zlog/log_test.go

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package zerolog
import (
"bytes"
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"errors"
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"reflect"
"testing"
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"time"
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)
func TestLog(t *testing.T) {
t.Run("empty", func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Log().Msg("")
if got, want := out.String(), "{}\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
})
t.Run("one-field", func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Log().Str("foo", "bar").Msg("")
if got, want := out.String(), `{"foo":"bar"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
})
t.Run("two-field", func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Log().
Str("foo", "bar").
Int("n", 123).
Msg("")
if got, want := out.String(), `{"foo":"bar","n":123}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
})
}
func TestInfo(t *testing.T) {
t.Run("empty", func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Info().Msg("")
if got, want := out.String(), `{"level":"info"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
})
t.Run("one-field", func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Info().Str("foo", "bar").Msg("")
if got, want := out.String(), `{"level":"info","foo":"bar"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
})
t.Run("two-field", func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Info().
Str("foo", "bar").
Int("n", 123).
Msg("")
if got, want := out.String(), `{"level":"info","foo":"bar","n":123}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
})
}
func TestWith(t *testing.T) {
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out := &bytes.Buffer{}
log := New(out).With().
Str("foo", "bar").
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AnErr("some_err", nil).
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Err(errors.New("some error")).
Bool("bool", true).
Int("int", 1).
Int8("int8", 2).
Int16("int16", 3).
Int32("int32", 4).
Int64("int64", 5).
Uint("uint", 6).
Uint8("uint8", 7).
Uint16("uint16", 8).
Uint32("uint32", 9).
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Uint64("uint64", 10).
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Float32("float32", 11).
Float64("float64", 12).
Time("time", time.Time{}).
Logger()
log.Log().Msg("")
if got, want := out.String(), `{"foo":"bar","error":"some error","bool":true,"int":1,"int8":2,"int16":3,"int32":4,"int64":5,"uint":6,"uint8":7,"uint16":8,"uint32":9,"uint64":10,"float32":11,"float64":12,"time":"0001-01-01T00:00:00Z"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
}
}
func TestFieldsMap(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Log().Fields(map[string]interface{}{
"nil": nil,
"string": "foo",
"bytes": []byte("bar"),
"error": errors.New("some error"),
"bool": true,
"int": int(1),
"int8": int8(2),
"int16": int16(3),
"int32": int32(4),
"int64": int64(5),
"uint": uint(6),
"uint8": uint8(7),
"uint16": uint16(8),
"uint32": uint32(9),
"uint64": uint64(10),
"float32": float32(11),
"float64": float64(12),
"dur": 1 * time.Second,
"time": time.Time{},
}).Msg("")
if got, want := out.String(), `{"bool":true,"bytes":"bar","dur":1000,"error":"some error","float32":11,"float64":12,"int":1,"int16":3,"int32":4,"int64":5,"int8":2,"nil":null,"string":"foo","time":"0001-01-01T00:00:00Z","uint":6,"uint16":8,"uint32":9,"uint64":10,"uint8":7}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
}
func TestFields(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
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now := time.Now()
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log.Log().
Str("string", "foo").
Bytes("bytes", []byte("bar")).
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AnErr("some_err", nil).
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Err(errors.New("some error")).
Bool("bool", true).
Int("int", 1).
Int8("int8", 2).
Int16("int16", 3).
Int32("int32", 4).
Int64("int64", 5).
Uint("uint", 6).
Uint8("uint8", 7).
Uint16("uint16", 8).
Uint32("uint32", 9).
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Uint64("uint64", 10).
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Float32("float32", 11).
Float64("float64", 12).
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Dur("dur", 1*time.Second).
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Time("time", time.Time{}).
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TimeDiff("diff", now, now.Add(-10*time.Second)).
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Msg("")
if got, want := out.String(), `{"string":"foo","bytes":"bar","error":"some error","bool":true,"int":1,"int8":2,"int16":3,"int32":4,"int64":5,"uint":6,"uint8":7,"uint16":8,"uint32":9,"uint64":10,"float32":11,"float64":12,"dur":1000,"time":"0001-01-01T00:00:00Z","diff":10000}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
}
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func TestFieldsArrayEmpty(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Log().
Strs("string", []string{}).
Errs("err", []error{}).
Bools("bool", []bool{}).
Ints("int", []int{}).
Ints8("int8", []int8{}).
Ints16("int16", []int16{}).
Ints32("int32", []int32{}).
Ints64("int64", []int64{}).
Uints("uint", []uint{}).
Uints8("uint8", []uint8{}).
Uints16("uint16", []uint16{}).
Uints32("uint32", []uint32{}).
Uints64("uint64", []uint64{}).
Floats32("float32", []float32{}).
Floats64("float64", []float64{}).
Durs("dur", []time.Duration{}).
Times("time", []time.Time{}).
Msg("")
if got, want := out.String(), `{"string":[],"err":[],"bool":[],"int":[],"int8":[],"int16":[],"int32":[],"int64":[],"uint":[],"uint8":[],"uint16":[],"uint32":[],"uint64":[],"float32":[],"float64":[],"dur":[],"time":[]}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
}
}
func TestFieldsArraySingleElement(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Log().
Strs("string", []string{"foo"}).
Errs("err", []error{errors.New("some error")}).
Bools("bool", []bool{true}).
Ints("int", []int{1}).
Ints8("int8", []int8{2}).
Ints16("int16", []int16{3}).
Ints32("int32", []int32{4}).
Ints64("int64", []int64{5}).
Uints("uint", []uint{6}).
Uints8("uint8", []uint8{7}).
Uints16("uint16", []uint16{8}).
Uints32("uint32", []uint32{9}).
Uints64("uint64", []uint64{10}).
Floats32("float32", []float32{11}).
Floats64("float64", []float64{12}).
Durs("dur", []time.Duration{1 * time.Second}).
Times("time", []time.Time{time.Time{}}).
Msg("")
if got, want := out.String(), `{"string":["foo"],"err":["some error"],"bool":[true],"int":[1],"int8":[2],"int16":[3],"int32":[4],"int64":[5],"uint":[6],"uint8":[7],"uint16":[8],"uint32":[9],"uint64":[10],"float32":[11],"float64":[12],"dur":[1000],"time":["0001-01-01T00:00:00Z"]}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
}
}
func TestFieldsArrayMultipleElement(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Log().
Strs("string", []string{"foo", "bar"}).
Errs("err", []error{errors.New("some error"), nil}).
Bools("bool", []bool{true, false}).
Ints("int", []int{1, 0}).
Ints8("int8", []int8{2, 0}).
Ints16("int16", []int16{3, 0}).
Ints32("int32", []int32{4, 0}).
Ints64("int64", []int64{5, 0}).
Uints("uint", []uint{6, 0}).
Uints8("uint8", []uint8{7, 0}).
Uints16("uint16", []uint16{8, 0}).
Uints32("uint32", []uint32{9, 0}).
Uints64("uint64", []uint64{10, 0}).
Floats32("float32", []float32{11, 0}).
Floats64("float64", []float64{12, 0}).
Durs("dur", []time.Duration{1 * time.Second, 0}).
Times("time", []time.Time{time.Time{}, time.Time{}}).
Msg("")
if got, want := out.String(), `{"string":["foo","bar"],"err":["some error",null],"bool":[true,false],"int":[1,0],"int8":[2,0],"int16":[3,0],"int32":[4,0],"int64":[5,0],"uint":[6,0],"uint8":[7,0],"uint16":[8,0],"uint32":[9,0],"uint64":[10,0],"float32":[11,0],"float64":[12,0],"dur":[1000,0],"time":["0001-01-01T00:00:00Z","0001-01-01T00:00:00Z"]}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
}
}
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func TestFieldsDisabled(t *testing.T) {
out := &bytes.Buffer{}
log := New(out).Level(InfoLevel)
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now := time.Now()
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log.Debug().
Str("string", "foo").
Bytes("bytes", []byte("bar")).
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AnErr("some_err", nil).
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Err(errors.New("some error")).
Bool("bool", true).
Int("int", 1).
Int8("int8", 2).
Int16("int16", 3).
Int32("int32", 4).
Int64("int64", 5).
Uint("uint", 6).
Uint8("uint8", 7).
Uint16("uint16", 8).
Uint32("uint32", 9).
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Uint64("uint64", 10).
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Float32("float32", 11).
Float64("float64", 12).
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Dur("dur", 1*time.Second).
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Time("time", time.Time{}).
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TimeDiff("diff", now, now.Add(-10*time.Second)).
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Msg("")
if got, want := out.String(), ""; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
}
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func TestMsgf(t *testing.T) {
out := &bytes.Buffer{}
log := New(out)
log.Log().Msgf("one %s %.1f %d %v", "two", 3.4, 5, errors.New("six"))
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if got, want := out.String(), `{"message":"one two 3.4 5 six"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
}
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func TestWithAndFieldsCombined(t *testing.T) {
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out := &bytes.Buffer{}
log := New(out).With().Str("f1", "val").Str("f2", "val").Logger()
log.Log().Str("f3", "val").Msg("")
if got, want := out.String(), `{"f1":"val","f2":"val","f3":"val"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
}
func TestLevel(t *testing.T) {
t.Run("Disabled", func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out).Level(Disabled)
log.Info().Msg("test")
if got, want := out.String(), ""; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
})
t.Run("Info", func(t *testing.T) {
out := &bytes.Buffer{}
log := New(out).Level(InfoLevel)
log.Info().Msg("test")
if got, want := out.String(), `{"level":"info","message":"test"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
})
}
func TestSampling(t *testing.T) {
out := &bytes.Buffer{}
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log := New(out).Sample(&BasicSampler{N: 2})
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log.Log().Int("i", 1).Msg("")
log.Log().Int("i", 2).Msg("")
log.Log().Int("i", 3).Msg("")
log.Log().Int("i", 4).Msg("")
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if got, want := out.String(), "{\"i\":2}\n{\"i\":4}\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
}
type levelWriter struct {
ops []struct {
l Level
p string
}
}
func (lw *levelWriter) Write(p []byte) (int, error) {
return len(p), nil
}
func (lw *levelWriter) WriteLevel(lvl Level, p []byte) (int, error) {
lw.ops = append(lw.ops, struct {
l Level
p string
}{lvl, string(p)})
return len(p), nil
}
func TestLevelWriter(t *testing.T) {
lw := &levelWriter{
ops: []struct {
l Level
p string
}{},
}
log := New(lw)
log.Debug().Msg("1")
log.Info().Msg("2")
log.Warn().Msg("3")
log.Error().Msg("4")
log.WithLevel(DebugLevel).Msg("5")
log.WithLevel(InfoLevel).Msg("6")
log.WithLevel(WarnLevel).Msg("7")
log.WithLevel(ErrorLevel).Msg("8")
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want := []struct {
l Level
p string
}{
{DebugLevel, `{"level":"debug","message":"1"}` + "\n"},
{InfoLevel, `{"level":"info","message":"2"}` + "\n"},
{WarnLevel, `{"level":"warn","message":"3"}` + "\n"},
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{ErrorLevel, `{"level":"error","message":"4"}` + "\n"},
{DebugLevel, `{"level":"debug","message":"5"}` + "\n"},
{InfoLevel, `{"level":"info","message":"6"}` + "\n"},
{WarnLevel, `{"level":"warn","message":"7"}` + "\n"},
{ErrorLevel, `{"level":"error","message":"8"}` + "\n"},
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}
if got := lw.ops; !reflect.DeepEqual(got, want) {
t.Errorf("invalid ops:\ngot:\n%v\nwant:\n%v", got, want)
}
}
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func TestContextTimestamp(t *testing.T) {
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TimestampFunc = func() time.Time {
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return time.Date(2001, time.February, 3, 4, 5, 6, 7, time.UTC)
}
defer func() {
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TimestampFunc = time.Now
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}()
out := &bytes.Buffer{}
log := New(out).With().Timestamp().Str("foo", "bar").Logger()
log.Log().Msg("hello world")
if got, want := out.String(), `{"time":"2001-02-03T04:05:06Z","foo":"bar","message":"hello world"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
}
func TestEventTimestamp(t *testing.T) {
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TimestampFunc = func() time.Time {
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return time.Date(2001, time.February, 3, 4, 5, 6, 7, time.UTC)
}
defer func() {
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TimestampFunc = time.Now
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}()
out := &bytes.Buffer{}
log := New(out).With().Str("foo", "bar").Logger()
log.Log().Timestamp().Msg("hello world")
if got, want := out.String(), `{"foo":"bar","time":"2001-02-03T04:05:06Z","message":"hello world"}`+"\n"; got != want {
t.Errorf("invalid log output:\ngot: %v\nwant: %v", got, want)
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}
}