Merge pull request #6658 from gabriel-samfira/use-temp-file-for-import-export-test

Use temp file for export/import test

integration/client/export_test.go

@@ -18,8 +18,9 @@ package client
 
 import (
 	"archive/tar"
-	"bytes"
 	"io"
+	"io/ioutil"
+	"os"
 	"testing"
 
 	. "github.com/containerd/containerd"
@@ -45,12 +46,23 @@ func TestExport(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	wb := bytes.NewBuffer(nil)
+	dstFile, err := ioutil.TempFile("", "export-import-test")
-	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()))
+	defer func() {
+		dstFile.Close()
+		os.Remove(dstFile.Name())
+	}()
+
+	err = client.Export(ctx, dstFile, archive.WithPlatform(platforms.Default()), archive.WithImage(client.ImageService(), testImage))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Seet to begining of file before passing it to assertOCITar()
+	dstFile.Seek(0, 0)
+	assertOCITar(t, dstFile)
 }
 
 func assertOCITar(t *testing.T, r io.Reader) {

integration/client/import_test.go

@@ -21,6 +21,8 @@ import (
 	"context"
 	"encoding/json"
 	"io"
+	"io/ioutil"
+	"os"
 
 	"math/rand"
 	"reflect"
@@ -74,18 +76,30 @@ func testExportImport(t *testing.T, imageName string) {
 		t.Fatal(err)
 	}
 
-	wb := bytes.NewBuffer(nil)
+	dstFile, err := ioutil.TempFile("", "export-import-test")
-	err = client.Export(ctx, wb, archive.WithPlatform(platforms.Default()), archive.WithImage(client.ImageService(), imageName))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer func() {
+		dstFile.Close()
+		os.Remove(dstFile.Name())
+	}()
+
+	err = client.Export(ctx, dstFile, archive.WithPlatform(platforms.Default()), archive.WithImage(client.ImageService(), imageName))
 	if err != nil {
 		t.Fatal(err)
 	}
 
 	client.ImageService().Delete(ctx, imageName)
 
+	// Seek to beginning of file in preparation for Import()
+	dstFile.Seek(0, 0)
+
 	opts := []ImportOpt{
 		WithImageRefTranslator(archive.AddRefPrefix("foo/bar")),
 	}
-	imgrecs, err := client.Import(ctx, bytes.NewReader(wb.Bytes()), opts...)
+
+	imgrecs, err := client.Import(ctx, dstFile, opts...)
 	if err != nil {
 		t.Fatalf("Import failed: %+v", err)
 	}