public async Task TraceSingleAsync(Func <IHostBuilder> createHostBuilder)
{
IHost host = null;
try
{
host = createHostBuilder().Build();
await host.StartAsync();
ITraceContext traceContext = new SimpleTraceContext(null, null, true);
var tracerFactory = host.Services.GetRequiredService <Func <ITraceContext, IManagedTracer> >();
IManagedTracer tracer = tracerFactory(traceContext);
ContextTracerManager.SetCurrentTracer(tracer);
using (tracer.StartSpan(_testId))
{
IManagedTracer currentTracer = host.Services.GetRequiredService <IManagedTracer>();
currentTracer.RunInSpan(
() => Console.WriteLine("Using Cloud Trace from a non ASP.NET Core app"),
"testing_tracing");
}
var trace = TraceEntryPolling.Default.GetTrace(_testId, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, _testId, "testing_tracing");
}
finally
{
if (host is object)
{
await host.StopAsync();
}
}
}
public async Task TraceOutGoing()
{
string googleUri = "https://google.com/";
var spanName = EntryData.GetMessage(nameof(TraceOutGoing), _testId);
await TraceOutGoingRequest(spanName, googleUri, false);
var trace = TraceEntryPolling.Default.GetTrace(spanName, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, spanName, googleUri);
TraceEntryVerifiers.AssertSpanLabelsExact(
trace.Spans.First(s => s.Name == googleUri), TraceEntryData.HttpGetSuccessLabels);
}
public async Task TraceOutGoing_HttpError()
{
string fakeUri = "https://google.com/404";
var spanName = EntryData.GetMessage(nameof(TraceOutGoing_HttpError), _testId);
await TraceOutGoingRequest(spanName, fakeUri, false);
var trace = TraceEntryPolling.Default.GetTrace(spanName, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, spanName, fakeUri);
TraceEntryVerifiers.AssertSpanLabelsExact(trace.Spans.Where(s => s.Name == fakeUri).Single(),
new Dictionary <string, string>
{
{ TraceLabels.HttpMethod, "GET" },
{ TraceLabels.HttpStatusCode, "404" }
});
}
public async Task TraceOutGoing_Exception()
{
string fakeUri = "http://www.thiscannotpossiblyexist934719238.com/";
var spanName = EntryData.GetMessage(nameof(TraceOutGoing_Exception), _testId);
await TraceOutGoingRequest(spanName, fakeUri, true);
var trace = TraceEntryPolling.Default.GetTrace(spanName, _startTime);
TraceEntryVerifiers.AssertParentChildSpan(trace, spanName, fakeUri);
var span = trace.Spans.Where(s => s.Name == fakeUri).Single();
TraceEntryVerifiers.AssertSpanLabelsContains(span,
new Dictionary <string, string>
{
{ TraceLabels.HttpMethod, "GET" },
});
TraceEntryVerifiers.AssertContainsStackTrace(span);
}
