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package bitcask
import (
"os"
"testing"
"github.com/stretchr/testify/assert"
)
func createTmpdir(t *testing.T) (dir string, closer func()) {
dir = t.TempDir()
closer = func() {
os.RemoveAll(dir)
}
return
}
func TestManifest_NewManifest(t *testing.T) {
dir, closer := createTmpdir(t)
defer closer()
manifest, err := NewManifest(dir)
assert.Nil(t, err)
defer manifest.Close()
assert.Equal(t, manifest.fid, uint64(1))
assert.Equal(t, manifest.nextFid, uint64(3))
assert.Equal(t, manifest.NextFid(), uint64(3))
active := manifest.ActiveWal()
assert.NotNil(t, active)
assert.Equal(t, active.Fid(), uint64(2))
assert.True(t, manifest.FileSize() > 0)
}
func TestManifest_LoadManifest(t *testing.T) {
dir, closer := createTmpdir(t)
defer closer()
manifest, err := NewManifest(dir)
assert.Nil(t, err)
manifest.Close()
// load the previous manifest
manifest, err = LoadManifest(dir)
assert.Nil(t, err)
defer manifest.Close()
assert.Equal(t, manifest.fid, uint64(1))
assert.Equal(t, manifest.nextFid, uint64(3))
active := manifest.ActiveWal()
assert.NotNil(t, active)
assert.Equal(t, active.Fid(), uint64(2))
assert.True(t, manifest.FileSize() > 0)
}
func TestManifest_RotateWal(t *testing.T) {
dir, closer := createTmpdir(t)
defer closer()
manifest, err := NewManifest(dir)
assert.Nil(t, err)
defer manifest.Close()
old, err := manifest.RotateWal()
assert.Nil(t, err)
assert.Equal(t, old.Fid(), uint64(2))
assert.Equal(t, old.refs.Load(), int64(1))
active := manifest.ActiveWal()
assert.NotNil(t, active)
assert.Equal(t, active.refs.Load(), int64(1))
assert.Equal(t, manifest.nextFid, uint64(4))
}
func TestManifest_RotateManifest(t *testing.T) {
dir, closer := createTmpdir(t)
defer closer()
manifest, err := NewManifest(dir)
assert.Nil(t, err)
defer manifest.Close()
assert.Equal(t, manifest.fid, uint64(1))
err = manifest.RotateManifest()
assert.Nil(t, err)
assert.Equal(t, manifest.fid, uint64(3))
assert.Equal(t, manifest.nextFid, uint64(4))
}
func TestManifest_Apply(t *testing.T) {
dir, closer := createTmpdir(t)
defer closer()
manifest, err := NewManifest(dir)
assert.Nil(t, err)
active := manifest.ActiveWal()
assert.Equal(t, active.refs.Load(), int64(1))
assert.Equal(t, active.Fid(), uint64(2))
defer manifest.Close()
wal3, err := NewWal(WalPath(dir, 3), 3, -1)
assert.Nil(t, err)
wal4, err := NewWal(WalPath(dir, 4), 4, -1)
assert.Nil(t, err)
wal5, err := NewWal(WalPath(dir, 5), 5, -1)
assert.Nil(t, err)
// apply
edit1 := &ManifestEdit{
addFiles: []LogFile{
{fid: 3, wal: wal3},
{fid: 4, wal: wal4},
{fid: 5, wal: wal5},
},
hasNextFid: true,
nextFid: 6,
}
assert.Nil(t, manifest.Apply(edit1))
assert.Equal(t, wal3.refs.Load(), int64(2))
assert.Equal(t, wal4.refs.Load(), int64(2))
assert.Equal(t, wal5.refs.Load(), int64(2))
edit2 := &ManifestEdit{
deleteFiles: []LogFile{{fid: 4}, {fid: 5}},
}
assert.Nil(t, manifest.Apply(edit2))
assert.Equal(t, wal3.refs.Load(), int64(2))
assert.Equal(t, wal4.refs.Load(), int64(1))
assert.Equal(t, wal5.refs.Load(), int64(1))
assert.Nil(t, manifest.ToWal(4))
assert.Nil(t, manifest.ToWal(5))
assert.NotNil(t, manifest.ToWal(3))
assert.NotNil(t, manifest.ToWal(2))
assert.Equal(t, manifest.nextFid, uint64(6))
}
func TestManifest_LogAndApply(t *testing.T) {
dir, closer := createTmpdir(t)
defer closer()
manifest, err := NewManifest(dir)
assert.Nil(t, err)
wal3, err := NewWal(WalPath(dir, 3), 3, -1)
assert.Nil(t, err)
wal4, err := NewWal(WalPath(dir, 4), 4, -1)
assert.Nil(t, err)
wal5, err := NewWal(WalPath(dir, 5), 5, -1)
assert.Nil(t, err)
// apply
edit1 := &ManifestEdit{
addFiles: []LogFile{
{fid: 3, wal: wal3},
{fid: 4, wal: wal4},
{fid: 5, wal: wal5},
},
hasNextFid: true,
nextFid: 6,
}
assert.Nil(t, manifest.LogAndApply(edit1))
assert.Equal(t, wal3.refs.Load(), int64(2))
assert.Equal(t, wal4.refs.Load(), int64(2))
assert.Equal(t, wal5.refs.Load(), int64(2))
edit2 := &ManifestEdit{
deleteFiles: []LogFile{{fid: 4}, {fid: 5}},
}
assert.Nil(t, manifest.LogAndApply(edit2))
assert.Equal(t, wal3.refs.Load(), int64(2))
assert.Equal(t, wal4.refs.Load(), int64(1))
assert.Equal(t, wal5.refs.Load(), int64(1))
// re-open manifest
manifest.Close() // all referenced wals will be closed
manifest, err = LoadManifest(dir)
assert.Nil(t, err)
// check
assert.Nil(t, manifest.ToWal(4))
assert.Nil(t, manifest.ToWal(5))
wal2 := manifest.ToWal(2)
assert.NotNil(t, wal2)
assert.Equal(t, wal2.refs.Load(), int64(1))
wal3 = manifest.ToWal(3)
assert.NotNil(t, wal3)
assert.Equal(t, wal3.refs.Load(), int64(1))
assert.Equal(t, manifest.nextFid, uint64(6))
}