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// 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 partial
import (
"fmt"
"io"
"testing"
v1 "github.com/google/go-containerregistry/pkg/v1"
"github.com/google/go-containerregistry/pkg/v1/types"
)
type testUIC struct {
UncompressedImageCore
configFile []byte
}
func (t testUIC) RawConfigFile() ([]byte, error) {
return t.configFile, nil
}
type testCIC struct {
CompressedImageCore
configFile []byte
}
func (t testCIC) LayerByDigest(h v1.Hash) (CompressedLayer, error) {
return nil, fmt.Errorf("no layer by diff ID %v", h)
}
func (t testCIC) RawConfigFile() ([]byte, error) {
return t.configFile, nil
}
func TestConfigLayer(t *testing.T) {
cases := []v1.Image{
&compressedImageExtender{
CompressedImageCore: testCIC{
configFile: []byte("{}"),
},
},
&uncompressedImageExtender{
UncompressedImageCore: testUIC{
configFile: []byte("{}"),
},
},
}
for _, image := range cases {
hash, err := image.ConfigName()
if err != nil {
t.Fatalf("Error getting config name: %v", err)
}
if _, err := image.LayerByDigest(hash); err == nil {
t.Error("LayerByDigest(config hash) returned nil error, wanted error")
}
layer, err := ConfigLayer(image)
if err != nil {
t.Fatalf("ConfigLayer: %v", err)
}
lr, err := layer.Uncompressed()
if err != nil {
t.Fatalf("Error getting uncompressed layer: %v", err)
}
zr, err := layer.Compressed()
if err != nil {
t.Fatalf("Error getting compressed layer: %v", err)
}
cfgLayerBytes, err := io.ReadAll(lr)
if err != nil {
t.Fatalf("Error reading config layer bytes: %v", err)
}
zcfgLayerBytes, err := io.ReadAll(zr)
if err != nil {
t.Fatalf("Error reading config layer bytes: %v", err)
}
cfgFile, err := image.RawConfigFile()
if err != nil {
t.Fatalf("Error getting raw config file: %v", err)
}
if string(cfgFile) != string(cfgLayerBytes) {
t.Errorf("Config file layer doesn't match raw config file")
}
if string(cfgFile) != string(zcfgLayerBytes) {
t.Errorf("Config file layer doesn't match raw config file")
}
size, err := layer.Size()
if err != nil {
t.Fatalf("Error getting config layer size: %v", err)
}
if size != int64(len(cfgFile)) {
t.Errorf("Size() = %d, want %d", size, len(cfgFile))
}
digest, err := layer.Digest()
if err != nil {
t.Fatalf("Digest() = %v", err)
}
if digest != hash {
t.Errorf("ConfigLayer().Digest() != ConfigName(); %v, %v", digest, hash)
}
diffid, err := layer.DiffID()
if err != nil {
t.Fatalf("DiffId() = %v", err)
}
if diffid != hash {
t.Errorf("ConfigLayer().DiffID() != ConfigName(); %v, %v", diffid, hash)
}
mt, err := layer.MediaType()
if err != nil {
t.Fatalf("Error getting config layer media type: %v", err)
}
if mt != types.OCIConfigJSON {
t.Errorf("MediaType() = %v, want %v", mt, types.OCIConfigJSON)
}
}
}
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