public async Task GetAddressAsync_Error_Not_Thrown()
 {
     var api = new CaseStackApiMock();
     await api.GetAddressAsync("foo");
 }
 public void GetAddressAsync_HttpException_Thrown()
 {
     var api = new CaseStackApiMock();
     Assert.ThrowsAsync<HttpException>(() => api.GetAddressAsync("error"));
 }