// Ensure that the store can delete a directory if recursive is specified.
func TestStoreDeleteDiretory(t *testing.T) {
s := newStore()
// create directory /foo
var eidx uint64 = 2
s.Create("/foo", true, "", false, Permanent)
// delete /foo with dir = true and recursive = false
// this should succeed, since the directory is empty
e, err := s.Delete("/foo", true, false)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "delete", "")
// check prevNode
assert.NotNil(t, e.PrevNode, "")
assert.Equal(t, e.PrevNode.Key, "/foo", "")
assert.Equal(t, e.PrevNode.Dir, true, "")
// create directory /foo and directory /foo/bar
s.Create("/foo/bar", true, "", false, Permanent)
// delete /foo with dir = true and recursive = false
// this should fail, since the directory is not empty
_, err = s.Delete("/foo", true, false)
assert.NotNil(t, err, "")
// delete /foo with dir=false and recursive = true
// this should succeed, since recursive implies dir=true
// and recursively delete should be able to delete all
// items under the given directory
e, err = s.Delete("/foo", false, true)
assert.Nil(t, err, "")
assert.Equal(t, e.Action, "delete", "")
}
// Ensure that the store can recover from a previously saved state that includes an expiring key.
func TestStoreRecoverWithExpiration(t *testing.T) {
s := newStore()
s.clock = newFakeClock()
fc := newFakeClock()
var eidx uint64 = 4
s.Create("/foo", true, "", false, Permanent)
s.Create("/foo/x", false, "bar", false, Permanent)
s.Create("/foo/y", false, "baz", false, fc.Now().Add(5*time.Millisecond))
b, err := s.Save()
time.Sleep(10 * time.Millisecond)
s2 := newStore()
s2.clock = fc
s2.Recovery(b)
fc.Advance(600 * time.Millisecond)
s.DeleteExpiredKeys(fc.Now())
e, err := s.Get("/foo/x", false, false)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, *e.Node.Value, "bar", "")
e, err = s.Get("/foo/y", false, false)
assert.NotNil(t, err, "")
assert.Nil(t, e, "")
}
func TestNewStoreWithNamespaces(t *testing.T) {
s := newStore("/0", "/1")
_, err := s.Get("/0", false, false)
assert.Nil(t, err, "")
_, err = s.Get("/1", false, false)
assert.Nil(t, err, "")
}
// Ensure that the store doesn't see hidden key creates without an exact path match in recursive mode.
func TestStoreWatchRecursiveCreateWithHiddenKey(t *testing.T) {
s := newStore()
w, _ := s.Watch("/foo", true, false, 0)
s.Create("/foo/_bar", false, "baz", false, Permanent)
e := nbselect(w.EventChan())
assert.Nil(t, e, "")
w, _ = s.Watch("/foo", true, false, 0)
s.Create("/foo/_baz", true, "", false, Permanent)
e = nbselect(w.EventChan())
assert.Nil(t, e, "")
s.Create("/foo/_baz/quux", false, "quux", false, Permanent)
e = nbselect(w.EventChan())
assert.Nil(t, e, "")
}
// Ensure that the store can watch for key expiration.
func TestStoreWatchExpire(t *testing.T) {
s := newStore()
fc := newFakeClock()
s.clock = fc
var eidx uint64 = 2
s.Create("/foo", false, "bar", false, fc.Now().Add(500*time.Millisecond))
s.Create("/foofoo", false, "barbarbar", false, fc.Now().Add(500*time.Millisecond))
w, _ := s.Watch("/", true, false, 0)
assert.Equal(t, w.StartIndex(), eidx, "")
c := w.EventChan()
e := nbselect(c)
assert.Nil(t, e, "")
fc.Advance(600 * time.Millisecond)
s.DeleteExpiredKeys(fc.Now())
eidx = 3
e = nbselect(c)
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "expire", "")
assert.Equal(t, e.Node.Key, "/foo", "")
w, _ = s.Watch("/", true, false, 4)
eidx = 4
assert.Equal(t, w.StartIndex(), eidx, "")
e = nbselect(w.EventChan())
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "expire", "")
assert.Equal(t, e.Node.Key, "/foofoo", "")
}
// Ensure that the store can retrieve a directory in sorted order.
func TestStoreGetSorted(t *testing.T) {
s := newStore()
s.Create("/foo", true, "", false, Permanent)
s.Create("/foo/x", false, "0", false, Permanent)
s.Create("/foo/z", false, "0", false, Permanent)
s.Create("/foo/y", true, "", false, Permanent)
s.Create("/foo/y/a", false, "0", false, Permanent)
s.Create("/foo/y/b", false, "0", false, Permanent)
var eidx uint64 = 6
e, err := s.Get("/foo", true, true)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
var yNodes NodeExterns
for _, node := range e.Node.Nodes {
switch node.Key {
case "/foo/x":
case "/foo/y":
yNodes = node.Nodes
case "/foo/z":
default:
t.Errorf("key = %s, not matched", node.Key)
}
}
for _, node := range yNodes {
switch node.Key {
case "/foo/y/a":
case "/foo/y/b":
default:
t.Errorf("key = %s, not matched", node.Key)
}
}
}
// Ensure that the store can update a key if it already exists.
func TestStoreUpdateValue(t *testing.T) {
s := newStore()
// create /foo=bar
s.Create("/foo", false, "bar", false, Permanent)
// update /foo="bzr"
var eidx uint64 = 2
e, err := s.Update("/foo", "baz", Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "update", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.False(t, e.Node.Dir, "")
assert.Equal(t, *e.Node.Value, "baz", "")
assert.Equal(t, e.Node.TTL, 0, "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(2), "")
// check prevNode
assert.Equal(t, e.PrevNode.Key, "/foo", "")
assert.Equal(t, *e.PrevNode.Value, "bar", "")
assert.Equal(t, e.PrevNode.TTL, 0, "")
assert.Equal(t, e.PrevNode.ModifiedIndex, uint64(1), "")
e, _ = s.Get("/foo", false, false)
assert.Equal(t, *e.Node.Value, "baz", "")
assert.Equal(t, e.EtcdIndex, eidx, "")
// update /foo=""
eidx = 3
e, err = s.Update("/foo", "", Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "update", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.False(t, e.Node.Dir, "")
assert.Equal(t, *e.Node.Value, "", "")
assert.Equal(t, e.Node.TTL, 0, "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(3), "")
// check prevNode
assert.Equal(t, e.PrevNode.Key, "/foo", "")
assert.Equal(t, *e.PrevNode.Value, "baz", "")
assert.Equal(t, e.PrevNode.TTL, 0, "")
assert.Equal(t, e.PrevNode.ModifiedIndex, uint64(2), "")
e, _ = s.Get("/foo", false, false)
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, *e.Node.Value, "", "")
}
// Ensure that the store cannot delete a directory if both of recursive
// and dir are not specified.
func TestStoreDeleteDiretoryFailsIfNonRecursiveAndDir(t *testing.T) {
s := newStore()
s.Create("/foo", true, "", false, Permanent)
e, _err := s.Delete("/foo", false, false)
err := _err.(*etcdErr.Error)
assert.Equal(t, err.ErrorCode, etcdErr.EcodeNotFile, "")
assert.Equal(t, err.Message, "Not a file", "")
assert.Nil(t, e, "")
}
// Ensure that the store cannot update a directory.
func TestStoreUpdateFailsIfDirectory(t *testing.T) {
s := newStore()
s.Create("/foo", true, "", false, Permanent)
e, _err := s.Update("/foo", "baz", Permanent)
err := _err.(*etcdErr.Error)
assert.Equal(t, err.ErrorCode, etcdErr.EcodeNotFile, "")
assert.Equal(t, err.Message, "Not a file", "")
assert.Equal(t, err.Cause, "/foo", "")
assert.Nil(t, e, "")
}
// Ensure that the store can create a new directory if it doesn't already exist.
func TestStoreCreateDirectory(t *testing.T) {
s := newStore()
var eidx uint64 = 1
e, err := s.Create("/foo", true, "", false, Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "create", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.True(t, e.Node.Dir, "")
}
// Ensure that the store can retrieve an existing value.
func TestStoreGetValue(t *testing.T) {
s := newStore()
s.Create("/foo", false, "bar", false, Permanent)
var eidx uint64 = 1
e, err := s.Get("/foo", false, false)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "get", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.Equal(t, *e.Node.Value, "bar", "")
}
// Ensure that the store doesn't see hidden key updates.
func TestStoreWatchUpdateWithHiddenKey(t *testing.T) {
s := newStore()
s.Create("/_foo", false, "bar", false, Permanent)
w, _ := s.Watch("/_foo", false, false, 0)
s.Update("/_foo", "baz", Permanent)
e := nbselect(w.EventChan())
assert.Equal(t, e.Action, "update", "")
assert.Equal(t, e.Node.Key, "/_foo", "")
e = nbselect(w.EventChan())
assert.Nil(t, e, "")
}
// Ensure that the store can watch for hidden keys as long as it's an exact path match.
func TestStoreWatchCreateWithHiddenKey(t *testing.T) {
s := newStore()
var eidx uint64 = 1
w, _ := s.Watch("/_foo", false, false, 0)
s.Create("/_foo", false, "bar", false, Permanent)
e := nbselect(w.EventChan())
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "create", "")
assert.Equal(t, e.Node.Key, "/_foo", "")
e = nbselect(w.EventChan())
assert.Nil(t, e, "")
}
// Ensure that the store can create a new key if it doesn't already exist.
func TestStoreCreateValue(t *testing.T) {
s := newStore()
// Create /foo=bar
var eidx uint64 = 1
e, err := s.Create("/foo", false, "bar", false, Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "create", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.False(t, e.Node.Dir, "")
assert.Equal(t, *e.Node.Value, "bar", "")
assert.Nil(t, e.Node.Nodes, "")
assert.Nil(t, e.Node.Expiration, "")
assert.Equal(t, e.Node.TTL, 0, "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(1), "")
// Create /empty=""
eidx = 2
e, err = s.Create("/empty", false, "", false, Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "create", "")
assert.Equal(t, e.Node.Key, "/empty", "")
assert.False(t, e.Node.Dir, "")
assert.Equal(t, *e.Node.Value, "", "")
assert.Nil(t, e.Node.Nodes, "")
assert.Nil(t, e.Node.Expiration, "")
assert.Equal(t, e.Node.TTL, 0, "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(2), "")
}
// Ensure that the store cannot conditionally update a key if it has the wrong previous index.
func TestStoreCompareAndSwapPrevIndexFailsIfNotMatch(t *testing.T) {
s := newStore()
var eidx uint64 = 1
s.Create("/foo", false, "bar", false, Permanent)
e, _err := s.CompareAndSwap("/foo", "", 100, "baz", Permanent)
err := _err.(*etcdErr.Error)
assert.Equal(t, err.ErrorCode, etcdErr.EcodeTestFailed, "")
assert.Equal(t, err.Message, "Compare failed", "")
assert.Nil(t, e, "")
e, _ = s.Get("/foo", false, false)
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, *e.Node.Value, "bar", "")
}
// Ensure that the store can delete a value.
func TestStoreDeleteValue(t *testing.T) {
s := newStore()
var eidx uint64 = 2
s.Create("/foo", false, "bar", false, Permanent)
e, err := s.Delete("/foo", false, false)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "delete", "")
// check prevNode
assert.NotNil(t, e.PrevNode, "")
assert.Equal(t, e.PrevNode.Key, "/foo", "")
assert.Equal(t, *e.PrevNode.Value, "bar", "")
}
// Ensure that the store doesn't see expirations of hidden keys.
func TestStoreWatchExpireWithHiddenKey(t *testing.T) {
s := newStore()
fc := newFakeClock()
s.clock = fc
s.Create("/_foo", false, "bar", false, fc.Now().Add(500*time.Millisecond))
s.Create("/foofoo", false, "barbarbar", false, fc.Now().Add(1000*time.Millisecond))
w, _ := s.Watch("/", true, false, 0)
c := w.EventChan()
e := nbselect(c)
assert.Nil(t, e, "")
fc.Advance(600 * time.Millisecond)
s.DeleteExpiredKeys(fc.Now())
e = nbselect(c)
assert.Nil(t, e, "")
fc.Advance(600 * time.Millisecond)
s.DeleteExpiredKeys(fc.Now())
e = nbselect(c)
assert.Equal(t, e.Action, "expire", "")
assert.Equal(t, e.Node.Key, "/foofoo", "")
}
// Ensure that the store fails to create a key if it already exists.
func TestStoreCreateFailsIfExists(t *testing.T) {
s := newStore()
// create /foo as dir
s.Create("/foo", true, "", false, Permanent)
// create /foo as dir again
e, _err := s.Create("/foo", true, "", false, Permanent)
err := _err.(*etcdErr.Error)
assert.Equal(t, err.ErrorCode, etcdErr.EcodeNodeExist, "")
assert.Equal(t, err.Message, "Key already exists", "")
assert.Equal(t, err.Cause, "/foo", "")
assert.Equal(t, err.Index, uint64(1), "")
assert.Nil(t, e, 0, "")
}
func TestStoreCompareAndDeletePrevIndex(t *testing.T) {
s := newStore()
var eidx uint64 = 2
s.Create("/foo", false, "bar", false, Permanent)
e, err := s.CompareAndDelete("/foo", "", 1)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "compareAndDelete", "")
// check pervNode
assert.NotNil(t, e.PrevNode, "")
assert.Equal(t, e.PrevNode.Key, "/foo", "")
assert.Equal(t, *e.PrevNode.Value, "bar", "")
assert.Equal(t, e.PrevNode.ModifiedIndex, uint64(1), "")
assert.Equal(t, e.PrevNode.CreatedIndex, uint64(1), "")
}
// Ensure that the store can recover from a previously saved state.
func TestStoreRecover(t *testing.T) {
s := newStore()
var eidx uint64 = 4
s.Create("/foo", true, "", false, Permanent)
s.Create("/foo/x", false, "bar", false, Permanent)
s.Update("/foo/x", "barbar", Permanent)
s.Create("/foo/y", false, "baz", false, Permanent)
b, err := s.Save()
s2 := newStore()
s2.Recovery(b)
e, err := s.Get("/foo/x", false, false)
assert.Equal(t, e.Node.CreatedIndex, uint64(2), "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(3), "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Nil(t, err, "")
assert.Equal(t, *e.Node.Value, "barbar", "")
e, err = s.Get("/foo/y", false, false)
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Nil(t, err, "")
assert.Equal(t, *e.Node.Value, "baz", "")
}
// Ensure that the store can watch in streaming mode.
func TestStoreWatchStream(t *testing.T) {
s := newStore()
var eidx uint64 = 1
w, _ := s.Watch("/foo", false, true, 0)
// first modification
s.Create("/foo", false, "bar", false, Permanent)
e := nbselect(w.EventChan())
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "create", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.Equal(t, *e.Node.Value, "bar", "")
e = nbselect(w.EventChan())
assert.Nil(t, e, "")
// second modification
eidx = 2
s.Update("/foo", "baz", Permanent)
e = nbselect(w.EventChan())
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "update", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.Equal(t, *e.Node.Value, "baz", "")
e = nbselect(w.EventChan())
assert.Nil(t, e, "")
}
// Ensure that the store can watch for key creation.
func TestStoreWatchCreate(t *testing.T) {
s := newStore()
var eidx uint64 = 0
w, _ := s.Watch("/foo", false, false, 0)
c := w.EventChan()
assert.Equal(t, w.StartIndex(), eidx, "")
s.Create("/foo", false, "bar", false, Permanent)
eidx = 1
e := nbselect(c)
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "create", "")
assert.Equal(t, e.Node.Key, "/foo", "")
e = nbselect(c)
assert.Nil(t, e, "")
}
// Ensure that the store can update the TTL on a value.
func TestStoreUpdateValueTTL(t *testing.T) {
s := newStore()
fc := newFakeClock()
s.clock = fc
var eidx uint64 = 2
s.Create("/foo", false, "bar", false, Permanent)
_, err := s.Update("/foo", "baz", fc.Now().Add(500*time.Millisecond))
e, _ := s.Get("/foo", false, false)
assert.Equal(t, *e.Node.Value, "baz", "")
assert.Equal(t, e.EtcdIndex, eidx, "")
fc.Advance(600 * time.Millisecond)
s.DeleteExpiredKeys(fc.Now())
e, err = s.Get("/foo", false, false)
assert.Nil(t, e, "")
assert.Equal(t, err.(*etcdErr.Error).ErrorCode, etcdErr.EcodeKeyNotFound, "")
}
// Ensure that the store can recrusively retrieve a directory listing.
// Note that hidden files should not be returned.
func TestStoreGetDirectory(t *testing.T) {
s := newStore()
fc := newFakeClock()
s.clock = fc
s.Create("/foo", true, "", false, Permanent)
s.Create("/foo/bar", false, "X", false, Permanent)
s.Create("/foo/_hidden", false, "*", false, Permanent)
s.Create("/foo/baz", true, "", false, Permanent)
s.Create("/foo/baz/bat", false, "Y", false, Permanent)
s.Create("/foo/baz/_hidden", false, "*", false, Permanent)
s.Create("/foo/baz/ttl", false, "Y", false, fc.Now().Add(time.Second*3))
var eidx uint64 = 7
e, err := s.Get("/foo", true, false)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "get", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.Equal(t, len(e.Node.Nodes), 2, "")
var bazNodes NodeExterns
for _, node := range e.Node.Nodes {
switch node.Key {
case "/foo/bar":
assert.Equal(t, *node.Value, "X", "")
assert.Equal(t, node.Dir, false, "")
case "/foo/baz":
assert.Equal(t, node.Dir, true, "")
assert.Equal(t, len(node.Nodes), 2, "")
bazNodes = node.Nodes
default:
t.Errorf("key = %s, not matched", node.Key)
}
}
for _, node := range bazNodes {
switch node.Key {
case "/foo/baz/bat":
assert.Equal(t, *node.Value, "Y", "")
assert.Equal(t, node.Dir, false, "")
case "/foo/baz/ttl":
assert.Equal(t, *node.Value, "Y", "")
assert.Equal(t, node.Dir, false, "")
assert.Equal(t, node.TTL, 3, "")
default:
t.Errorf("key = %s, not matched", node.Key)
}
}
}
// Ensure that any TTL <= minExpireTime becomes Permanent
func TestMinExpireTime(t *testing.T) {
s := newStore()
fc := clockwork.NewFakeClock()
s.clock = fc
// FakeClock starts at 0, so minExpireTime should be far in the future.. but just in case
assert.True(t, minExpireTime.After(fc.Now()), "minExpireTime should be ahead of FakeClock!")
s.Create("/foo", false, "Y", false, fc.Now().Add(3*time.Second))
fc.Advance(5 * time.Second)
// Ensure it hasn't expired
s.DeleteExpiredKeys(fc.Now())
var eidx uint64 = 1
e, err := s.Get("/foo", true, false)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "get", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.Equal(t, e.Node.TTL, 0)
}
func TestSet(t *testing.T) {
s := newStore()
// Set /foo=""
var eidx uint64 = 1
e, err := s.Set("/foo", false, "", Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "set", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.False(t, e.Node.Dir, "")
assert.Equal(t, *e.Node.Value, "", "")
assert.Nil(t, e.Node.Nodes, "")
assert.Nil(t, e.Node.Expiration, "")
assert.Equal(t, e.Node.TTL, 0, "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(1), "")
// Set /foo="bar"
eidx = 2
e, err = s.Set("/foo", false, "bar", Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "set", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.False(t, e.Node.Dir, "")
assert.Equal(t, *e.Node.Value, "bar", "")
assert.Nil(t, e.Node.Nodes, "")
assert.Nil(t, e.Node.Expiration, "")
assert.Equal(t, e.Node.TTL, 0, "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(2), "")
// check prevNode
assert.NotNil(t, e.PrevNode, "")
assert.Equal(t, e.PrevNode.Key, "/foo", "")
assert.Equal(t, *e.PrevNode.Value, "", "")
assert.Equal(t, e.PrevNode.ModifiedIndex, uint64(1), "")
// Set /foo="baz" (for testing prevNode)
eidx = 3
e, err = s.Set("/foo", false, "baz", Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "set", "")
assert.Equal(t, e.Node.Key, "/foo", "")
assert.False(t, e.Node.Dir, "")
assert.Equal(t, *e.Node.Value, "baz", "")
assert.Nil(t, e.Node.Nodes, "")
assert.Nil(t, e.Node.Expiration, "")
assert.Equal(t, e.Node.TTL, 0, "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(3), "")
// check prevNode
assert.NotNil(t, e.PrevNode, "")
assert.Equal(t, e.PrevNode.Key, "/foo", "")
assert.Equal(t, *e.PrevNode.Value, "bar", "")
assert.Equal(t, e.PrevNode.ModifiedIndex, uint64(2), "")
// Set /dir as a directory
eidx = 4
e, err = s.Set("/dir", true, "", Permanent)
assert.Nil(t, err, "")
assert.Equal(t, e.EtcdIndex, eidx, "")
assert.Equal(t, e.Action, "set", "")
assert.Equal(t, e.Node.Key, "/dir", "")
assert.True(t, e.Node.Dir, "")
assert.Nil(t, e.Node.Value)
assert.Nil(t, e.Node.Nodes, "")
assert.Nil(t, e.Node.Expiration, "")
assert.Equal(t, e.Node.TTL, 0, "")
assert.Equal(t, e.Node.ModifiedIndex, uint64(4), "")
}