public async Task ExpireKeyAsyncTest()
{
var keyName = KeyName();
const string keyValue = "1.0";
await _redisService.RemoveAsync(keyName);
await _redisService.SetStringAsync(keyName, keyValue);
//check if the key exist
var result = await _redisService.GetStringAsync(keyName);
Assert.Equal(keyValue, result);
//expire the key
await _redisService.ExpireKeyAsync(keyName, TimeSpan.FromSeconds(2));
await Task.Delay(2100);
//check if the key exist
var result2 = await _redisService.GetStringAsync(keyName);
Assert.Null(result2);
}