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package errors_test
import (
"errors"
"fmt"
"testing"
"github.com/stretchr/testify/assert"
liberrors "github.com/rclone/rclone/lib/errors"
)
func TestWalk(t *testing.T) {
origin := errors.New("origin")
for _, test := range []struct {
err error
calls int
last error
}{
{causerError{nil}, 1, causerError{nil}},
{wrapperError{nil}, 1, wrapperError{nil}},
{reflectError{nil}, 1, reflectError{nil}},
{causerError{origin}, 2, origin},
{wrapperError{origin}, 2, origin},
{reflectError{origin}, 2, origin},
{causerError{reflectError{origin}}, 3, origin},
{wrapperError{causerError{origin}}, 3, origin},
{reflectError{wrapperError{origin}}, 3, origin},
{causerError{reflectError{causerError{origin}}}, 4, origin},
{wrapperError{causerError{wrapperError{origin}}}, 4, origin},
{reflectError{wrapperError{reflectError{origin}}}, 4, origin},
{stopError{nil}, 1, stopError{nil}},
{stopError{causerError{nil}}, 1, stopError{causerError{nil}}},
{stopError{wrapperError{nil}}, 1, stopError{wrapperError{nil}}},
{stopError{reflectError{nil}}, 1, stopError{reflectError{nil}}},
{causerError{stopError{origin}}, 2, stopError{origin}},
{wrapperError{stopError{origin}}, 2, stopError{origin}},
{reflectError{stopError{origin}}, 2, stopError{origin}},
{causerError{reflectError{stopError{nil}}}, 3, stopError{nil}},
{wrapperError{causerError{stopError{nil}}}, 3, stopError{nil}},
{reflectError{wrapperError{stopError{nil}}}, 3, stopError{nil}},
} {
var last error
calls := 0
liberrors.Walk(test.err, func(err error) bool {
calls++
last = err
_, stop := err.(stopError)
return stop
})
assert.Equal(t, test.calls, calls)
assert.Equal(t, test.last, last)
}
}
type causerError struct {
err error
}
type wrapperError struct {
err error
}
type reflectError struct {
Err error
}
type stopError struct {
err error
}
func (e causerError) Error() string {
return fmt.Sprintf("causerError(%s)", e.err)
}
func (e causerError) Cause() error {
return e.err
}
func (e wrapperError) Unwrap() error {
return e.err
}
func (e wrapperError) Error() string {
return fmt.Sprintf("wrapperError(%s)", e.err)
}
func (e reflectError) Error() string {
return fmt.Sprintf("reflectError(%s)", e.Err)
}
func (e stopError) Error() string {
return fmt.Sprintf("stopError(%s)", e.err)
}
func (e stopError) Cause() error {
return e.err
}
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