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 random
import (
"math/rand"
"testing"
v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/types"
"github.com/google/go-containerregistry/pkg/v1/validate"
)
func TestRandomIndex(t *testing.T) {
ii, err := Index(1024, 5, 3)
if err != nil {
t.Fatalf("Error loading index: %v", err)
}
if err := validate.Index(ii); err != nil {
t.Errorf("validate.Index() = %v", err)
}
digest, err := ii.Digest()
if err != nil {
t.Fatalf("Digest(): unexpected err: %v", err)
}
if _, err := ii.Image(digest); err == nil {
t.Errorf("Image(%s): expected err, got nil", digest)
}
if _, err := ii.ImageIndex(digest); err == nil {
t.Errorf("ImageIndex(%s): expected err, got nil", digest)
}
mt, err := ii.MediaType()
if err != nil {
t.Errorf("MediaType(): unexpected err: %v", err)
}
if got, want := mt, types.OCIImageIndex; got != want {
t.Errorf("MediaType(): got: %v, want: %v", got, want)
}
man, err := ii.IndexManifest()
if err != nil {
t.Errorf("IndexManifest(): unexpected err: %v", err)
}
if got, want := man.MediaType, types.OCIImageIndex; got != want {
t.Errorf("MediaType: got: %v, want: %v", got, want)
}
}
func TestRandomIndexSource(t *testing.T) {
indexDigest := func(o ...Option) v1.Hash {
img, err := Index(1024, 2, 2, o...)
if err != nil {
t.Fatalf("Image: %v", err)
}
h, err := img.Digest()
if err != nil {
t.Fatalf("Digest(): %v", err)
}
return h
}
digest0a := indexDigest(WithSource(rand.NewSource(0)))
digest0b := indexDigest(WithSource(rand.NewSource(0)))
digest1 := indexDigest(WithSource(rand.NewSource(1)))
if digest0a != digest0b {
t.Error("Expected the index digest to be the same with the same seed")
}
if digest0a == digest1 {
t.Error("Expected the index digest to be different with different seeds")
}
digestA := indexDigest()
digestB := indexDigest()
if digestA == digestB {
t.Error("Expected the index digest to be different with different random seeds")
}
}
|
