public async Task Trace_Exception()
{
string testId = Utils.GetTestId();
var startTime = Timestamp.FromDateTime(DateTime.UtcNow);
var builder = new WebHostBuilder().UseStartup <TraceTestNoBufferHighQpsApplication>();
using (var server = new TestServer(builder))
{
var client = server.CreateClient();
try
{
await client.GetAsync($"/Trace/ThrowException/{testId}");
}
catch
{
// This will throw as the task faults.
}
}
var spanName = TraceController.GetMessage(nameof(TraceController.ThrowException), testId);
var trace = await GetTrace(spanName, startTime);
Assert.NotNull(trace);
var span = trace.Spans.First(s => s.Name.StartsWith("/Trace/ThrowException"));
Assert.NotEmpty(span.Labels);
Assert.Contains(nameof(TraceController), span.Labels[Common.Labels.StackTrace]);
Assert.Contains(nameof(TraceController.ThrowException), span.Labels[Common.Labels.StackTrace]);
}
public async Task Trace_Buffer()
{
string testId = Utils.GetTestId();
var startTime = Timestamp.FromDateTime(DateTime.UtcNow);
var spanName = TraceController.GetMessage(nameof(TraceController.Trace), testId);
var builder = new WebHostBuilder().UseStartup <TraceTestBufferHighQpsApplication>();
using (var server = new TestServer(builder))
{
var client = server.CreateClient();
// Make a trace with a small span that will not cause the buffer to flush.
await client.GetAsync($"/Trace/Trace/{testId}");
Assert.Null(await GetTrace(spanName, startTime, expectTrace: false));
// Make a large trace that will flush the buffer.
await client.GetAsync($"/Trace/TraceStackTrace/{testId}");
}
var spanNameStack = TraceController.GetMessage(nameof(TraceController.TraceStackTrace), testId);
Assert.NotNull(await GetTrace(spanName, startTime));
Assert.NotNull(await GetTrace(spanNameStack, startTime));
}
public async Task Trace_Header()
{
string traceId = TraceIdFactory.Create().NextId();
ulong spanId = SpanIdFactory.Create().NextId();
string testId = Utils.GetTestId();
var startTime = Timestamp.FromDateTime(DateTime.UtcNow);
var builder = new WebHostBuilder().UseStartup <TraceTestNoBufferLowQpsApplication>();
using (var server = new TestServer(builder))
{
var client = server.CreateClient();
var header = TraceHeaderContext.Create(traceId, spanId, shouldTrace: true);
client.DefaultRequestHeaders.Add(TraceHeaderContext.TraceHeader, header.ToString());
await client.GetAsync($"/Trace/Trace/{testId}");
}
var spanName = TraceController.GetMessage(nameof(TraceController.Trace), testId);
var trace = await GetTrace(spanName, startTime);
Assert.NotNull(trace);
Assert.Equal(traceId, trace.TraceId);
Assert.Equal(2, trace.Spans.Count);
var span = trace.Spans.First(s => s.Name.StartsWith("/Trace"));
Assert.Equal(spanId, span.ParentSpanId);
}
public async Task Trace_QPS()
{
string testId = Utils.GetTestId();
var startTime = Timestamp.FromDateTime(DateTime.UtcNow);
var builder = new WebHostBuilder().UseStartup <TraceTestNoBufferApplication>();
using (var server = new TestServer(builder))
{
var client = server.CreateClient();
// The first request is not traced, sleep long enough
// for the rate limiter to allow a request, then the second
// request is traced.
await client.GetAsync($"/Trace/TraceLabels/{testId}");
Thread.Sleep(TimeSpan.FromSeconds(2));
await client.GetAsync($"/Trace/Trace/{testId}");
}
var spanNameTrace = TraceController.GetMessage(nameof(TraceController.Trace), testId);
var spanNameLabels = TraceController.GetMessage(nameof(TraceController.TraceLabels), testId);
Assert.Null(await GetTrace(spanNameLabels, startTime, expectTrace: false));
Assert.NotNull(await GetTrace(spanNameTrace, startTime));
}
public async Task Trace_Label()
{
string testId = Utils.GetTestId();
var startTime = Timestamp.FromDateTime(DateTime.UtcNow);
var builder = new WebHostBuilder().UseStartup <TraceTestNoBufferHighQpsApplication>();
using (var server = new TestServer(builder))
{
var client = server.CreateClient();
await client.GetAsync($"/Trace/TraceLabels/{testId}");
}
var spanName = TraceController.GetMessage(nameof(TraceController.TraceLabels), testId);
var trace = await GetTrace(spanName, startTime);
Assert.NotNull(trace);
Assert.Equal(2, trace.Spans.Count);
var span = trace.Spans.First(s => s.Name.StartsWith("Trace"));
Assert.Single(span.Labels);
Assert.Equal(span.Labels[TraceController.Label], TraceController.LabelValue);
}