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package cache
import (
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
"testing"
"time"
promtest "github.com/prometheus/client_golang/prometheus/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"gitlab.com/gitlab-org/gitaly/internal/gitaly/config"
"gitlab.com/gitlab-org/gitaly/internal/tempdir"
"gitlab.com/gitlab-org/gitaly/internal/testhelper"
"gitlab.com/gitlab-org/gitaly/internal/testhelper/testcfg"
)
func TestDiskCacheObjectWalker(t *testing.T) {
cfg := testcfg.Build(t)
var shouldExist, shouldNotExist []string
for _, tt := range []struct {
name string
age time.Duration
expectRemoval bool
}{
{"0f/oldey", time.Hour, true},
{"90/n00b", time.Minute, false},
{"2b/ancient", 24 * time.Hour, true},
{"cd/baby", time.Second, false},
} {
cacheDir := tempdir.CacheDir(cfg.Storages[0])
path := filepath.Join(cacheDir, tt.name)
require.NoError(t, os.MkdirAll(filepath.Dir(path), 0755))
f, err := os.Create(path)
require.NoError(t, err)
require.NoError(t, f.Close())
require.NoError(t, os.Chtimes(path, time.Now(), time.Now().Add(-1*tt.age)))
if tt.expectRemoval {
shouldNotExist = append(shouldNotExist, path)
} else {
shouldExist = append(shouldExist, path)
}
}
locator := config.NewLocator(cfg)
cache := New(cfg, locator, withDisabledMoveAndClear())
require.NoError(t, cache.StartWalkers())
pollCountersUntil(t, cache, 4)
for _, p := range shouldExist {
assert.FileExists(t, p)
}
for _, p := range shouldNotExist {
require.NoFileExists(t, p)
}
}
func TestDiskCacheInitialClear(t *testing.T) {
cfg := testcfg.Build(t)
cacheDir := tempdir.CacheDir(cfg.Storages[0])
canary := filepath.Join(cacheDir, "canary.txt")
require.NoError(t, os.MkdirAll(filepath.Dir(canary), 0755))
require.NoError(t, ioutil.WriteFile(canary, []byte("chirp chirp"), 0755))
locator := config.NewLocator(cfg)
cache := New(cfg, locator, withDisabledWalker())
require.NoError(t, cache.StartWalkers())
require.NoFileExists(t, canary)
}
func pollCountersUntil(t testing.TB, cache *Cache, expectRemovals int) {
// poll injected mock prometheus counters until expected events occur
timeout := time.After(time.Second)
for {
count := int(promtest.ToFloat64(cache.walkerRemovalTotal))
select {
case <-timeout:
t.Fatalf(
"timed out polling prometheus stats; removals: %d",
count,
)
default:
// keep on truckin'
}
if count == expectRemovals {
break
}
time.Sleep(time.Millisecond)
}
}
func TestCleanWalkDirNotExists(t *testing.T) {
cfg := testcfg.Build(t)
cache := New(cfg, config.NewLocator(cfg))
err := cache.cleanWalk("/path/that/does/not/exist")
assert.NoError(t, err, "cleanWalk returned an error for a non existing directory")
}
func TestCleanWalkEmptyDirs(t *testing.T) {
tmp := testhelper.TempDir(t)
for _, tt := range []struct {
path string
stale bool
}{
{path: "a/b/c/"},
{path: "a/b/c/1", stale: true},
{path: "a/b/c/2", stale: true},
{path: "a/b/d/"},
{path: "e/"},
{path: "e/1"},
{path: "f/"},
} {
p := filepath.Join(tmp, tt.path)
if strings.HasSuffix(tt.path, "/") {
require.NoError(t, os.MkdirAll(p, 0755))
} else {
require.NoError(t, ioutil.WriteFile(p, nil, 0655))
if tt.stale {
require.NoError(t, os.Chtimes(p, time.Now(), time.Now().Add(-time.Hour)))
}
}
}
cfg := testcfg.Build(t)
cache := New(cfg, config.NewLocator(cfg))
require.NoError(t, cache.cleanWalk(tmp))
actual := findFiles(t, tmp)
expect := `.
./e
./e/1
`
require.Equal(t, expect, actual)
}
func findFiles(t testing.TB, path string) string {
cmd := exec.Command("find", ".")
cmd.Dir = path
out, err := cmd.Output()
require.NoError(t, err)
return string(out)
}
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