// Trigger delta update correctly to see if it performs correctly on an empty cache
public async Task Delta_Update_Perform_Correctly_On_Empty_Cache()
{
string gatewayId = NewUniqueEUI64();
DateTime dateTime = DateTime.UtcNow;
List <DevAddrCacheInfo> managerInput = new List <DevAddrCacheInfo>();
for (int i = 0; i < 5; i++)
{
managerInput.Add(new DevAddrCacheInfo()
{
DevEUI = NewUniqueEUI64(),
DevAddr = NewUniqueEUI32(),
GatewayId = gatewayId,
LastUpdatedTwins = dateTime
});
}
var devAddrJoining = managerInput[0].DevAddr;
// The cache start as empty
var registryManagerMock = this.InitRegistryManager(managerInput);
// initialize locks for test to run correctly
string[] neededLocksForTestToRun = new string[2] {
GlobalDevAddrUpdateKey, DeltaUpdateKey
};
var locksGuideTest = new string[1] {
FullUpdateKey
};
await LockDevAddrHelper.PrepareLocksForTests(this.cache, neededLocksForTestToRun, locksGuideTest);
LoRaDevAddrCache devAddrCache = new LoRaDevAddrCache(this.cache, null, gatewayId);
await devAddrCache.PerformNeededSyncs(registryManagerMock.Object);
while (!string.IsNullOrEmpty(this.cache.StringGet(GlobalDevAddrUpdateKey)))
{
await Task.Delay(100);
}
var foundItem = 0;
// we expect the devices are saved
for (int i = 0; i < 5; i++)
{
var queryResult = this.cache.GetHashObject(string.Concat(CacheKeyPrefix, managerInput[i].DevAddr));
if (queryResult.Length > 0)
{
foundItem++;
Assert.Single(queryResult);
var resultObject = JsonConvert.DeserializeObject <DevAddrCacheInfo>(queryResult[0].Value);
Assert.Equal(managerInput[i].GatewayId, resultObject.GatewayId);
Assert.Equal(managerInput[i].DevEUI, resultObject.DevEUI);
}
}
// Only two items should be updated by the delta updates
Assert.Equal(2, foundItem);
// Iot hub should never have been called.
registryManagerMock.Verify(x => x.CreateQuery(It.IsAny <string>()), Times.Once);
registryManagerMock.Verify(x => x.GetTwinAsync(It.IsAny <string>()), Times.Never);
// We expect to query for the key once (the device with an active connection)
registryManagerMock.Verify(x => x.GetDeviceAsync(It.IsAny <string>()), Times.Never);
}