public async Task When_Disposed_While_Refreshing_We_Shutdown_Gracefully()
{
using var cache = new TestDeviceCache(this.quickRefreshOptions, true);
var deviceMock = CreateMockDevice();
deviceMock.Setup(x => x.InitializeAsync(It.IsAny <NetworkServerConfiguration>(), It.IsAny <CancellationToken>()))
.ReturnsAsync((NetworkServerConfiguration config, CancellationToken token) =>
{
token.WaitHandle.WaitOne();
throw new LoRaProcessingException("Refresh failed.", LoRaProcessingErrorCode.DeviceInitializationFailed);
});
var device = deviceMock.Object;
cache.Register(device);
while (!deviceMock.Invocations.Any(x => x.Method.Name == nameof(LoRaDevice.InitializeAsync)))
{
await Task.Delay(5);
}
cache.Dispose();
var count = cache.DeviceRefreshCount;
await Task.Delay(this.quickRefreshOptions.ValidationInterval * 2);
Assert.Equal(count, cache.DeviceRefreshCount);
}
public async Task When_Device_Is_Fresh_No_Refresh_Is_Triggered()
{
using var cache = new TestDeviceCache(this.quickRefreshOptions);
using var device = CreateTestDevice();
device.LastUpdate = DateTime.UtcNow + TimeSpan.FromMinutes(1);
cache.Register(device);
using var cts = new CancellationTokenSource(this.quickRefreshOptions.ValidationInterval * 2);
await Assert.ThrowsAsync <OperationCanceledException>(() => cache.WaitForRefreshAsync(cts.Token));
}
public async Task When_Refresh_Fails_It_Is_Retried()
{
using var cache = new TestDeviceCache(this.quickRefreshOptions, true);
var deviceMock = CreateMockDevice();
deviceMock.SetupSequence(x => x.InitializeAsync(It.IsAny <NetworkServerConfiguration>(), It.IsAny <CancellationToken>()))
.ThrowsAsync(new LoRaProcessingException("Refresh failed.", LoRaProcessingErrorCode.DeviceInitializationFailed))
.ReturnsAsync(true);
var device = deviceMock.Object;
cache.Register(device);
await cache.WaitForRefreshCallsAsync(3);
deviceMock.Verify(x => x.InitializeAsync(It.IsAny <NetworkServerConfiguration>(), It.IsAny <CancellationToken>()), Times.AtLeast(2));
}
public void Mic_Validation_Is_Used_To_Validate_Items(bool isValid)
{
using var device = CreateTestDevice();
using var cache = new TestDeviceCache(this.noRefreshOptions, (_, _) => isValid);
cache.Register(device);
var payload = new LoRaPayloadData(device.DevAddr.Value, new MacHeader(MacMessageType.UnconfirmedDataUp),
FrameControlFlags.None, 1, string.Empty, "payload", FramePort.AppMin,
mic: null, NullLogger.Instance);
Assert.Equal(isValid, cache.TryGetForPayload(payload, out _));
var stats = cache.CalculateStatistics();
Assert.Equal(isValid ? 1 : 0, stats.Hit);
Assert.Equal(isValid ? 0 : 1, stats.Miss);
}
public async Task When_Device_Expires_It_Is_Refreshed()
{
var moqCallback = new Mock <Action <LoRaDevice> >();
using var cache = new TestDeviceCache(moqCallback.Object, this.quickRefreshOptions, true);
var deviceMock = CreateMockDevice();
var disposableMock = new Mock <IDisposable>();
deviceMock.Setup(x => x.BeginDeviceClientConnectionActivity())
.Returns(disposableMock.Object);
var device = deviceMock.Object;
cache.Register(device);
await cache.WaitForRefreshAsync(CancellationToken.None);
moqCallback.Verify(x => x.Invoke(device));
disposableMock.Verify(x => x.Dispose(), Times.Once);
}
public async Task When_Device_Inactive_It_Is_Removed()
{
var options = this.quickRefreshOptions with
{
MaxUnobservedLifetime = TimeSpan.FromMilliseconds(1)
};
using var cache = new TestDeviceCache(options);
var connectionManager = new Mock <ILoRaDeviceClientConnectionManager>();
using var device = new LoRaDevice(new DevAddr(0xabc), new DevEui(0x123), connectionManager.Object)
{
LastSeen = DateTime.UtcNow
};
cache.Register(device);
using var cts = new CancellationTokenSource(this.quickRefreshOptions.ValidationInterval * 2);
await cache.WaitForRemoveAsync(cts.Token);
Assert.False(cache.TryGetByDevEui(device.DevEUI, out _));
connectionManager.Verify(x => x.Release(device), Times.Once);
}
public void Last_Seen_Is_Updated_Depending_On_Cache_Hit(bool cacheHit)
{
using var device = CreateTestDevice();
using var cache = new TestDeviceCache(this.noRefreshOptions, (_, _) => cacheHit);
cache.Register(device);
var payload = new LoRaPayloadData(device.DevAddr.Value, new MacHeader(MacMessageType.UnconfirmedDataUp),
FrameControlFlags.None, 1, string.Empty, "payload", FramePort.AppMin,
mic: null, NullLogger.Instance);
var lastSeen = device.LastSeen;
cache.TryGetForPayload(payload, out _);
if (cacheHit)
{
Assert.True(device.LastSeen > lastSeen);
}
else
{
Assert.Equal(device.LastSeen, lastSeen);
}
}