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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package mlog
import (
"io"
"strings"
"testing"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
// testingWriter is an io.Writer that writes through t.Log
type testingWriter struct {
tb testing.TB
}
func (tw *testingWriter) Write(b []byte) (int, error) {
tw.tb.Log(strings.TrimSpace(string(b)))
return len(b), nil
}
// NewTestingLogger creates a Logger that proxies logs through a testing interface.
// This allows tests that spin up App instances to avoid spewing logs unless the test fails or -verbose is specified.
func NewTestingLogger(tb testing.TB, writer io.Writer) *Logger {
logWriter := &testingWriter{tb}
multiWriter := io.MultiWriter(logWriter, writer)
logWriterSync := zapcore.AddSync(multiWriter)
testingLogger := &Logger{
consoleLevel: zap.NewAtomicLevelAt(getZapLevel("debug")),
fileLevel: zap.NewAtomicLevelAt(getZapLevel("info")),
logrLogger: newLogr(),
}
logWriterCore := zapcore.NewCore(makeEncoder(true), zapcore.Lock(logWriterSync), testingLogger.consoleLevel)
testingLogger.zap = zap.New(logWriterCore,
zap.AddCaller(),
)
return testingLogger
}
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