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testlogger.go
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testlogger.go
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package log
import (
"fmt"
"log"
"sort"
"strings"
"testing"
"time"
"github.com/datawire/dlib/dlog"
"github.com/telepresenceio/telepresence/v2/pkg/maps"
)
type tbWrapper struct {
testing.TB
level dlog.LogLevel
fields map[string]any
}
type tbWriter struct {
*tbWrapper
l dlog.LogLevel
}
func (w *tbWriter) Write(data []byte) (n int, err error) {
w.Helper()
w.Log(w.l, strings.TrimSuffix(string(data), "\n")) // strip trailing newline if present, since the Log() call appends a newline
return len(data), nil
}
func NewTestLogger(t testing.TB, level dlog.LogLevel) dlog.Logger {
return &tbWrapper{TB: t, level: level}
}
func (w *tbWrapper) StdLogger(l dlog.LogLevel) *log.Logger {
return log.New(&tbWriter{tbWrapper: w, l: l}, "", 0)
}
func (w *tbWrapper) WithField(key string, value any) dlog.Logger {
ret := tbWrapper{
TB: w.TB,
fields: make(map[string]any, len(w.fields)+1),
}
maps.Merge(ret.fields, w.fields)
ret.fields[key] = value
return &ret
}
func (w *tbWrapper) Log(level dlog.LogLevel, msg string) {
if level > w.level {
return
}
w.Helper()
w.UnformattedLog(level, msg)
}
func (w *tbWrapper) UnformattedLog(level dlog.LogLevel, args ...any) {
if level > w.level {
return
}
w.Helper()
sb := strings.Builder{}
sb.WriteString(time.Now().Format("15:04:05.0000"))
for _, arg := range args {
sb.WriteString(" ")
fmt.Fprint(&sb, arg)
}
if len(w.fields) > 0 {
parts := make([]string, 0, len(w.fields))
for k := range w.fields {
parts = append(parts, k)
}
sort.Strings(parts)
for i, k := range parts {
if i > 0 {
sb.WriteString(" ")
}
fmt.Fprintf(&sb, "%s=%#v", k, w.fields[k])
}
}
w.TB.Log(sb.String())
}
func (w *tbWrapper) UnformattedLogf(level dlog.LogLevel, format string, args ...any) {
if level > w.level {
return
}
w.Helper()
w.Log(level, fmt.Sprintf(format, args...))
}
func (w *tbWrapper) UnformattedLogln(level dlog.LogLevel, args ...any) {
if level > w.level {
return
}
w.Helper()
w.Log(level, fmt.Sprintln(args...))
}