| // 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" |
| |
| "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) |
| ) |
| |
| 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 kind=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 trace=2 parent=1 name=child |
| time=2020-03-05T14:27:50 parent=2 msg=message |
| time=2020-03-05T14:27:51 parent=2 kind=end |
| time=2020-03-05T14:27:52 parent=1 kind=end |
| `}, { |
| name: "metric", |
| events: func(ctx context.Context) { event.To(ctx).With(l1).Metric() }, |
| expect: `time=2020-03-05T14:27:48 kind=metric l1=1`, |
| }, { |
| name: "metric 2", |
| events: func(ctx context.Context) { event.To(ctx).With(l1).With(l2).Metric() }, |
| expect: `time=2020-03-05T14:27:48 kind=metric l1=1 l2=2`, |
| }, { |
| name: "annotate", |
| events: func(ctx context.Context) { event.To(ctx).With(l1).Annotate() }, |
| expect: `time=2020-03-05T14:27:48 kind=annotate 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 kind=annotate 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.FixedNow(ctx) |
| 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.FixedNow(ctx) |
| 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" |
| } |