1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
// Copyright 2018 Google LLC All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package retry
import (
"context"
"fmt"
"net/http"
"net/url"
"testing"
)
type temp struct{}
func (e temp) Error() string {
return "temporary error"
}
func (e temp) Temporary() bool {
return true
}
func TestRetry(t *testing.T) {
for i, test := range []struct {
predicate Predicate
err error
shouldRetry bool
}{{
predicate: IsTemporary,
err: nil,
shouldRetry: false,
}, {
predicate: IsTemporary,
err: fmt.Errorf("not temporary"),
shouldRetry: false,
}, {
predicate: IsNotNil,
err: fmt.Errorf("not temporary"),
shouldRetry: true,
}, {
predicate: IsTemporary,
err: temp{},
shouldRetry: true,
}, {
predicate: IsTemporary,
err: context.DeadlineExceeded,
shouldRetry: false,
}, {
predicate: IsTemporary,
err: &url.Error{
Op: http.MethodPost,
URL: "http://127.0.0.1:56520/v2/example/blobs/uploads/",
Err: context.DeadlineExceeded,
},
shouldRetry: false,
}} {
// Make sure we retry 5 times if we shouldRetry.
steps := 5
backoff := Backoff{
Steps: steps,
}
// Count how many times this function is invoked.
count := 0
f := func() error {
count++
return test.err
}
Retry(f, test.predicate, backoff)
if test.shouldRetry && count != steps {
t.Errorf("expected %d to retry %v, did not", i, test.err)
} else if !test.shouldRetry && count == steps {
t.Errorf("expected %d not to retry %v, but did", i, test.err)
}
}
}
// Make sure we don't panic.
func TestNil(t *testing.T) {
if err := Retry(nil, nil, Backoff{}); err == nil {
t.Errorf("got nil when passing in nil f")
}
if err := Retry(func() error { return nil }, nil, Backoff{}); err == nil {
t.Errorf("got nil when passing in nil p")
}
}
|
