smoke: replaces the io/ioutil API which was deprecated in go 1.19

Signed-off-by: Qinqi Qu <quqinqi@linux.alibaba.com>

contrib/nydusify/cmd/nydusify_test.go

@@ -6,7 +6,6 @@ package main
 
 import (
 	"encoding/json"
-	"io/ioutil"
 	"os"
 	"testing"
 
@@ -50,7 +49,7 @@ func TestParseBackendConfig(t *testing.T) {
 	}`
 	require.True(t, json.Valid([]byte(configJSON)))
 
-	file, err := ioutil.TempFile("", "nydusify-backend-config-test.json")
+	file, err := os.CreateTemp("", "nydusify-backend-config-test.json")
 	require.NoError(t, err)
 	defer os.RemoveAll(file.Name())
 

smoke/tests/api_test.go

@@ -7,7 +7,7 @@ package tests
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"os"
 	"path/filepath"
 	"testing"
@@ -231,7 +231,7 @@ func (a *APIV1TestSuite) visit(path string) error {
 	}
 	defer f.Close()
 
-	ioutil.ReadAll(f)
+	io.ReadAll(f)
 
 	return nil
 }

smoke/tests/blobcache_test.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -47,7 +46,7 @@ func (a *BlobCacheTestSuite) prepareTestEnv(t *testing.T) (*tool.Context, string
 	rootfsReader := rootFs.ToOCITar(t)
 
 	ociBlobDigester := digest.Canonical.Digester()
-	ociBlob, err := ioutil.TempFile(ctx.Env.BlobDir, "oci-blob-")
+	ociBlob, err := os.CreateTemp(ctx.Env.BlobDir, "oci-blob-")
 	require.NoError(t, err)
 
 	_, err = io.Copy(io.MultiWriter(ociBlobDigester.Hash(), ociBlob), rootfsReader)

smoke/tests/tool/context.go

@@ -5,7 +5,6 @@
 package tool
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"testing"
@@ -86,7 +85,7 @@ func (ctx *Context) PrepareWorkDir(t *testing.T) {
 	if tempDir == "" {
 		tempDir = os.TempDir()
 	}
-	workDir, err := ioutil.TempDir(tempDir, "nydus-smoke-")
+	workDir, err := os.MkdirTemp(tempDir, "nydus-smoke-")
 	require.NoError(t, err)
 
 	blobDir := filepath.Join(workDir, "blobs")

smoke/tests/tool/layer.go

@@ -10,7 +10,6 @@ import (
 	"context"
 	"crypto/rand"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -121,7 +120,7 @@ func (l *Layer) Pack(t *testing.T, packOption converter.PackOption, blobDir stri
 	l.recordFileTree(t)
 
 	// Pack OCI tar to nydus native blob
-	blob, err := ioutil.TempFile(blobDir, "blob-")
+	blob, err := os.CreateTemp(blobDir, "blob-")
 	require.NoError(t, err)
 	defer blob.Close()
 	blobDigester := digest.Canonical.Digester()
@@ -160,7 +159,7 @@ func (l *Layer) PackRef(t *testing.T, ctx Context, blobDir string, compress bool
 	}
 
 	// Pack OCI blob to nydus zran blob
-	rafsBlob, err := ioutil.TempFile(blobDir, "rafs-blob-")
+	rafsBlob, err := os.CreateTemp(blobDir, "rafs-blob-")
 	require.NoError(t, err)
 	defer rafsBlob.Close()
 	rafsBlobDigester := digest.Canonical.Digester()
@@ -172,7 +171,7 @@ func (l *Layer) PackRef(t *testing.T, ctx Context, blobDir string, compress bool
 	require.NoError(t, err)
 
 	ociBlobDigester := digest.Canonical.Digester()
-	ociBlob, err := ioutil.TempFile(blobDir, "oci-blob-")
+	ociBlob, err := os.CreateTemp(blobDir, "oci-blob-")
 	require.NoError(t, err)
 
 	_, err = io.Copy(io.MultiWriter(twc, ociBlobDigester.Hash(), ociBlob), ociBlobReader)
@@ -250,7 +249,7 @@ func MergeLayers(t *testing.T, ctx Context, mergeOption converter.MergeOption, l
 		layers[idx].ReaderAt = ra
 	}
 
-	bootstrap, err := ioutil.TempFile(ctx.Env.WorkDir, "bootstrap-")
+	bootstrap, err := os.CreateTemp(ctx.Env.WorkDir, "bootstrap-")
 	require.NoError(t, err)
 	defer bootstrap.Close()
 	actualDigests, err := converter.Merge(context.Background(), layers, bootstrap, mergeOption)

smoke/tests/tool/nydusd.go

@@ -10,7 +10,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"os"
@@ -246,7 +245,7 @@ func (nydusd *Nydusd) MountByAPI(config NydusdConfig) error {
 		return err
 	}
 	defer f.Close()
-	rafsConfig, err := ioutil.ReadAll(f)
+	rafsConfig, err := io.ReadAll(f)
 	if err != nil {
 		return err
 	}