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// Copyright 2023 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 remote
import (
"bytes"
"encoding/json"
"fmt"
"io"
"log"
"net/http/httptest"
"net/url"
"testing"
"github.com/google/go-containerregistry/pkg/name"
"github.com/google/go-containerregistry/pkg/registry"
v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/mutate"
"github.com/google/go-containerregistry/pkg/v1/random"
"github.com/google/go-containerregistry/pkg/v1/types"
)
var fatal = log.Fatal
var helper = func() {}
func must[T any](t T, err error) T {
helper()
if err != nil {
fatal(err)
}
return t
}
type fakeSchema1 struct {
b []byte
}
func (f *fakeSchema1) MediaType() (types.MediaType, error) {
return types.DockerManifestSchema1, nil
}
func (f *fakeSchema1) RawManifest() ([]byte, error) {
return f.b, nil
}
func toSchema1(t *testing.T, img v1.Image) *fakeSchema1 {
t.Helper()
fsl := []fslayer{}
layers := must(img.Layers())
for i := len(layers) - 1; i >= 0; i-- {
l := layers[i]
dig := must(l.Digest())
fsl = append(fsl, fslayer{
BlobSum: dig.String(),
})
}
return &fakeSchema1{
b: must(json.Marshal(&schema1Manifest{FSLayers: fsl})),
}
}
func TestSchema1(t *testing.T) {
fatal = t.Fatal
helper = t.Helper
rnd := must(random.Image(1024, 3))
s1 := toSchema1(t, rnd)
// Set up a fake registry.
s := httptest.NewServer(registry.New())
defer s.Close()
u := must(url.Parse(s.URL))
dst := fmt.Sprintf("%s/test/foreign/upload", u.Host)
ref := must(name.ParseReference(dst))
if err := Write(ref, rnd); err != nil {
t.Fatal(err)
}
tag := ref.Context().Tag("schema1")
if err := Put(tag, s1); err != nil {
t.Fatal(err)
}
pulled := must(Get(tag))
img := must(pulled.Schema1())
if err := Write(ref.Context().Tag("repushed"), img); err != nil {
t.Fatal(err)
}
mustErr := func(a any, err error) {
t.Helper()
if err == nil {
t.Fatalf("should have failed, got %T", a)
}
}
mustErr(img.ConfigFile())
mustErr(img.Manifest())
mustErr(img.LayerByDiffID(v1.Hash{}))
h, sz, err := v1.SHA256(bytes.NewReader(s1.b))
if err != nil {
t.Fatal(err)
}
if got, want := must(img.Size()), sz; got != want {
t.Errorf("Size(): got %d, want %d", got, want)
}
if got, want := must(img.Digest()), h; got != want {
t.Errorf("Digest(): got %s, want %s", got, want)
}
if got, want := must(io.ReadAll(mutate.Extract(img))), must(io.ReadAll(mutate.Extract(rnd))); !bytes.Equal(got, want) {
t.Error("filesystems are different")
}
}
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