public async Task GetRegionsComboTest()
        {
            DataCovidAPI api = DataCovidAPI.getInstance();

            var result = await api.GetRegionsCombo();

            Assert.AreNotEqual(0, result.Count);
        }
        public async Task GetCasesWorldTest()
        {
            DataCovidAPI api = DataCovidAPI.getInstance();

            var result = await api.GetCasesWorld();

            Assert.IsInstanceOfType(result, typeof(List <TopRegionWorld>));
        }
        public async Task GetCasesWorldTestQty()
        {
            DataCovidAPI api = DataCovidAPI.getInstance();

            var result = await api.GetCasesWorld();

            Assert.AreEqual(10, result.Count);
        }
        public async Task GetCasesRegionTestIn()
        {
            DataCovidAPI api = DataCovidAPI.getInstance();

            var result = await api.GetCasesRegion("Guatemala");

            Assert.AreEqual(0, result.Count);
        }