public InstanceDiscoveryManager(
IHttpManager httpManager,
ITelemetryManager telemetryManager,
bool /* for test */ shouldClearCaches,
IKnownMetadataProvider knownMetadataProvider = null,
IStaticMetadataProvider staticMetadataProvider = null,
INetworkMetadataProvider networkMetadataProvider = null)
{
_httpManager = httpManager ?? throw new ArgumentNullException(nameof(httpManager));
_telemetryManager = telemetryManager ?? throw new ArgumentNullException(nameof(telemetryManager));
_knownMetadataProvider = knownMetadataProvider ?? new KnownMetadataProvider();
_staticMetadataProvider = staticMetadataProvider ?? new StaticMetadataProvider();
_networkMetadataProvider = networkMetadataProvider ?? new NetworkMetadataProvider(_httpManager, _telemetryManager);
if (shouldClearCaches)
{
_staticMetadataProvider.Clear();
}
}
public async Task NetworkProviderIsCalledLastAsync()
{
// Arrange
_staticMetadataProvider = new StaticMetadataProvider();
_discoveryManager = new InstanceDiscoveryManager(
_harness.HttpManager,
_harness.ServiceBundle.TelemetryManager,
false,
_knownMetadataProvider,
_staticMetadataProvider,
_networkMetadataProvider);
var otherEnvs = new[] { "env1", "env2" };
InstanceDiscoveryResponse discoveryResponse = new InstanceDiscoveryResponse
{
Metadata = new[] { _expectedResult }
};
var authorityUri = new Uri(Authority);
// No response from the static and known provider
_knownMetadataProvider
.GetMetadata("some_env.com", otherEnvs)
.Returns((InstanceDiscoveryMetadataEntry)null);
_networkMetadataProvider
.FetchAllDiscoveryMetadataAsync(authorityUri, _testRequestContext)
.Returns(discoveryResponse);
// Act
InstanceDiscoveryMetadataEntry actualResult = await _discoveryManager.GetMetadataEntryTryAvoidNetworkAsync(
"https://some_env.com/tid",
otherEnvs,
_testRequestContext)
.ConfigureAwait(false);
// Assert
Assert.AreSame(_expectedResult, actualResult, "The known metadata provider should be queried second");
_knownMetadataProvider.Received(1).GetMetadata("some_env.com", otherEnvs);
_ = _networkMetadataProvider.Received(1).FetchAllDiscoveryMetadataAsync(authorityUri, _testRequestContext);
}
public override void TestInitialize()
{
base.TestInitialize();
_networkMetadataProvider = Substitute.For <INetworkMetadataProvider>();
_knownMetadataProvider = Substitute.For <IKnownMetadataProvider>();
_staticMetadataProvider = Substitute.For <IStaticMetadataProvider>();
_expectedResult = new InstanceDiscoveryMetadataEntry()
{
Aliases = new[] { "some_env.com", "some_env2.com" },
PreferredCache = "env",
PreferredNetwork = "env"
};
_harness = base.CreateTestHarness();
_testRequestContext = new RequestContext(_harness.ServiceBundle, Guid.NewGuid());
_discoveryManager = new InstanceDiscoveryManager(
_harness.HttpManager,
_harness.ServiceBundle.TelemetryManager,
false,
_knownMetadataProvider,
_staticMetadataProvider,
_networkMetadataProvider);
}
