    // The contents of an asset should not lead to an assert.
    Assimp::Importer importer;

    struct LogObserver : Assimp::LogStream {
        bool m_observedWarning = false;
        void write(const char *message) override {
            m_observedWarning = m_observedWarning || std::strstr(message, "faces were dropped");
        }
    };
    LogObserver logObserver;
    
    DefaultLogger::get()->attachStream(&logObserver);
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/IndexOutOfRange/IndexOutOfRange.gltf", aiProcess_ValidateDataStructure);
    ASSERT_NE(scene, nullptr);
    ASSERT_NE(scene->mRootNode, nullptr);
    ASSERT_EQ(scene->mNumMeshes, 1u);
    EXPECT_EQ(scene->mMeshes[0]->mNumFaces, 11u);
    DefaultLogger::get()->detachStream(&logObserver);
    EXPECT_TRUE(logObserver.m_observedWarning);
}

TEST_F(utglTF2ImportExport, allIndicesOutOfRange) {
    // The contents of an asset should not lead to an assert.
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/IndexOutOfRange/AllIndicesOutOfRange.gltf", aiProcess_ValidateDataStructure);
    ASSERT_EQ(scene, nullptr);
    std::string error = importer.GetErrorString();
    ASSERT_NE(error.find("Mesh \"Mesh\" has no faces"), std::string::npos);
}

/////////////////////////////////
// Draco decoding

TEST_F(utglTF2ImportExport, import_dracoEncoded) {
    Assimp::Importer importer;
    const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR "/glTF2/draco/2CylinderEngine.gltf",
            aiProcess_ValidateDataStructure);
#ifndef ASSIMP_ENABLE_DRACO
    // No draco support, scene should not load
    ASSERT_EQ(scene, nullptr);
#else
    ASSERT_NE(scene, nullptr);
    ASSERT_NE(scene->mMetaData, nullptr);
    {
        ASSERT_TRUE(scene->mMetaData->HasKey(AI_METADATA_SOURCE_FORMAT));
        aiString format;
        ASSERT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_FORMAT, format));
        ASSERT_EQ(strcmp(format.C_Str(), "glTF2 Importer"), 0);
    }
    {
        ASSERT_TRUE(scene->mMetaData->HasKey(AI_METADATA_SOURCE_FORMAT_VERSION));
        aiString version;
        ASSERT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_FORMAT_VERSION, version));
        ASSERT_EQ(strcmp(version.C_Str(), "2.0"), 0);
    }
    {
        ASSERT_TRUE(scene->mMetaData->HasKey(AI_METADATA_SOURCE_GENERATOR));
        aiString generator;
        ASSERT_TRUE(scene->mMetaData->Get(AI_METADATA_SOURCE_GENERATOR, generator));
        ASSERT_EQ(strcmp(generator.C_Str(), "COLLADA2GLTF"), 0);
    }
#endif
}

TEST_F(utglTF2ImportExport, wrongTypes) {
    // Deliberately broken version of the BoxTextured.gltf asset.
    std::vector<std::tuple<std::string, std::string, std::string, std::string>> wrongTypes = {
        { "/glTF2/wrongTypes/badArray.gltf", "array", "primitives", "meshes[0]" },
        { "/glTF2/wrongTypes/badString.gltf", "string", "name", "scenes[0]" },
        { "/glTF2/wrongTypes/badUint.gltf", "uint", "index", "materials[0]" },
        { "/glTF2/wrongTypes/badNumber.gltf", "number", "scale", "materials[0]" },
        { "/glTF2/wrongTypes/badObject.gltf", "object", "pbrMetallicRoughness", "materials[0]" },
        { "/glTF2/wrongTypes/badExtension.gltf", "object", "KHR_texture_transform", "materials[0]" }
    };
    for (const auto& tuple : wrongTypes)
    {
        const auto& file = std::get<0>(tuple);
        const auto& type = std::get<1>(tuple);
        const auto& member = std::get<2>(tuple);
        const auto& context = std::get<3>(tuple);
        Assimp::Importer importer;
        const aiScene *scene = importer.ReadFile(ASSIMP_TEST_MODELS_DIR + file , aiProcess_ValidateDataStructure);
        ASSERT_EQ(scene, nullptr);
        const std::string error = importer.GetErrorString();
        EXPECT_FALSE(error.empty());
        EXPECT_NE(error.find(member + "\" was not of type \"" + type + "\" when reading " + context), std::string::npos);
    }
}