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
|
// Copyright 2021 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 cache
import (
"testing"
v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/random"
)
func TestReadOnly(t *testing.T) {
m := &memcache{map[v1.Hash]v1.Layer{}}
ro := ReadOnly(m)
// Populate the cache.
img, err := random.Image(10, 1)
if err != nil {
t.Fatalf("random.Image: %v", err)
}
img = Image(img, m)
ls, err := img.Layers()
if err != nil {
t.Fatalf("Layers: %v", err)
}
if got, want := len(ls), 1; got != want {
t.Fatalf("Layers returned %d layers, want %d", got, want)
}
h, err := ls[0].Digest()
if err != nil {
t.Fatalf("layer.Digest: %v", err)
}
m.m[h] = ls[0]
// Layer can be read from original cache and RO cache.
if _, err := m.Get(h); err != nil {
t.Fatalf("m.Get: %v", err)
}
if _, err := ro.Get(h); err != nil {
t.Fatalf("ro.Get: %v", err)
}
ln := len(m.m)
// RO Put is a no-op.
if _, err := ro.Put(ls[0]); err != nil {
t.Fatalf("ro.Put: %v", err)
}
if got, want := len(m.m), ln; got != want {
t.Errorf("After Put, got %v entries, want %v", got, want)
}
// RO Delete is a no-op.
if err := ro.Delete(h); err != nil {
t.Fatalf("ro.Delete: %v", err)
}
if got, want := len(m.m), ln; got != want {
t.Errorf("After Delete, got %v entries, want %v", got, want)
}
// Deleting from the underlying RW cache updates RO view.
if err := m.Delete(h); err != nil {
t.Fatalf("m.Delete: %v", err)
}
if got, want := len(m.m), 0; got != want {
t.Errorf("After RW Delete, got %v entries, want %v", got, want)
}
}
|
