zlog/console_test.go

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package zerolog_test
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"strings"
"testing"
"time"
"github.com/rs/zerolog"
)
func ExampleConsoleWriter() {
log := zerolog.New(zerolog.ConsoleWriter{Out: os.Stdout, NoColor: true})
log.Info().Str("foo", "bar").Msg("Hello World")
// Output: <nil> INF Hello World foo=bar
}
func ExampleConsoleWriter_customFormatters() {
out := zerolog.ConsoleWriter{Out: os.Stdout, NoColor: true}
out.FormatLevel = func(i interface{}) string { return strings.ToUpper(fmt.Sprintf("%-6s|", i)) }
out.FormatFieldName = func(i interface{}) string { return fmt.Sprintf("%s:", i) }
out.FormatFieldValue = func(i interface{}) string { return strings.ToUpper(fmt.Sprintf("%s", i)) }
log := zerolog.New(out)
log.Info().Str("foo", "bar").Msg("Hello World")
// Output: <nil> INFO | Hello World foo:BAR
}
func ExampleNewConsoleWriter() {
out := zerolog.NewConsoleWriter()
out.NoColor = true // For testing purposes only
log := zerolog.New(out)
log.Debug().Str("foo", "bar").Msg("Hello World")
// Output: <nil> DBG Hello World foo=bar
}
func ExampleNewConsoleWriter_customFormatters() {
out := zerolog.NewConsoleWriter(
func(w *zerolog.ConsoleWriter) {
// Customize time format
w.TimeFormat = time.RFC822
// Customize level formatting
w.FormatLevel = func(i interface{}) string { return strings.ToUpper(fmt.Sprintf("[%-5s]", i)) }
},
)
out.NoColor = true // For testing purposes only
log := zerolog.New(out)
log.Info().Str("foo", "bar").Msg("Hello World")
// Output: <nil> [INFO ] Hello World foo=bar
}
func TestConsoleLogger(t *testing.T) {
t.Run("Numbers", func(t *testing.T) {
buf := &bytes.Buffer{}
log := zerolog.New(zerolog.ConsoleWriter{Out: buf, NoColor: true})
log.Info().
Float64("float", 1.23).
Uint64("small", 123).
Uint64("big", 1152921504606846976).
Msg("msg")
if got, want := strings.TrimSpace(buf.String()), "<nil> INF msg big=1152921504606846976 float=1.23 small=123"; got != want {
t.Errorf("\ngot:\n%s\nwant:\n%s", got, want)
}
})
}
func TestConsoleWriter(t *testing.T) {
t.Run("Default field formatter", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: true, PartsOrder: []string{"foo"}}
_, err := w.Write([]byte(`{"foo" : "DEFAULT"}`))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "DEFAULT foo=DEFAULT\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
t.Run("Write colorized", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: false}
_, err := w.Write([]byte(`{"level" : "warn", "message" : "Foobar"}`))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "\x1b[90m<nil>\x1b[0m \x1b[31mWRN\x1b[0m Foobar\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
t.Run("Write fields", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: true}
d := time.Unix(0, 0).UTC().Format(time.RFC3339)
_, err := w.Write([]byte(`{"time" : "` + d + `", "level" : "debug", "message" : "Foobar", "foo" : "bar"}`))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "12:00AM DBG Foobar foo=bar\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
t.Run("Write colorized fields", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: false}
_, err := w.Write([]byte(`{"level" : "warn", "message" : "Foobar", "foo": "bar"}`))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "\x1b[90m<nil>\x1b[0m \x1b[31mWRN\x1b[0m Foobar \x1b[36mfoo=\x1b[0mbar\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
t.Run("Write error field", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: true}
d := time.Unix(0, 0).UTC().Format(time.RFC3339)
evt := `{"time" : "` + d + `", "level" : "error", "message" : "Foobar", "aaa" : "bbb", "error" : "Error"}`
// t.Log(evt)
_, err := w.Write([]byte(evt))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "12:00AM ERR Foobar error=Error aaa=bbb\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
t.Run("Write caller field", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: true}
cwd, err := os.Getwd()
if err != nil {
t.Fatalf("Cannot get working directory: %s", err)
}
d := time.Unix(0, 0).UTC().Format(time.RFC3339)
evt := `{"time" : "` + d + `", "level" : "debug", "message" : "Foobar", "foo" : "bar", "caller" : "` + cwd + `/foo/bar.go"}`
// t.Log(evt)
_, err = w.Write([]byte(evt))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "12:00AM DBG foo/bar.go > Foobar foo=bar\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
t.Run("Write JSON field", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: true}
evt := `{"level" : "debug", "message" : "Foobar", "foo" : [1, 2, 3], "bar" : true}`
// t.Log(evt)
_, err := w.Write([]byte(evt))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "<nil> DBG Foobar bar=true foo=[1,2,3]\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
}
func TestConsoleWriterConfiguration(t *testing.T) {
t.Run("Sets TimeFormat", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: true, TimeFormat: time.RFC3339}
d := time.Unix(0, 0).UTC().Format(time.RFC3339)
evt := `{"time" : "` + d + `", "level" : "info", "message" : "Foobar"}`
_, err := w.Write([]byte(evt))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "1970-01-01T00:00:00Z INF Foobar\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
t.Run("Sets PartsOrder", func(t *testing.T) {
buf := &bytes.Buffer{}
w := zerolog.ConsoleWriter{Out: buf, NoColor: true, PartsOrder: []string{"message", "level"}}
evt := `{"level" : "info", "message" : "Foobar"}`
_, err := w.Write([]byte(evt))
if err != nil {
t.Errorf("Unexpected error when writing output: %s", err)
}
expectedOutput := "Foobar INF\n"
actualOutput := buf.String()
if actualOutput != expectedOutput {
t.Errorf("Unexpected output %q, want: %q", actualOutput, expectedOutput)
}
})
}
func BenchmarkConsoleWriter(b *testing.B) {
b.ResetTimer()
b.ReportAllocs()
var msg = []byte(`{"level" : "info", "foo" : "bar", "message" : "HELLO", "time" : "1990-01-01"}`)
w := zerolog.ConsoleWriter{Out: ioutil.Discard, NoColor: false}
for i := 0; i < b.N; i++ {
w.Write(msg)
}
}