public async void TestHttpClient()
{
var tracer = new DefaultTracer();
var http = tracer.CreateHttpClient();
http.DefaultRequestHeaders.UserAgent.ParseAdd("tracer_test v1.3");
await http.GetStringAsync("https://newlifex.com?id=1234");
await Assert.ThrowsAnyAsync <Exception>(async() =>
{
// 故意写错地址，让它抛出异常
await http.GetStringAsync("https://www.newlifexxx.com/notfound?name=stone");
});
// 取出全部跟踪数据
var bs = tracer.TakeAll();
var keys = bs.Select(e => e.Name).ToArray();
Assert.Equal(2, bs.Length);
Assert.Contains("https://newlifex.com/", keys);
Assert.Contains("https://www.newlifexxx.com/notfound", keys);
// 其中一项
var builder = bs.FirstOrDefault(e => e.Name == "https://www.newlifexxx.com/notfound");
Assert.Equal(1, builder.Total);
Assert.Equal(1, builder.Errors);
var span = builder.ErrorSamples[0];
//Assert.Equal("tracer_test v1.3", span.Tag);
Assert.Equal("/notfound?name=stone", span.Tag);
}
