Add unittest for json.

test/unit/utAssbinImportExport.cpp

@@ -5,8 +5,6 @@ Open Asset Import Library (assimp)
 
 Copyright (c) 2006-2019, assimp team
 
-
-
 All rights reserved.
 
 Redistribution and use of this software in source and binary forms,
@@ -53,8 +51,8 @@ using namespace Assimp;
 
 class utAssbinImportExport : public AbstractImportExportBase {
 public:
-    virtual bool importerTest() {
-        Assimp::Importer importer;
+    bool importerTest() override {
+        Importer importer;
         const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/spider.obj", aiProcess_ValidateDataStructure );
 
         Exporter exporter;
@@ -66,7 +64,7 @@ public:
 };
 
 TEST_F( utAssbinImportExport, exportAssbin3DFromFileTest ) {
-    Assimp::Importer importer;
+    Importer importer;
     const aiScene *scene = importer.ReadFile( ASSIMP_TEST_MODELS_DIR "/OBJ/spider.obj", aiProcess_ValidateDataStructure );
     EXPECT_NE( nullptr, scene );
 }