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How to use CalculateMetrics method of common Package

Best Testkube code snippet using common.CalculateMetrics

util.go

Source:util.go

...73	EventTimeNS int6474	// Time (in ns) that the event was received by the app.75	RecvTimeNS int64 `json:"receiveTimeNs"`76}77// CalculateMetrics calculates mean, median, std dev, max and min for the given78// input events. The function getValue should return the value of the element79// corresponding to the given index.80func CalculateMetrics(events []InputEvent, getValue func(int) float64) (mean, median, stdDev, max, min float64) {81	n := len(events)82	sort.Slice(events, func(i, j int) bool { return getValue(i) < getValue(j) })83	min = getValue(0)84	max = getValue(n - 1)85	median = getValue(n / 2)86	sum := 0.87	for i := range events {88		sum += getValue(i)89	}90	mean = sum / float64(n)91	stdSum := 0.92	for i := range events {93		stdSum += math.Pow(getValue(i)-mean, 2)94	}95	stdDev = math.Sqrt(stdSum / float64(n))96	return97}98// WaitForEvents polls until the counter in the app UI is equal to count, then99// returns the input events from the helper app.100func WaitForEvents(ctx context.Context, d *ui.Device, count int) (string, error) {101	if err := testing.Poll(ctx, func(ctx context.Context) error {102		v := d.Object(ui.ID("org.chromium.arc.testapp.inputlatency:id/event_count"))103		txt, err := v.GetText(ctx)104		if err != nil {105			return err106		}107		num, err := strconv.ParseInt(txt, 10, 64)108		if err != nil {109			return err110		}111		if num != int64(count) {112			return errors.Errorf("unexpected event count; got %d, want %d", num, count)113		}114		return nil115	}, nil); err != nil {116		return "", err117	}118	// Press ESC key to finish event trace and generate JSON data.119	if err := d.PressKeyCode(ctx, ui.KEYCODE_ESCAPE, 0x0); err != nil {120		return "", err121	}122	var txt string123	if err := testing.Poll(ctx, func(ctx context.Context) error {124		v := d.Object(ui.ID("org.chromium.arc.testapp.inputlatency:id/event_json"))125		var err error126		txt, err = v.GetText(ctx)127		if err != nil {128			return err129		}130		if txt == "" {131			return errors.New("waiting for generate JSON data")132		}133		return nil134	}, nil); err != nil {135		return "", err136	}137	return txt, nil138}139// WaitForClearUI clears the event data in ArcInputLatencyTest.apk to get ready for next event tracing.140func WaitForClearUI(ctx context.Context, d *ui.Device) error {141	if err := d.PressKeyCode(ctx, ui.KEYCODE_DEL, 0x0); err != nil {142		return err143	}144	// Check whether events are cleared.145	if err := testing.Poll(ctx, func(ctx context.Context) error {146		v := d.Object(ui.ID("org.chromium.arc.testapp.inputlatency:id/event_count"))147		txt, err := v.GetText(ctx)148		if err != nil {149			return err150		}151		num, err := strconv.ParseInt(txt, 10, 64)152		if err != nil {153			return err154		}155		if num != 0 {156			return errors.Errorf("failed to clean events; got %d, want 0", num)157		}158		return nil159	}, nil); err != nil {160		return err161	}162	return nil163}164// EvaluateLatency gets event data, calculates the latency, and adds the result to performance metrics.165func EvaluateLatency(ctx context.Context, s *testing.State, d *ui.Device,166	numEvents int, eventTimes []int64, perfName string, pv *perf.Values) error {167	s.Log("Collecting results")168	txt, err := WaitForEvents(ctx, d, numEvents)169	if err != nil {170		return errors.Wrap(err, "unable to wait for events")171	}172	var events []InputEvent173	if err := json.Unmarshal([]byte(txt), &events); err != nil {174		return errors.Wrap(err, "could not ummarshal events from app")175	}176	// Assign event RTC time.177	for i := range events {178		events[i].EventTimeNS = eventTimes[i]179	}180	mean, median, stdDev, max, min := CalculateMetrics(events, func(i int) float64 {181		return float64(events[i].RecvTimeNS-events[i].EventTimeNS) / 1000000.182	})183	s.Logf("Latency (ms): mean %f median %f std %f max %f min %f", mean, median, stdDev, max, min)184	pv.Set(perf.Metric{185		Name:      perfName,186		Unit:      "milliseconds",187		Direction: perf.SmallerIsBetter,188	}, mean)189	return nil190}191// Now returns the current time in nanoseconds from CLOCK_BOOTTIME.192func Now() (int64, error) {193	var ts unix.Timespec194	if err := unix.ClockGettime(unix.CLOCK_BOOTTIME, &ts); err != nil {...

http.go

Source:http.go

...27}28func NewReceiver(trackers ...tracker.Tracker) *Receiver {29	for _, tmp := range trackers {30		go func(t tracker.Tracker) {31			t.CalculateMetrics()32			ticker := time.NewTicker(15 * time.Second)33			for {34				select {35				case <-ticker.C:36					t.CalculateMetrics()37				}38			}39		}(tmp)40	}41	return &Receiver{42		trackers: trackers,43	}44}45func (rcv *Receiver) ServeHTTP(w http.ResponseWriter, r *http.Request) {46	ts := getTimeseries(w, r)47	if len(ts) == 0 {48		return49	}50	rcv.updateMaxTimestamp(ts)...

common.go

Source:common.go

...4)5const MetricNs = "prom_count"6type Tracker interface {7	Observe(metrics []model.Metric) error8	CalculateMetrics()9}...

CalculateMetrics

Using AI Code Generation

1import (2func main() {3    fmt.Println(stringutil.Reverse("!oG ,olleH"))4    fmt.Println(stringutil.MyName)5    fmt.Println(stringutil.CalculateMetrics())6}7{5 8}

CalculateMetrics

Using AI Code Generation

1import (2func main() {3    m := metrics.CalculateMetrics{}4    m.SetData(10, 20)5    fmt.Println(m.Add())6    fmt.Println(m.Subtract())7    fmt.Println(m.Multiply())8    fmt.Println(m.Divide())9}10In the above example, we have created a package called metrics and then we have created a file called common.go in that package. In the common.go file, we have defined a struct called CalculateMetrics and then we have defined four methods Add, Subtract, Multiply, and Divide. In the main.go file, we have imported the metrics package

CalculateMetrics

Using AI Code Generation

1import (2func main() {3	m.CalculateMetrics(10, 20)4	fmt.Println(m)5}6{10 20 30 300}7import (8func main() {9	m.CalculateMetrics(10, 20)10	fmt.Println(m)11	m.CalculateMetrics1(10, 20)12}13{10 20 30 300}14main.main()15import (16func main() {17	m.CalculateMetrics(10, 20)18	fmt.Println(m)19	m.CalculateMetrics1(10, 20)20}21{10 20 30 300}22main.main()23import (

CalculateMetrics

Using AI Code Generation

1import (2func main() {3    fmt.Println(common.CalculateMetrics(10, 20))4}5import (6func main() {7    fmt.Println(common.CalculateMetrics(10, 20))8}

CalculateMetrics

Using AI Code Generation

1import (2func main() {3    common.CalculateMetrics()4    other.CalculateMetrics()5    fmt.Println("Hello, playground")6}7import (8func main() {9    common.CalculateMetrics()10    other.CalculateMetrics()11    fmt.Println("Hello, playground")12}

CalculateMetrics

Using AI Code Generation

1import (2func main() {3    common.CalculateMetrics()4    fmt.Println("Hello World")5}6import "fmt"7func main() {8    fmt.Println(name)9}

CalculateMetrics

Using AI Code Generation

1import (2func main() {3	metrics := common.CalculateMetrics(10, 20, 30)4	fmt.Println(metrics)5}6import (7func main() {8	common.CalculateMetrics(10, 20, 30)9}10&{10 20 30 60 20}11&{10 20 30 60 20}12{10 20 30 60 20}

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