public async Task HostTests_RunsLibrary()

in src/LibraryTest/Library/HostTests.cs [18:59]

• 33 lines of code
• 1 McCabe index (conditional complexity)

        public async Task HostTests_RunsLibrary()
        {
            // ARRANGE
            var telemetryClient = Common.SetupStubTelemetryClient(out var sentItems);

            int port = Common.GetPort();

            var config = $@"<?xml version=""1.0"" encoding=""utf-8"" ?>
<Configuration>
    <Host>0.0.0.0</Host>
    <Port>{port}</Port>
    <InstrumentationKey>ikey1</InstrumentationKey>
    <LiveMetricsStreamAuthenticationApiKey></LiveMetricsStreamAuthenticationApiKey>
    <Watchlist>
        <Namespaces>default</Namespaces>
    </Watchlist>
    <AdaptiveSampling Enabled=""true"">
      <MaxEventsPerSecond>%ISTIO_MIXER_PLUGIN_AI_ADAPTIVE_SAMPLING_EVENTS_LIMIT%</MaxEventsPerSecond>
      <!--Telemetry items other than events are counted together-->
      <MaxOtherItemsPerSecond>%ISTIO_MIXER_PLUGIN_AI_ADAPTIVE_SAMPLING_LIMIT%</MaxOtherItemsPerSecond>
    </AdaptiveSampling>
</Configuration>
";

            // ACT
            Host host = new Host(telemetryClient);
            host.Run(config, TimeSpan.FromSeconds(5));

            Thread.Sleep(TimeSpan.FromMilliseconds(250));

            var request = new HandleTraceSpanRequest();
            request.Instances.Add(Common.GetStandardInstanceMsg());

            var writer = new GrpcWriter(port);
            await writer.Write(request).ConfigureAwait(false);
            
            Common.AssertIsTrueEventually(() => sentItems.Count == 2);

            // ASSERT
            Assert.AreEqual("source-1", (sentItems.Skip(0).First() as DependencyTelemetry).Context.Cloud.RoleInstance);
            Assert.AreEqual("destination-1", (sentItems.Skip(1).First() as RequestTelemetry).Context.Cloud.RoleInstance);
        }