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export_test.go
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export_test.go
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/*
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 containerd
import (
"archive/tar"
"bytes"
"io"
"runtime"
"testing"
"github.com/containerd/containerd/images/archive"
"github.com/containerd/containerd/platforms"
)
// TestExport exports testImage as a tar stream
func TestExport(t *testing.T) {
// TODO: support windows
if testing.Short() || runtime.GOOS == "windows" {
t.Skip()
}
ctx, cancel := testContext(t)
defer cancel()
client, err := New(address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
_, err = client.Fetch(ctx, testImage)
if err != nil {
t.Fatal(err)
}
wb := bytes.NewBuffer(nil)
err = client.Export(ctx, wb, archive.WithPlatform(platforms.Default()), archive.WithImage(client.ImageService(), testImage))
if err != nil {
t.Fatal(err)
}
assertOCITar(t, bytes.NewReader(wb.Bytes()))
}
func assertOCITar(t *testing.T, r io.Reader) {
// TODO: add more assertion
tr := tar.NewReader(r)
foundOCILayout := false
foundIndexJSON := false
for {
h, err := tr.Next()
if err == io.EOF {
break
}
if err != nil {
t.Error(err)
continue
}
if h.Name == "oci-layout" {
foundOCILayout = true
}
if h.Name == "index.json" {
foundIndexJSON = true
}
}
if !foundOCILayout {
t.Error("oci-layout not found")
}
if !foundIndexJSON {
t.Error("index.json not found")
}
}