How to use getTestTracer method of httpext Package

Best K6 code snippet using httpext.getTestTracer

tracer_test.go

Source:tracer_test.go

...41	"go.k6.io/k6/lib/types"42	"go.k6.io/k6/metrics"43)44const traceDelay = 100 * time.Millisecond45func getTestTracer(t *testing.T) (*Tracer, *httptrace.ClientTrace) {46	tracer := &Tracer{}47	ct := tracer.Trace()48	if runtime.GOOS == "windows" {49		// HACK: Time resolution is not as accurate on Windows, see:50		//  https://github.com/golang/go/issues/868751		//  https://github.com/golang/go/issues/4108752		// Which seems to be causing some metrics to have a value of 0,53		// since e.g. ConnectStart and ConnectDone could register the same time.54		// So we force delays in the ClientTrace event handlers55		// to hopefully reduce the chances of this happening.56		ct = &httptrace.ClientTrace{57			ConnectStart: func(a, n string) {58				t.Logf("called ConnectStart at\t\t%v\n", now())59				time.Sleep(traceDelay)60				tracer.ConnectStart(a, n)61			},62			ConnectDone: func(a, n string, e error) {63				t.Logf("called ConnectDone at\t\t%v\n", now())64				time.Sleep(traceDelay)65				tracer.ConnectDone(a, n, e)66			},67			GetConn: func(h string) {68				t.Logf("called GetConn at\t\t%v\n", now())69				time.Sleep(traceDelay)70				tracer.GetConn(h)71			},72			GotConn: func(i httptrace.GotConnInfo) {73				t.Logf("called GotConn at\t\t%v\n", now())74				time.Sleep(traceDelay)75				tracer.GotConn(i)76			},77			TLSHandshakeStart: func() {78				t.Logf("called TLSHandshakeStart at\t\t%v\n", now())79				time.Sleep(traceDelay)80				tracer.TLSHandshakeStart()81			},82			TLSHandshakeDone: func(s tls.ConnectionState, e error) {83				t.Logf("called TLSHandshakeDone at\t\t%v\n", now())84				time.Sleep(traceDelay)85				tracer.TLSHandshakeDone(s, e)86			},87			WroteRequest: func(i httptrace.WroteRequestInfo) {88				t.Logf("called WroteRequest at\t\t%v\n", now())89				time.Sleep(traceDelay)90				tracer.WroteRequest(i)91			},92			GotFirstResponseByte: func() {93				t.Logf("called GotFirstResponseByte at\t%v\n", now())94				time.Sleep(traceDelay)95				tracer.GotFirstResponseByte()96			},97		}98	}99	return tracer, ct100}101func TestTracer(t *testing.T) { //nolint:tparallel102	t.Parallel()103	srv := httptest.NewTLSServer(httpbin.New().Handler())104	defer srv.Close()105	transport, ok := srv.Client().Transport.(*http.Transport)106	assert.True(t, ok)107	transport.DialContext = netext.NewDialer(108		net.Dialer{},109		netext.NewResolver(net.LookupIP, 0, types.DNSfirst, types.DNSpreferIPv4),110	).DialContext111	var prev int64112	assertLaterOrZero := func(t *testing.T, val int64, canBeZero bool) {113		if canBeZero && val == 0 {114			return115		}116		if prev > val {117			_, file, line, _ := runtime.Caller(1)118			t.Errorf("Expected %d to be greater or equal to %d (from %s:%d)", val, prev, file, line)119			return120		}121		prev = val122	}123	builtinMetrics := metrics.RegisterBuiltinMetrics(metrics.NewRegistry())124	for tnum, isReuse := range []bool{false, true, true} { //nolint:paralleltest125		t.Run(fmt.Sprintf("Test #%d", tnum), func(t *testing.T) {126			// Do not enable parallel testing, test relies on sequential execution127			req, err := http.NewRequest("GET", srv.URL+"/get", nil)128			require.NoError(t, err)129			tracer, ct := getTestTracer(t)130			res, err := transport.RoundTrip(req.WithContext(httptrace.WithClientTrace(context.Background(), ct)))131			require.NoError(t, err)132			_, err = io.Copy(ioutil.Discard, res.Body)133			assert.NoError(t, err)134			assert.NoError(t, res.Body.Close())135			if runtime.GOOS == "windows" {136				time.Sleep(traceDelay)137			}138			trail := tracer.Done()139			trail.SaveSamples(builtinMetrics, metrics.IntoSampleTags(&map[string]string{"tag": "value"}))140			samples := trail.GetSamples()141			assertLaterOrZero(t, tracer.getConn, isReuse)142			assertLaterOrZero(t, tracer.connectStart, isReuse)143			assertLaterOrZero(t, tracer.connectDone, isReuse)...

getTestTracer

Using AI Code Generation

1import (2func getTestTracer() *tracer.Tracer {3	tracer := tracer.NewTracer()4	tracer.SetDefaultServiceInfo("my-gorilla-app", "web", ext.AppTypeWeb)5}6func TestTracer(t *testing.T) {7	tracer := getTestTracer()8	defer tracer.Stop()9	mux := mux.NewRouter()10	mux.HandleFunc("/hello", func(w http.ResponseWriter, r *http.Request) {11		w.Write([]byte("Hello, world!"))12	})13	ts := httptest.NewServer(mux)14	defer ts.Close()15	req, err := http.NewRequest("GET", ts.URL+"/hello", nil)16	if err != nil {17		t.Fatal(err)18	}19	resp, err := http.DefaultClient.Do(req)20	if err != nil {21		t.Fatal(err)22	}23	defer resp.Body.Close()24	traces := tracer.Traces()25	if len(traces) != 1 {26		t.Fatalf("expected 1 trace, got %d", len(traces))27	}28	if span.Service != "my-gorilla-app" {29		t.Errorf("expected service my-gorilla-app, got %s", span.Service)30	}31	if span.Name != "gorilla.request" {32		t.Errorf("expected operation gorilla.request, got %s", span.Name)33	}34	if span.Resource != "GET /hello" {35		t.Errorf("expected resource GET /hello, got %s", span.Resource)36	}37	if span.GetTag(ext.HTTPCode) != "200" {38		t.Errorf("expected HTTP code 200, got %s", span.GetTag(ext.HTTPCode))39	}40	if span.GetTag(ext.HTTPMethod) != "GET" {41		t.Errorf("expected HTTP method GET, got %s", span.GetTag(ext.HTTPMethod))42	}43	if span.GetTag(ext.HTTPURL) != "/hello" {44		t.Errorf("expected HTTP URL /hello, got %s", span.GetTag(ext.HTTPURL))45	}46}47func main() {48	fmt.Println("Hello, World!")49}

getTestTracer

Using AI Code Generation

1import (2func main() {3	tracer := getTestTracer()4	defer tracer.Stop()5	if err != nil {6		fmt.Printf("error: %v7		os.Exit(1)8	}9	span := tracer.NewRootSpan("http.request", "web", "my-host")10	span.SetMeta(ext.HTTPMethod, "GET")11	httpext.Inject(span.Context(), req)12	client := &http.Client{}13	res, err := client.Do(req)14	if err != nil {15		fmt.Printf("error: %v16		os.Exit(1)17	}18	defer res.Body.Close()19	span.Finish()20}21func getTestTracer() *tracer.Tracer {22	tracer := tracer.NewTracer()23}

getTestTracer

Using AI Code Generation

1import (2func main() {3    sensor := instana.NewSensor("my-service")4    defer sensor.Close()5    httpext.GetTestTracer(sensor)6    instahttprouter.GetTestTracer(sensor)7    instamux.GetTestTracer(sensor)8    instarouter.GetTestTracer(sensor)

getTestTracer

Using AI Code Generation

1import (2func main() {3	router := mux.NewRouter()4	tracer, closer := Init("main")5	defer closer.Close()6	opentracing.SetGlobalTracer(tracer)7	router.Use(gorillamux.Middleware(tracer))8	router.HandleFunc("/test", func(writer http.ResponseWriter, request *http.Request) {9		span := opentracing.StartSpan("test", opentracing.ChildOf(request.Context()))10		defer span.Finish()11		fmt.Fprintln(writer, "test")12	}).Methods("GET")13	log.Fatal(http.ListenAndServe(":8080", router))14}15func Init(service string) (opentracing.Tracer, io.Closer) {16	cfg := &config.Configuration{17		Sampler: &config.SamplerConfig{18		},19		Reporter: &config.ReporterConfig{20		},21	}22	tracer, closer, err := cfg.New(service, config.Logger(jaeger.StdLogger), config.Metrics(metrics.NullFactory))23	if err != nil {24		log.Panicf("Could not initialize jaeger tracer: %s", err.Error())25	}26}27import (

getTestTracer

Using AI Code Generation

1import (2func main() {3    t := tracer.NewTracer()4    defer t.Stop()5    span := t.NewRootSpan("web.request", "web", "/")6    span.SetMeta("http.method", "GET")7    span.SetMeta("http.url", "/")8    span.SetMeta("http.status_code", "200")9    span.SetMeta("http.content_type", "text/html")10    span.SetMeta("http.content_length", "1234")11    span.SetMetric("http.request.size", 1234)12    span.SetMetric("http.response.size", 1234)13    span.Finish()14    if err != nil {15        panic(err)16    }17    t.TraceRequest(span, req)18    client := &http.Client{}19    resp, err := client.Do(req)20    if err != nil {21        panic(err)22    }23    defer resp.Body.Close()24    span.Finish()25}26import (27func main() {28    t := tracer.NewTracer()29    defer t.Stop()30    span := t.NewRootSpan("web.request", "web", "/")31    span.SetMeta("http.method", "GET")32    span.SetMeta("http.url", "/")33    span.SetMeta("http.status_code", "200")34    span.SetMeta("http.content_type", "text/html")35    span.SetMeta("http.content_length", "1234")36    span.SetMetric("http.request.size", 1234)37    span.SetMetric("http.response.size", 1234)

getTestTracer

Using AI Code Generation

1import (2func main() {3	sensor := instana.NewSensor("test")4	defer sensor.Close()5	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {6		fmt.Fprintf(w, "Hello, %q", r.URL.Path)7	})8	http.ListenAndServe(":8080", instahttp.WrapMux(sensor, http.DefaultServeMux))9}10import (11func main() {12	sensor := instana.NewSensor("test")13	defer sensor.Close()14	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {15		fmt.Fprintf(w, "Hello, %q", r.URL.Path)16	})17	http.ListenAndServe(":8080", instahttp.WrapHandler(sensor, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {18		fmt.Fprintf(w, "Hello, %q", r.URL.Path)19	})))20}21import (22func main() {23	sensor := instana.NewSensor("test")24	defer sensor.Close()25	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {26		fmt.Fprintf(w, "Hello, %q", r.URL.Path)27	})28	http.ListenAndServe(":8080", instahttp.WrapHandlerFunc(sensor, func(w http.ResponseWriter, r *http.Request) {29		fmt.Fprintf(w, "Hello, %q", r.URL.Path)30	}))31}32import (33func main() {34	sensor := instana.NewSensor("test")

getTestTracer

Using AI Code Generation

1import (2func getTestTracer() *tracer.Tracer {3	return tracer.NewTracer()4}5func TestGet(t *testing.T) {6	tracer := getTestTracer()7	defer tracer.Stop()8	mux := http.NewServeMux()9	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {10		fmt.Fprintf(w, "Hello, %s!", r.URL.Path[1:])11	})12	ts := httptest.NewServer(mux)13	defer ts.Close()14	req, err := http.NewRequest("GET", ts.URL, nil)15	if err != nil {16		t.Fatal(err)17	}18	span := tracer.NewChildSpanFromContext("parent.request", nil)19	defer span.Finish()20	if err := httpext.Inject(span.Context(), req); err != nil {21		t.Fatal(err)22	}23	client := nethttp.WrapClient(http.DefaultClient)24	resp, err := client.Do(req)25	if err != nil {26		t.Fatal(err)27	}28	defer resp.Body.Close()29	if got, want := resp.StatusCode, 200; got != want {30		t.Errorf("got %d, want %d", got, want)31	}32}33import (

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