Wrap error

gistfile1.txt

import (
	"errors"
	"fmt"
	"testing"
  
	errorspkg "github.com/pkg/errors"
	"github.com/stretchr/testify/assert"
)

func TestErr(t *testing.T) {
	ErrTest := errors.New("test error")
	ErrTest2 := errors.New("test error 2")
	ErrUsingFmt := fmt.Errorf("fmt error: %w", ErrTest)
	ErrUsingJoin := errors.Join(ErrTest2, fmt.Errorf("join error: %w", ErrTest))
	ErrUsingErrorsPkg := errorspkg.Wrap(ErrTest, "errors pkg error")

	fmt.Println("original error: ", errors.Unwrap(ErrUsingFmt))
	fmt.Println("1. ErrUsingFmt: ", ErrUsingFmt)
	fmt.Println("2. ErrUsingJoin: ", ErrUsingJoin)
	fmt.Println("3. ErrUsingErrorsPkg: ", ErrUsingErrorsPkg)

	assert.True(t, errors.Is(ErrUsingFmt, ErrTest))
	assert.True(t, errors.Is(ErrUsingJoin, ErrTest))
	assert.True(t, errors.Is(ErrUsingErrorsPkg, ErrTest))
}