145 lines
3.5 KiB
Go
145 lines
3.5 KiB
Go
package fserrors
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import (
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"fmt"
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"io"
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"net"
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"net/url"
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"os"
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"syscall"
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"testing"
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"github.com/pkg/errors"
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"github.com/stretchr/testify/assert"
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)
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var errUseOfClosedNetworkConnection = errors.New("use of closed network connection")
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// make a plausible network error with the underlying errno
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func makeNetErr(errno syscall.Errno) error {
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return &net.OpError{
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Op: "write",
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Net: "tcp",
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Source: &net.TCPAddr{IP: net.ParseIP("127.0.0.1"), Port: 123},
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Addr: &net.TCPAddr{IP: net.ParseIP("127.0.0.1"), Port: 8080},
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Err: &os.SyscallError{
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Syscall: "write",
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Err: errno,
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},
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}
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}
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type myError1 struct {
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Err error
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}
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func (e myError1) Error() string { return e.Err.Error() }
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type myError2 struct {
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Err error
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}
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func (e *myError2) Error() string {
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if e == nil {
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return "myError2(nil)"
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}
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if e.Err == nil {
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return "myError2{Err: nil}"
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}
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return e.Err.Error()
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}
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type myError3 struct {
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Err int
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}
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func (e *myError3) Error() string { return "hello" }
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type myError4 struct {
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e error
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}
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func (e *myError4) Error() string { return e.e.Error() }
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type errorCause struct {
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e error
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}
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func (e *errorCause) Error() string { return fmt.Sprintf("%#v", e) }
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func (e *errorCause) Cause() error { return e.e }
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func TestCause(t *testing.T) {
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e3 := &myError3{3}
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e4 := &myError4{io.EOF}
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eNil1 := &myError2{nil}
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eNil2 := &myError2{Err: (*myError2)(nil)}
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errPotato := errors.New("potato")
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nilCause1 := &errorCause{nil}
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nilCause2 := &errorCause{(*myError2)(nil)}
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for i, test := range []struct {
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err error
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wantRetriable bool
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wantErr error
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}{
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{nil, false, nil},
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{errPotato, false, errPotato},
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{errors.Wrap(errPotato, "potato"), false, errPotato},
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{errors.Wrap(errors.Wrap(errPotato, "potato2"), "potato"), false, errPotato},
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{errUseOfClosedNetworkConnection, false, errUseOfClosedNetworkConnection},
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{makeNetErr(syscall.EAGAIN), true, syscall.EAGAIN},
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{makeNetErr(syscall.Errno(123123123)), false, syscall.Errno(123123123)},
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{eNil1, false, eNil1},
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{eNil2, false, eNil2.Err},
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{myError1{io.EOF}, false, io.EOF},
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{&myError2{io.EOF}, false, io.EOF},
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{e3, false, e3},
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{e4, false, e4},
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{&errorCause{errPotato}, false, errPotato},
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{nilCause1, false, nilCause1},
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{nilCause2, false, nilCause2.e},
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} {
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gotRetriable, gotErr := Cause(test.err)
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what := fmt.Sprintf("test #%d: %v", i, test.err)
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assert.Equal(t, test.wantErr, gotErr, what)
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assert.Equal(t, test.wantRetriable, gotRetriable, what)
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}
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}
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func TestShouldRetry(t *testing.T) {
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for i, test := range []struct {
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err error
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want bool
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}{
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{nil, false},
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{errors.New("potato"), false},
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{errors.Wrap(errUseOfClosedNetworkConnection, "connection"), true},
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{io.EOF, true},
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{io.ErrUnexpectedEOF, true},
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{makeNetErr(syscall.EAGAIN), true},
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{makeNetErr(syscall.Errno(123123123)), false},
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{&url.Error{Op: "post", URL: "/", Err: io.EOF}, true},
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{&url.Error{Op: "post", URL: "/", Err: errUseOfClosedNetworkConnection}, true},
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{&url.Error{Op: "post", URL: "/", Err: fmt.Errorf("net/http: HTTP/1.x transport connection broken: %v", fmt.Errorf("http: ContentLength=%d with Body length %d", 100663336, 99590598))}, true},
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{
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errors.Wrap(&url.Error{
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Op: "post",
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URL: "http://localhost/",
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Err: makeNetErr(syscall.EPIPE),
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}, "potato error"),
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true,
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},
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{
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errors.Wrap(&url.Error{
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Op: "post",
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URL: "http://localhost/",
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Err: makeNetErr(syscall.Errno(123123123)),
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}, "listing error"),
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false,
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},
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} {
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got := ShouldRetry(test.err)
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assert.Equal(t, test.want, got, fmt.Sprintf("test #%d: %v", i, test.err))
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}
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}
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