log-rus-how-to-test-log-Fatalf

gistfile1.txt

package main

import (
	"bytes"
	"testing"

	log "github.com/sirupsen/logrus"
	"github.com/stretchr/testify/assert"
)

func TestEncryptionFailed(t *testing.T) {
  defer func() { log.StandardLogger().ExitFunc = nil }()
  b := new(bytes.Buffer)
  var fatalCrash bool
	log.StandardLogger().ExitFunc = func(int) { fatalCrash = true }
	log.StandardLogger().SetOutput(b)
  
  // contains log.log.Fatalf("Failed to encrypt the text %#v ", err)
  _ = foo.Serialize(false, true, []byte("wrong-key"))
	suite.True(fatalCrash, "should fail if encryption key is wrong")
	suite.Contains(b.String(), "Failed to encrypt the text")
}