public async Task GetFileHashAsyncTest()
        {
            // Arrange
            var handler = new BCryptHash(workFactor);

            // Act
            string hash = await handler.GetFileHashAsync(filename);

            // Assert
            Assert.IsTrue(hash.Length > 0);
        }
        public async Task GetAndCheckFileHashTest()
        {
            // Arrange
            var handler = new BCryptHash(workFactor);

            // Act
            string hash = await handler.GetFileHashAsync(filename);

            bool matches = await handler.CheckFileHashAsync(filename, hash);

            // Assert
            Assert.IsTrue(matches);
        }