public async Task ResultFalse(string id)
        {
            var command = new DeleteQuizCommand(id);
            var handler = new DeleteQuizHandler(_mock.Object);

            var result = await handler.Handle(command, CancellationToken.None);

            Assert.AreEqual(result, false);
        }
        public async Task ResultTrue()
        {
            var command = new DeleteQuizCommand("1");
            var handler = new DeleteQuizHandler(_mock.Object);

            var result = await handler.Handle(command, CancellationToken.None);

            Assert.AreEqual(result, true);
        }
        public async Task ResultNotNull()
        {
            var command = new DeleteQuizCommand("");
            var handler = new DeleteQuizHandler(_mock.Object);

            var result = await handler.Handle(command, CancellationToken.None);

            Assert.NotNull(result);
        }