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package hdfs
import (
"fmt"
"io/ioutil"
"os"
"os/user"
"path/filepath"
"testing"
"github.com/colinmarc/hdfs/v2/hadoopconf"
krb "github.com/jcmturner/gokrb5/v8/client"
"github.com/jcmturner/gokrb5/v8/config"
"github.com/jcmturner/gokrb5/v8/credentials"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var cachedClients = make(map[string]*Client)
func getClient(t *testing.T) *Client {
return getClientForUser(t, "gohdfs1")
}
func getClientForSuperUser(t *testing.T) *Client {
u, err := user.Current()
if err != nil {
t.Fatal(err)
}
return getClientForUser(t, u.Username)
}
func getClientForUser(t *testing.T, username string) *Client {
if c, ok := cachedClients[username]; ok {
return c
}
conf, err := hadoopconf.LoadFromEnvironment()
if err != nil || conf == nil {
t.Fatal("Couldn't load ambient config", err)
}
options := ClientOptionsFromConf(conf)
if options.Addresses == nil {
t.Fatal("Missing namenode addresses in ambient config")
}
if options.KerberosClient != nil {
options.KerberosClient = getKerberosClient(t, username)
} else {
options.User = username
}
client, err := NewClient(options)
if err != nil {
t.Fatal(err)
}
cachedClients[username] = client
return client
}
// getKerberosClient expects a ccache file for each user mentioned in the tests
// to live at /tmp/krb5cc_gohdfs_<username>, and krb5.conf to live at
// /etc/krb5.conf
func getKerberosClient(t *testing.T, username string) *krb.Client {
cfg, err := config.Load("/etc/krb5.conf")
if err != nil {
t.Skip("Couldn't load krb config:", err)
}
ccache, err := credentials.LoadCCache(fmt.Sprintf("/tmp/krb5cc_gohdfs_%s", username))
if err != nil {
t.Skipf("Couldn't load keytab for user %s: %s", username, err)
}
client, err := krb.NewFromCCache(ccache, cfg)
if err != nil {
t.Fatal("Couldn't initialize krb client:", err)
}
return client
}
func touch(t *testing.T, path string) {
touchMask(t, path, 0)
}
func touchMask(t *testing.T, path string, mask os.FileMode) {
c := getClient(t)
err := c.RemoveAll(path)
if err != nil && !os.IsNotExist(err) {
t.Fatal(err)
}
err = c.CreateEmptyFile(path)
if err != nil && !os.IsExist(err) {
t.Fatal(err)
}
if mask != 0 {
err = c.Chmod(path, mask)
if err != nil {
t.Fatal(err)
}
}
}
func mkdirp(t *testing.T, path string) {
mkdirpMask(t, path, 0755)
}
func mkdirpMask(t *testing.T, path string, mask os.FileMode) {
c := getClient(t)
err := c.RemoveAll(path)
if err != nil && !os.IsNotExist(err) {
t.Fatal(err)
}
err = c.MkdirAll(path, mask)
if err != nil && !os.IsExist(err) {
t.Fatal(err)
}
}
func baleet(t *testing.T, path string) {
c := getClient(t)
err := c.RemoveAll(path)
if err != nil && !os.IsNotExist(err) {
t.Fatal(err)
}
}
func assertPathError(t *testing.T, err error, op, path string, wrappedErr error) {
require.NotNil(t, err)
expected := &os.PathError{op, path, wrappedErr}
require.Equal(t, expected.Error(), err.Error())
require.Equal(t, expected, err)
}
func TestNewWithMultipleNodes(t *testing.T) {
conf, err := hadoopconf.LoadFromEnvironment()
if err != nil {
t.Fatal("Couldn't load ambient config", err)
}
nns := conf.Namenodes()
nns = append([]string{"localhost:100"}, nns...)
_, err = NewClient(ClientOptions{Addresses: nns, User: "gohdfs1"})
assert.Nil(t, err)
}
func TestNewWithFailingNode(t *testing.T) {
_, err := New("localhost:100")
assert.NotNil(t, err)
}
func TestReadFile(t *testing.T) {
client := getClient(t)
bytes, err := client.ReadFile("/_test/foo.txt")
assert.NoError(t, err)
assert.EqualValues(t, "bar\n", string(bytes))
}
func TestCopyToLocal(t *testing.T) {
client := getClient(t)
dir, _ := ioutil.TempDir("", "hdfs-test")
tmpfile := filepath.Join(dir, "foo.txt")
err := client.CopyToLocal("/_test/foo.txt", tmpfile)
require.NoError(t, err)
f, err := os.Open(tmpfile)
require.NoError(t, err)
bytes, _ := ioutil.ReadAll(f)
assert.EqualValues(t, "bar\n", string(bytes))
}
func TestCopyToRemote(t *testing.T) {
client := getClient(t)
baleet(t, "/_test/copytoremote.txt")
err := client.CopyToRemote("testdata/foo.txt", "/_test/copytoremote.txt")
ignoreErrReplicating(t, err)
bytes, err := client.ReadFile("/_test/copytoremote.txt")
require.NoError(t, err)
assert.EqualValues(t, "bar\n", string(bytes))
}
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