now it will sort recursively, and the sorting test case is better....

file_system/event.go

@@ -36,17 +36,17 @@ type KeyValuePair struct {
 	KVPairs []KeyValuePair `json:"kvs,omitempty"`
 }
 
-// interfaces for sort
-func (e Event) Len() int {
-	return len(e.KVPairs)
+// interfaces for sorting
+func (k KeyValuePair) Len() int {
+	return len(k.KVPairs)
 }
 
-func (e Event) Less(i, j int) bool {
-	return e.KVPairs[i].Key < e.KVPairs[j].Key
+func (k KeyValuePair) Less(i, j int) bool {
+	return k.KVPairs[i].Key < k.KVPairs[j].Key
 }
 
-func (e Event) Swap(i, j int) {
-	e.KVPairs[i], e.KVPairs[j] = e.KVPairs[j], e.KVPairs[i]
+func (k KeyValuePair) Swap(i, j int) {
+	k.KVPairs[i], k.KVPairs[j] = k.KVPairs[j], k.KVPairs[i]
 }
 
 func newEvent(action string, key string, index uint64, term uint64) *Event {

file_system/file_system.go

@@ -26,7 +26,7 @@ func New() *FileSystem {
 
 }
 
-func (fs *FileSystem) Get(nodePath string, recusive, sorted bool, index uint64, term uint64) (*Event, error) {
+func (fs *FileSystem) Get(nodePath string, recursive, sorted bool, index uint64, term uint64) (*Event, error) {
 	n, err := fs.InternalGet(nodePath, index, term)
 
 	if err != nil {
@@ -51,16 +51,22 @@ func (fs *FileSystem) Get(nodePath string, recusive, sorted bool, index uint64,
 				continue
 			}
 
-			e.KVPairs[i] = child.Pair(recusive)
+			e.KVPairs[i] = child.Pair(recursive, sorted)
 
 			i++
 		}
 
 		// eliminate hidden nodes
 		e.KVPairs = e.KVPairs[:i]
-		if sorted {
-			sort.Sort(e)
+
+		rootPairs := KeyValuePair{
+			KVPairs: e.KVPairs,
 		}
+
+		if sorted {
+			sort.Sort(rootPairs)
+		}
+
 	} else { // node is file
 		e.Value = n.Value
 	}

file_system/file_system_test.go

@@ -1,7 +1,8 @@
 package fileSystem
 
 import (
-	"store"
+	"math/rand"
+	"strconv"
 	"testing"
 	"time"
 )
@@ -408,16 +409,17 @@ func TestSort(t *testing.T) {
 	fs := New()
 
 	// simulating random creation
-	keys := store.GenKeys(100, 5)
+	keys := GenKeys(80, 4)
 
 	//t.Log(keys)
 	i := uint64(1)
 	for _, k := range keys {
 		_, err := fs.Create(k, "bar", Permanent, i, 1)
 		if err != nil {
-			t.Fatalf("create node[%s] failed", k, err.Error())
+			//t.Logf("create node[%s] failed %s", k, err.Error())
+		} else {
+			i++
 		}
-		i++
 	}
 
 	e, err := fs.Get("/foo", true, true, i, 1)
@@ -426,9 +428,53 @@ func TestSort(t *testing.T) {
 	}
 
 	for i, k := range e.KVPairs[:len(e.KVPairs)-1] {
+		//t.Log("root:")
 		//t.Log(k)
 		if k.Key >= e.KVPairs[i+1].Key {
 			t.Fatalf("sort failed, [%s] should be placed after [%s]", k.Key, e.KVPairs[i+1].Key)
 		}
+
+		if k.Dir {
+			recursiveTestSort(k, t)
+		}
+
+	}
+
+	if k := e.KVPairs[len(e.KVPairs)-1]; k.Dir {
+		recursiveTestSort(k, t)
 	}
 }
+
+func recursiveTestSort(k KeyValuePair, t *testing.T) {
+	//t.Log("recursive in")
+	//t.Log(k)
+	for i, v := range k.KVPairs[:len(k.KVPairs)-1] {
+		if v.Key >= k.KVPairs[i+1].Key {
+			t.Fatalf("sort failed, [%s] should be placed after [%s]", v.Key, k.KVPairs[i+1].Key)
+		}
+
+		if v.Dir {
+			recursiveTestSort(v, t)
+		}
+
+	}
+
+	if v := k.KVPairs[len(k.KVPairs)-1]; v.Dir {
+		recursiveTestSort(v, t)
+	}
+}
+
+// GenKeys randomly generate num of keys with max depth
+func GenKeys(num int, depth int) []string {
+	keys := make([]string, num)
+	for i := 0; i < num; i++ {
+
+		keys[i] = "/foo"
+		depth := rand.Intn(depth) + 1
+
+		for j := 0; j < depth; j++ {
+			keys[i] += "/" + strconv.Itoa(rand.Int()%20)
+		}
+	}
+	return keys
+}

file_system/node.go

@@ -3,6 +3,7 @@ package fileSystem
 import (
 	"fmt"
 	"path"
+	"sort"
 	"sync"
 	"time"
 
@@ -279,7 +280,7 @@ func (n *Node) IsHidden() bool {
 	return false
 }
 
-func (n *Node) Pair(recurisive bool) KeyValuePair {
+func (n *Node) Pair(recurisive, sorted bool) KeyValuePair {
 
 	if n.IsDir() {
 		pair := KeyValuePair{
@@ -303,14 +304,16 @@ func (n *Node) Pair(recurisive bool) KeyValuePair {
 				continue
 			}
 
-			pair.KVPairs[i] = child.Pair(recurisive)
+			pair.KVPairs[i] = child.Pair(recurisive, sorted)
 
 			i++
 		}
 
 		// eliminate hidden nodes
 		pair.KVPairs = pair.KVPairs[:i]
-
+		if sorted {
+			sort.Sort(pair)
+		}
 		return pair
 	}
 

store/test.go

@@ -14,7 +14,7 @@ func GenKeys(num int, depth int) []string {
 		depth := rand.Intn(depth) + 1
 
 		for j := 0; j < depth; j++ {
-			keys[i] += "/" + strconv.Itoa(rand.Int())
+			keys[i] += "/" + strconv.Itoa(rand.Int()%20)
 		}
 	}
 	return keys