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							- package xerr
 
- import (
 
- 	"errors"
 
- 	"testing"
 
- 	"github.com/stretchr/testify/assert"
 
- )
 
- func Test_withStack_Unwrap(t *testing.T) {
 
- 	err := &CustomError{msg: "test error"}
 
- 	stackErr := WithStack(err)
 
- 	assert.NotEqual(t, stackErr, err)
 
- 	assert.Equal(t, errors.Unwrap(stackErr), err)
 
- 	assert.True(t, errors.Is(stackErr, err))
 
- 	assert.ErrorIs(t, stackErr, err)
 
- }
 
 
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