public void ConfigurationTests_EnvironmentVariablesAreResolved()

in src/LibraryTest/Library/ConfigurationTests.cs [63:106]
39 lines of code
1 McCabe index (conditional complexity)

        public void ConfigurationTests_EnvironmentVariablesAreResolved()
        {
            // ARRANGE
            var config = $@"<?xml version=""1.0"" encoding=""utf-8"" ?>
<Configuration>
    <Host>%Input_Host%</Host>
    <Port>%Input_Port%</Port>
    <InstrumentationKey>%ConfigTestInstrumentationKey%</InstrumentationKey>
    <LiveMetricsStreamAuthenticationApiKey></LiveMetricsStreamAuthenticationApiKey>
    <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>
    <Endpoints>
        <TelemetryChannelEndpoint>%TelemetryChannelEndpoint%</TelemetryChannelEndpoint>
        <QuickPulseServiceEndpoint>%QuickPulseEndpoint%</QuickPulseServiceEndpoint>
    </Endpoints>
</Configuration>
";

            var rand = new Random();
            string host = Guid.NewGuid().ToString();
            string port = rand.Next().ToString();
            string ikey = Guid.NewGuid().ToString();
            string telemetryChannelEndpoint = Guid.NewGuid().ToString();
            string quickPulseEndpoint = Guid.NewGuid().ToString();

            Environment.SetEnvironmentVariable("Input_Host", host);
            Environment.SetEnvironmentVariable("Input_Port", port);
            Environment.SetEnvironmentVariable("ConfigTestInstrumentationKey", ikey);
            Environment.SetEnvironmentVariable("TelemetryChannelEndpoint", telemetryChannelEndpoint);
            Environment.SetEnvironmentVariable("QuickPulseEndpoint", quickPulseEndpoint);

            // ACT
            var configuration = new Configuration(config);

            // ASSERT
            Assert.AreEqual(host, configuration.Host);
            Assert.AreEqual(port, configuration.Port.ToString());
            Assert.AreEqual(ikey, configuration.InstrumentationKey);
            Assert.AreEqual(telemetryChannelEndpoint, configuration.Endpoints_TelemetryChannelEndpoint);
            Assert.AreEqual(quickPulseEndpoint, configuration.Endpoints_QuickPulseServiceEndpoint);
        }