blob: 1656e5603c51e99bd9b9441bbb5913ace59f1ad6 [file] [log] [blame]
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build !disable_events
package event_test
import (
"context"
"os"
"strings"
"testing"
"time"
"golang.org/x/exp/event"
"golang.org/x/exp/event/adapter/eventtest"
"golang.org/x/exp/event/adapter/logfmt"
"golang.org/x/exp/event/keys"
)
var (
l1 = keys.Int("l1").Of(1)
l2 = keys.Int("l2").Of(2)
l3 = keys.Int("l3").Of(3)
counter = event.NewCounter("hits")
gauge = event.NewFloatGauge("temperature")
latency = event.NewDuration("latency")
)
func TestPrint(t *testing.T) {
ctx := context.Background()
for _, test := range []struct {
name string
events func(context.Context)
expect string
}{{
name: "simple",
events: func(ctx context.Context) { event.To(ctx).Log("a message") },
expect: `time=2020-03-05T14:27:48 msg="a message"
`}, {
name: "log 1",
events: func(ctx context.Context) { event.To(ctx).With(l1).Log("a message") },
expect: `time=2020-03-05T14:27:48 l1=1 msg="a message"`,
}, {
name: "log 2",
events: func(ctx context.Context) { event.To(ctx).With(l1).With(l2).Log("a message") },
expect: `time=2020-03-05T14:27:48 l1=1 l2=2 msg="a message"`,
}, {
name: "log 3",
events: func(ctx context.Context) { event.To(ctx).With(l1).With(l2).With(l3).Log("a message") },
expect: `time=2020-03-05T14:27:48 l1=1 l2=2 l3=3 msg="a message"`,
}, {
name: "span",
events: func(ctx context.Context) {
ctx, end := event.To(ctx).Start("span")
end()
},
expect: `
time=2020-03-05T14:27:48 trace=1 name=span
time=2020-03-05T14:27:49 parent=1 end
`}, {
name: "span nested",
events: func(ctx context.Context) {
ctx, end := event.To(ctx).Start("parent")
defer end()
child, end2 := event.To(ctx).Start("child")
defer end2()
event.To(child).Log("message")
},
expect: `
time=2020-03-05T14:27:48 trace=1 name=parent
time=2020-03-05T14:27:49 parent=1 trace=2 name=child
time=2020-03-05T14:27:50 parent=2 msg=message
time=2020-03-05T14:27:51 parent=2 end
time=2020-03-05T14:27:52 parent=1 end
`}, {
name: "counter",
events: func(ctx context.Context) { event.To(ctx).With(l1).Metric(counter.Record(2)) },
expect: `time=2020-03-05T14:27:48 l1=1 metricValue=2 metric=Metric("golang.org/x/exp/event_test/hits")`,
}, {
name: "gauge",
events: func(ctx context.Context) { event.To(ctx).With(l1).Metric(gauge.Record(98.6)) },
expect: `time=2020-03-05T14:27:48 l1=1 metricValue=98.6 metric=Metric("golang.org/x/exp/event_test/temperature")`,
}, {
name: "duration",
events: func(ctx context.Context) {
event.To(ctx).With(l1).With(l2).Metric(latency.Record(3 * time.Second))
},
expect: `time=2020-03-05T14:27:48 l1=1 l2=2 metricValue=3s metric=Metric("golang.org/x/exp/event_test/latency")`,
}, {
name: "annotate",
events: func(ctx context.Context) { event.To(ctx).With(l1).Annotate() },
expect: `time=2020-03-05T14:27:48 l1=1`,
}, {
name: "annotate 2",
events: func(ctx context.Context) { event.To(ctx).With(l1).With(l2).Annotate() },
expect: `time=2020-03-05T14:27:48 l1=1 l2=2`,
}, {
name: "multiple events",
events: func(ctx context.Context) {
b := event.To(ctx)
b.Clone().With(keys.Int("myInt").Of(6)).Log("my event")
b.With(keys.String("myString").Of("some string value")).Log("string event")
},
expect: `
time=2020-03-05T14:27:48 myInt=6 msg="my event"
time=2020-03-05T14:27:49 myString="some string value" msg="string event"
`}} {
buf := &strings.Builder{}
ctx := event.WithExporter(ctx, event.NewExporter(logfmt.NewHandler(buf), eventtest.ExporterOptions()))
test.events(ctx)
got := strings.TrimSpace(buf.String())
expect := strings.TrimSpace(test.expect)
if got != expect {
t.Errorf("%s failed\ngot : %s\nexpect: %s", test.name, got, expect)
}
}
}
func ExampleLog() {
ctx := event.WithExporter(context.Background(), event.NewExporter(logfmt.NewHandler(os.Stdout), eventtest.ExporterOptions()))
event.To(ctx).With(keys.Int("myInt").Of(6)).Log("my event")
event.To(ctx).With(keys.String("myString").Of("some string value")).Log("error event")
// Output:
// time=2020-03-05T14:27:48 myInt=6 msg="my event"
// time=2020-03-05T14:27:49 myString="some string value" msg="error event"
}