forked from TrueCloudLab/distribution
1052518d9f
This upstreams `Sort()` as originally implemented in containerd in https://github.com/containerd/containerd/0886ceaea2470edc7339dfc5ebe0e3257ae84d06 From that commit: > Fix reference ordering in CRI image store > > Currently image references end up being stored in a > random order due to the way maps are iterated through > in Go. This leads to inconsistent identifiers being > resolved when a single reference is needed to identify > an image and the ordering of the references is used for > the selection. > > Sort references in a consistent and ranked manner, > from higher information formats to lower. > > Note: A `name + tag` reference is considered higher > information than a `name + digest` reference since a > registry may be used to resolve the digest from a > `name + tag` reference. Co-Authored-by: Derek McGowan <derek@mcg.dev> Co-Authored-by: Maksym Pavlenko <pavlenko.maksym@gmail.com> Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
/*
|
|
Copyright The containerd Authors.
|
|
|
|
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 reference
|
|
|
|
import (
|
|
"io"
|
|
"math/rand"
|
|
"testing"
|
|
|
|
"github.com/opencontainers/go-digest"
|
|
)
|
|
|
|
func TestReferenceSorting(t *testing.T) {
|
|
digested := func(seed int64) string {
|
|
b, err := io.ReadAll(io.LimitReader(rand.New(rand.NewSource(seed)), 64))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return digest.FromBytes(b).String()
|
|
}
|
|
// Add z. prefix to string sort after "sha256:"
|
|
r1 := func(name, tag string, seed int64) string {
|
|
return "z.containerd.io/" + name + ":" + tag + "@" + digested(seed)
|
|
}
|
|
r2 := func(name, tag string) string {
|
|
return "z.containerd.io/" + name + ":" + tag
|
|
}
|
|
r3 := func(name string, seed int64) string {
|
|
return "z.containerd.io/" + name + "@" + digested(seed)
|
|
}
|
|
|
|
for i, tc := range []struct {
|
|
unsorted []string
|
|
expected []string
|
|
}{
|
|
{
|
|
unsorted: []string{r2("name", "latest"), r3("name", 1), r1("name", "latest", 1)},
|
|
expected: []string{r1("name", "latest", 1), r2("name", "latest"), r3("name", 1)},
|
|
},
|
|
{
|
|
unsorted: []string{"can't parse this:latest", r3("name", 1), r2("name", "latest")},
|
|
expected: []string{r2("name", "latest"), r3("name", 1), "can't parse this:latest"},
|
|
},
|
|
{
|
|
unsorted: []string{digested(1), r3("name", 1), r2("name", "latest")},
|
|
expected: []string{r2("name", "latest"), r3("name", 1), digested(1)},
|
|
},
|
|
{
|
|
unsorted: []string{r2("name", "tag2"), r2("name", "tag3"), r2("name", "tag1")},
|
|
expected: []string{r2("name", "tag1"), r2("name", "tag2"), r2("name", "tag3")},
|
|
},
|
|
{
|
|
unsorted: []string{r2("name-2", "tag"), r2("name-3", "tag"), r2("name-1", "tag")},
|
|
expected: []string{r2("name-1", "tag"), r2("name-2", "tag"), r2("name-3", "tag")},
|
|
},
|
|
} {
|
|
sorted := Sort(tc.unsorted)
|
|
if len(sorted) != len(tc.expected) {
|
|
t.Errorf("[%d]: Mismatched sized, got %d, expected %d", i, len(sorted), len(tc.expected))
|
|
continue
|
|
}
|
|
for j := range sorted {
|
|
if sorted[j] != tc.expected[j] {
|
|
t.Errorf("[%d]: Wrong value at %d, got %q, expected %q", i, j, sorted[j], tc.expected[j])
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|