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diff --git a/libs/assimp/test/unit/utLimitBoneWeights.cpp b/libs/assimp/test/unit/utLimitBoneWeights.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 "UnitTestPCH.h"
+
+#include "PostProcessing/LimitBoneWeightsProcess.h"
+#include <assimp/scene.h>
+
+using namespace std;
+using namespace Assimp;
+
+class LimitBoneWeightsTest : public ::testing::Test {
+public:
+    LimitBoneWeightsTest() :
+            Test(), mProcess(nullptr), mMesh(nullptr) {
+        // empty
+    }
+
+protected:
+    virtual void SetUp();
+    virtual void TearDown();
+
+protected:
+    LimitBoneWeightsProcess *mProcess;
+    aiMesh *mMesh;
+};
+
+// ------------------------------------------------------------------------------------------------
+void LimitBoneWeightsTest::SetUp() {
+    // construct the process
+    this->mProcess = new LimitBoneWeightsProcess();
+
+    // now need to create a nice mesh for testing purposes
+    this->mMesh = new aiMesh();
+
+    mMesh->mNumVertices = 500;
+    mMesh->mVertices = new aiVector3D[500]; // uninit.
+    mMesh->mNumBones = 30;
+    mMesh->mBones = new aiBone *[30];
+    unsigned int iCur = 0;
+    for (unsigned int i = 0; i < 30; ++i) {
+        aiBone *pc = mMesh->mBones[i] = new aiBone();
+        pc->mNumWeights = 250;
+        pc->mWeights = new aiVertexWeight[pc->mNumWeights];
+        for (unsigned int qq = 0; qq < pc->mNumWeights; ++qq) {
+            aiVertexWeight &v = pc->mWeights[qq];
+            v.mVertexId = iCur++;
+            if (500 == iCur) {
+                iCur = 0;
+            }
+            v.mWeight = 1.0f / 15; // each vertex should occur once in two bones
+        }
+    }
+}
+
+// ------------------------------------------------------------------------------------------------
+void LimitBoneWeightsTest::TearDown() {
+    delete mMesh;
+    delete mProcess;
+}
+
+// ------------------------------------------------------------------------------------------------
+TEST_F(LimitBoneWeightsTest, testProcess) {
+    // execute the step on the given data
+    mProcess->ProcessMesh(mMesh);
+
+    // check whether everything is ok ...
+    typedef std::vector<LimitBoneWeightsProcess::Weight> VertexWeightList;
+    VertexWeightList *asWeights = new VertexWeightList[mMesh->mNumVertices];
+
+    for (unsigned int i = 0; i < mMesh->mNumVertices; ++i) {
+        asWeights[i].reserve(4);
+    }
+
+    // sort back as per-vertex lists
+    for (unsigned int i = 0; i < mMesh->mNumBones; ++i) {
+        aiBone &pcBone = **(mMesh->mBones + i);
+        for (unsigned int q = 0; q < pcBone.mNumWeights; ++q) {
+            aiVertexWeight weight = pcBone.mWeights[q];
+            asWeights[weight.mVertexId].push_back(LimitBoneWeightsProcess::Weight(i, weight.mWeight));
+        }
+    }
+
+    // now validate the size of the lists and check whether all weights sum to 1.0f
+    for (unsigned int i = 0; i < mMesh->mNumVertices; ++i) {
+        EXPECT_LE(asWeights[i].size(), 4U);
+        float fSum = 0.0f;
+        for (VertexWeightList::const_iterator iter = asWeights[i].begin(); iter != asWeights[i].end(); ++iter) {
+            fSum += (*iter).mWeight;
+        }
+        EXPECT_GE(fSum, 0.95F);
+        EXPECT_LE(fSum, 1.04F);
+    }
+
+    // delete allocated storage
+    delete[] asWeights;
+
+    // everything seems to be OK
+}