public async Task GetTodo_AllValid_ReturnsNoContentResult()
{
// Arrange
var todoId = 1;
var mockService = new Mock <ITodosService>();
mockService.Setup(ts => ts.DeleteTodoByIdAsync(todoId));
var controller = new TodosController(mockService.Object);
// Action
var result = await controller.DeleteTodo(todoId);
// Assert
Assert.NotNull(result);
Assert.IsType <NoContentResult>(result);
mockService.Verify(ts => ts.DeleteTodoByIdAsync(todoId), Times.Once());
}