open-consul/command/snapshot/save/snapshot_save_test.go

201 lines
4.5 KiB
Go

package save
import (
"crypto/rand"
"fmt"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"strings"
"sync/atomic"
"testing"
"github.com/hashicorp/consul/agent"
"github.com/hashicorp/consul/api"
"github.com/hashicorp/consul/lib"
"github.com/hashicorp/consul/sdk/testutil"
"github.com/hashicorp/consul/sdk/testutil/retry"
"github.com/mitchellh/cli"
"github.com/stretchr/testify/require"
)
func TestSnapshotSaveCommand_noTabs(t *testing.T) {
t.Parallel()
if strings.ContainsRune(New(cli.NewMockUi()).Help(), '\t') {
t.Fatal("help has tabs")
}
}
func TestSnapshotSaveCommand_Validation(t *testing.T) {
t.Parallel()
cases := map[string]struct {
args []string
output string
}{
"no file": {
[]string{},
"Missing FILE argument",
},
"extra args": {
[]string{"foo", "bar", "baz"},
"Too many arguments",
},
}
for name, tc := range cases {
ui := cli.NewMockUi()
c := New(ui)
// Ensure our buffer is always clear
if ui.ErrorWriter != nil {
ui.ErrorWriter.Reset()
}
if ui.OutputWriter != nil {
ui.OutputWriter.Reset()
}
code := c.Run(tc.args)
if code == 0 {
t.Errorf("%s: expected non-zero exit", name)
}
output := ui.ErrorWriter.String()
if !strings.Contains(output, tc.output) {
t.Errorf("%s: expected %q to contain %q", name, output, tc.output)
}
}
}
func TestSnapshotSaveCommand(t *testing.T) {
t.Parallel()
a := agent.NewTestAgent(t, ``)
defer a.Shutdown()
client := a.Client()
ui := cli.NewMockUi()
c := New(ui)
dir := testutil.TempDir(t, "snapshot")
defer os.RemoveAll(dir)
file := filepath.Join(dir, "backup.tgz")
args := []string{
"-http-addr=" + a.HTTPAddr(),
file,
}
code := c.Run(args)
if code != 0 {
t.Fatalf("bad: %d. %#v", code, ui.ErrorWriter.String())
}
f, err := os.Open(file)
if err != nil {
t.Fatalf("err: %v", err)
}
defer f.Close()
if err := client.Snapshot().Restore(nil, f); err != nil {
t.Fatalf("err: %v", err)
}
}
func TestSnapshotSaveCommand_TruncatedStream(t *testing.T) {
t.Parallel()
a := agent.NewTestAgent(t, ``)
defer a.Shutdown()
client := a.Client()
// Seed it with 64K of random data just so we have something to work with.
{
blob := make([]byte, 64*1024)
_, err := rand.Read(blob)
require.NoError(t, err)
_, err = client.KV().Put(&api.KVPair{Key: "blob", Value: blob}, nil)
require.NoError(t, err)
}
// Do a manual snapshot so we can send back roughly reasonable data.
var inputData []byte
{
rc, _, err := client.Snapshot().Save(nil)
require.NoError(t, err)
defer rc.Close()
inputData, err = ioutil.ReadAll(rc)
require.NoError(t, err)
}
var fakeResult atomic.Value
// Run a fake webserver to pretend to be the snapshot API.
fakeAddr := lib.StartTestServer(t, http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
if req.URL.Path != "/v1/snapshot" {
w.WriteHeader(http.StatusNotFound)
return
}
if req.Method != "GET" {
w.WriteHeader(http.StatusMethodNotAllowed)
return
}
raw := fakeResult.Load()
if raw == nil {
w.WriteHeader(http.StatusNotFound)
return
}
data := raw.([]byte)
_, _ = w.Write(data)
}))
// Wait until the server is actually listening.
retry.Run(t, func(r *retry.R) {
resp, err := http.Get("http://" + fakeAddr + "/not-real")
require.NoError(r, err)
require.Equal(r, http.StatusNotFound, resp.StatusCode)
})
dir := testutil.TempDir(t, "snapshot")
defer os.RemoveAll(dir)
for _, removeBytes := range []int{200, 16, 8, 4, 2, 1} {
t.Run(fmt.Sprintf("truncate %d bytes from end", removeBytes), func(t *testing.T) {
// Lop off part of the end.
data := inputData[0 : len(inputData)-removeBytes]
fakeResult.Store(data)
ui := cli.NewMockUi()
c := New(ui)
file := filepath.Join(dir, "backup.tgz")
args := []string{
"-http-addr=" + fakeAddr, // point to the fake
file,
}
code := c.Run(args)
require.Equal(t, 1, code, "expected non-zero exit")
output := ui.ErrorWriter.String()
require.Contains(t, output, "Error verifying snapshot file")
require.Contains(t, output, "EOF")
// file should not have been created
_, err := os.Stat(file)
require.Error(t, err, "file is not supposed to exist")
require.True(t, os.IsNotExist(err), "file is not supposed to exist")
// also check that the unverified inputs are gone as well
_, err = os.Stat(file + ".unverified")
require.Error(t, err, "unverified file is not supposed to exist")
require.True(t, os.IsNotExist(err), "unverified file is not supposed to exist")
})
}
}