//[TestMethod()]
        public async Task InitTestDirectory()
        {
            try
            {
                DropBoxBase dropboxBase = new DropBoxBase();

                await dropboxBase.CreateFolder("dir1");

                await dropboxBase.CreateFolder("dir2");

                var mathImgPath    = "F:/Imagens/math.jpg";
                var bugDeadImgPath = "F:/Imagens/testcase.png";
                var especPdfPath   = "C:/Users/Usuário/Downloads/Enunciado.pdf";

                await dropboxBase.Upload("dir1/math.jpg", mathImgPath);

                await dropboxBase.Upload("dir2/trab_teste_sw.pdf", especPdfPath);

                await dropboxBase.Upload(Path.GetFileName(bugDeadImgPath), bugDeadImgPath);

                dropboxBase.Close();
            }
            catch (Exception e)
            {
                Console.Write(e.ToString());
            }
        }
        //[TestMethod()]
        public async Task GetSharedLinkNotExistTest()
        {
            try
            {
                dropboxBase = new DropBoxBase();
                var url = await dropboxBase.GetSharedLink("dir2/trab_teste_sw.pdf");

                Assert.AreEqual(null, url);
                dropboxBase.Close();
            }
            catch (Exception e)
            {
                dropboxBase.Close();
                Console.Write(e.ToString());
                throw e;
            }
        }
        public async Task GetSharedLinkExistTest()
        {
            try
            {
                var urlExpected = "https://www.dropbox.com/s/j02x06nvxvlec33/math.jpg?dl=0";
                dropboxBase = new DropBoxBase();
                var url = await dropboxBase.GetSharedLink("dir1/math.jpg");

                dropboxBase.Close();

                Assert.AreEqual(urlExpected, url);
            }
            catch (Exception e)
            {
                dropboxBase.Close();
                Console.Write(e.ToString());
                throw e;
            }
        }
        //[TestMethod()]
        public async Task CreateSharedLinkTest()
        {
            try
            {
                dropboxBase = new DropBoxBase();
                var url = await dropboxBase.CreateSharedLink("dir1/math.jpg");

                dropboxBase.Close();

                Assert.AreNotEqual(null, url);
                Console.Write("url = {0}", url);
            }
            catch (Exception e)
            {
                dropboxBase.Close();
                Console.Write(e.ToString());
                throw e;
            }
        }