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How to use TestTracer method of httpext Package

Best K6 code snippet using httpext.TestTracer

tracer_test.go

Source:tracer_test.go

...39	"github.com/pkg/errors"40	"github.com/stretchr/testify/assert"41	"github.com/stretchr/testify/require"42)43func TestTracer(t *testing.T) {44	if runtime.GOOS == "windows" {45		t.Skip()46	}47	t.Parallel()48	srv := httptest.NewTLSServer(httpbin.New().Handler())49	defer srv.Close()50	transport, ok := srv.Client().Transport.(*http.Transport)51	assert.True(t, ok)52	transport.DialContext = netext.NewDialer(net.Dialer{}).DialContext53	var prev int6454	assertLaterOrZero := func(t *testing.T, val int64, canBeZero bool) {55		if canBeZero && val == 0 {56			return57		}58		if prev > val {59			_, file, line, _ := runtime.Caller(1)60			t.Errorf("Expected %d to be greater or equal to %d (from %s:%d)", val, prev, file, line)61			return62		}63		prev = val64	}65	for tnum, isReuse := range []bool{false, true, true} {66		t.Run(fmt.Sprintf("Test #%d", tnum), func(t *testing.T) {67			// Do not enable parallel testing, test relies on sequential execution68			tracer := &Tracer{}69			req, err := http.NewRequest("GET", srv.URL+"/get", nil)70			require.NoError(t, err)71			res, err := transport.RoundTrip(req.WithContext(httptrace.WithClientTrace(context.Background(), tracer.Trace())))72			require.NoError(t, err)73			_, err = io.Copy(ioutil.Discard, res.Body)74			assert.NoError(t, err)75			assert.NoError(t, res.Body.Close())76			trail := tracer.Done()77			trail.SaveSamples(stats.IntoSampleTags(&map[string]string{"tag": "value"}))78			samples := trail.GetSamples()79			assert.Empty(t, tracer.protoErrors)80			assertLaterOrZero(t, tracer.getConn, isReuse)81			assertLaterOrZero(t, tracer.connectStart, isReuse)82			assertLaterOrZero(t, tracer.connectDone, isReuse)83			assertLaterOrZero(t, tracer.tlsHandshakeStart, isReuse)84			assertLaterOrZero(t, tracer.tlsHandshakeDone, isReuse)85			assertLaterOrZero(t, tracer.gotConn, false)86			assertLaterOrZero(t, tracer.wroteRequest, false)87			assertLaterOrZero(t, tracer.gotFirstResponseByte, false)88			assertLaterOrZero(t, now(), false)89			assert.Equal(t, strings.TrimPrefix(srv.URL, "https://"), trail.ConnRemoteAddr.String())90			assert.Len(t, samples, 8)91			seenMetrics := map[*stats.Metric]bool{}92			for i, s := range samples {93				assert.NotContains(t, seenMetrics, s.Metric)94				seenMetrics[s.Metric] = true95				assert.False(t, s.Time.IsZero())96				assert.Equal(t, map[string]string{"tag": "value"}, s.Tags.CloneTags())97				switch s.Metric {98				case metrics.HTTPReqs:99					assert.Equal(t, 1.0, s.Value)100					assert.Equal(t, 0, i, "`HTTPReqs` is reported before the other HTTP metrics")101				case metrics.HTTPReqConnecting, metrics.HTTPReqTLSHandshaking:102					if isReuse {103						assert.Equal(t, 0.0, s.Value)104						break105					}106					fallthrough107				case metrics.HTTPReqDuration, metrics.HTTPReqBlocked, metrics.HTTPReqSending, metrics.HTTPReqWaiting, metrics.HTTPReqReceiving:108					assert.True(t, s.Value > 0.0, "%s is <= 0", s.Metric.Name)109				default:110					t.Errorf("unexpected metric: %s", s.Metric.Name)111				}112			}113		})114	}115}116type failingConn struct {117	net.Conn118}119var failOnConnWrite = false120func (c failingConn) Write(b []byte) (int, error) {121	if failOnConnWrite {122		failOnConnWrite = false123		return 0, errors.New("write error")124	}125	return c.Conn.Write(b)126}127func TestTracerNegativeHttpSendingValues(t *testing.T) {128	if runtime.GOOS == "windows" {129		t.Skip()130	}131	t.Parallel()132	srv := httptest.NewTLSServer(httpbin.New().Handler())133	defer srv.Close()134	transport, ok := srv.Client().Transport.(*http.Transport)135	assert.True(t, ok)136	dialer := &net.Dialer{}137	transport.DialContext = func(ctx context.Context, proto, addr string) (net.Conn, error) {138		conn, err := dialer.DialContext(ctx, proto, addr)139		return failingConn{conn}, err140	}141	req, err := http.NewRequest("GET", srv.URL+"/get", nil)142	require.NoError(t, err)143	{144		tracer := &Tracer{}145		res, err := transport.RoundTrip(req.WithContext(httptrace.WithClientTrace(context.Background(), tracer.Trace())))146		require.NoError(t, err)147		_, err = io.Copy(ioutil.Discard, res.Body)148		assert.NoError(t, err)149		assert.NoError(t, res.Body.Close())150		tracer.Done()151	}152	// make the next connection write fail153	failOnConnWrite = true154	{155		tracer := &Tracer{}156		res, err := transport.RoundTrip(req.WithContext(httptrace.WithClientTrace(context.Background(), tracer.Trace())))157		require.NoError(t, err)158		_, err = io.Copy(ioutil.Discard, res.Body)159		assert.NoError(t, err)160		assert.NoError(t, res.Body.Close())161		trail := tracer.Done()162		trail.SaveSamples(nil)163		require.True(t, trail.Sending > 0)164	}165}166func TestTracerError(t *testing.T) {167	t.Parallel()168	srv := httptest.NewTLSServer(httpbin.New().Handler())169	defer srv.Close()170	tracer := &Tracer{}171	req, err := http.NewRequest("GET", srv.URL+"/get", nil)172	require.NoError(t, err)173	_, err = http.DefaultTransport.RoundTrip(174		req.WithContext(175			httptrace.WithClientTrace(176				context.Background(),177				tracer.Trace())))178	assert.Error(t, err)179	assert.Len(t, tracer.protoErrors, 1)180	assert.Error(t, tracer.protoErrors[0])...

TestTracer

Using AI Code Generation

1import (2func main() {3	cfg := &config.Configuration{4		Sampler: &config.SamplerConfig{5		},6		Reporter: &config.ReporterConfig{7		},8	}9	tracer, closer := initJaeger("example")10	defer closer.Close()11	opentracing.SetGlobalTracer(tracer)12	span := opentracing.StartSpan("example-client-span")13	span.SetTag(string(ext.SpanKind), string(ext.SpanKindRPCClientEnum))14	span.SetTag("example_client_span_key", "example_client_span_value")15	span.LogFields(16		log.String("event", "soft error"),17		log.String("type", "cache timeout"),18		log.Int("waited.millis", 1500),19	span.Finish()20	span = opentracing.StartSpan("example-server-span")21	span.SetTag(string(ext.SpanKind), string(ext.SpanKindRPCServerEnum))22	span.SetTag("example_server_span_key", "example_server_span_value")23	span.LogFields(24		log.String("event", "soft error"),25		log.String("type", "cache timeout"),26		log.Int("waited.millis", 1500),27	span.Finish()28	span = opentracing.StartSpan("example-server-span")29	span.SetTag(string(ext.SpanKind), string(ext.SpanKindRPCServerEnum))30	span.SetTag("example_server_span_key", "example_server_span_value")31	span.LogFields(32		log.String("event", "soft

TestTracer

Using AI Code Generation

1import (2func main() {3	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {4		fmt.Fprintf(w, "Hello, %q", r.URL.Path)5	})6	fmt.Println("Starting server at port 8080")7	http.ListenAndServe(":8080", apmhttp.Wrap(http.DefaultServeMux))8}9import (10func main() {11	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {12		fmt.Fprintf(w, "Hello, %q", r.URL.Path)13	})14	fmt.Println("Starting server at port 8080")15	http.ListenAndServe(":8080", apmhttp.Wrap(http.DefaultServeMux))16}17import (18func main() {19	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {20		fmt.Fprintf(w, "Hello, %q", r.URL.Path)21	})22	fmt.Println("Starting server at port 8080")23	http.ListenAndServe(":8080", apmhttp.Wrap(http.DefaultServeMux))24}25import (26func main() {27	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {28		fmt.Fprintf(w, "Hello, %q", r.URL.Path)29	})30	fmt.Println("Starting server at port 8080")31	http.ListenAndServe(":8080", apmhttp.Wrap(http.DefaultServeMux))32}33import (

TestTracer

Using AI Code Generation

1import (2func main() {3    client := &http.Client{4        Transport: apmhttp.WrapRoundTripper(http.DefaultTransport),5    }6    if err != nil {7        fmt.Println("error in creating request")8    }9    resp, err := client.Do(req)10    if err != nil {11        fmt.Println("error in getting response")12    }13    fmt.Println(resp.Status)14}15import (16func main() {17    client := &http.Client{18        Transport: apmhttp.WrapRoundTripper(http.DefaultTransport),19    }20    if err != nil {21        fmt.Println("error in creating request")22    }23    resp, err := client.Do(req)24    if err != nil {25        fmt.Println("error in getting response")26    }27    fmt.Println(resp.Status)28}29import (30func main() {31    client := &http.Client{32        Transport: apmhttp.WrapRoundTripper(http.DefaultTransport),33    }34    if err != nil {35        fmt.Println("error in creating request")36    }37    resp, err := client.Do(req)38    if err != nil {39        fmt.Println("error in getting response")40    }41    fmt.Println(resp.Status)42}43import (44func main() {45    client := &http.Client{

TestTracer

Using AI Code Generation

1import (2func main() {3	sensor := instana.NewSensor("my-service")4	tracer := instahttp.NewTracer(sensor)5	client := &http.Client{6		Transport: tracer.Transport(http.DefaultTransport),7	}8	resp, err := client.Do(req)9	if err != nil {10		fmt.Println(err)11	} else {12		fmt.Println(resp.Status)13	}14}15import (16func main() {17	sensor := instana.NewSensor("my-service")18	tracer := instahttp.NewTracer(sensor)19	client := &http.Client{20		Transport: tracer.Transport(http.DefaultTransport),21	}22	resp, err := client.Do(req)23	if err != nil {24		fmt.Println(err)25	} else {26		fmt.Println(resp.Status)27	}28}29import (30func main() {31	sensor := instana.NewSensor("my-service")32	tracer := instahttp.NewTracer(sensor)33	client := &http.Client{34		Transport: tracer.Transport(http.DefaultTransport),35	}

TestTracer

Using AI Code Generation

1import (2func main() {3	tracer, err := apm.NewTracer("my-service", "1.0.0")4	if err != nil {5		panic(err)6	}7	client := &http.Client{8		Transport: apmhttp.WrapRoundTripper(http.DefaultTransport),9	}10	if err != nil {11		panic(err)12	}13	res, err := client.Do(req)14	if err != nil {15		panic(err)16	}17	fmt.Println(res.Status)18}

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