extern/rclone
1
0
Fork 0
mirror of https://github.com/rclone/rclone.git synced 2025-08-14 07:49:00 +02:00
Code Issues Packages Projects Releases Wiki Activity

fs/fserrors: make sure Cause never returns nil

Browse Source
This commit is contained in:
Nick Craig-Wood
2018-07-13 10:31:40 +01:00
parent b1bd17a220
commit a3d9a38f51
2 changed files with 35 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
fs/fserrors/error_test.go
View File

@ -39,7 +39,15 @@ type myError2 struct {
Err error
}
func (e *myError2) Error() string { return e.Err.Error() }
func (e *myError2) Error() string {
if e == nil {
return "myError2(nil)"
}
if e.Err == nil {
return "myError2{Err: nil}"
}
return e.Err.Error()
}
type myError3 struct {
Err int
@ -53,11 +61,23 @@ type myError4 struct {
func (e *myError4) Error() string { return e.e.Error() }
type errorCause struct {
e error
}
func (e *errorCause) Error() string { return fmt.Sprintf("%#v", e) }
func (e *errorCause) Cause() error { return e.e }
func TestCause(t *testing.T) {
e3 := &myError3{3}
e4 := &myError4{io.EOF}
eNil1 := &myError2{nil}
eNil2 := &myError2{Err: (*myError2)(nil)}
errPotato := errors.New("potato")
nilCause1 := &errorCause{nil}
nilCause2 := &errorCause{(*myError2)(nil)}
for i, test := range []struct {
err error
wantRetriable bool
@ -70,10 +90,15 @@ func TestCause(t *testing.T) {
{errUseOfClosedNetworkConnection, false, errUseOfClosedNetworkConnection},
{makeNetErr(syscall.EAGAIN), true, syscall.EAGAIN},
{makeNetErr(syscall.Errno(123123123)), false, syscall.Errno(123123123)},
{eNil1, false, eNil1},
{eNil2, false, eNil2.Err},
{myError1{io.EOF}, false, io.EOF},
{&myError2{io.EOF}, false, io.EOF},
{e3, false, e3},
{e4, false, e4},
{&errorCause{errPotato}, false, errPotato},
{nilCause1, false, nilCause1},
{nilCause2, false, nilCause2.e},
} {
gotRetriable, gotErr := Cause(test.err)
what := fmt.Sprintf("test #%d: %v", i, test.err)