add name list

weed/util/skiplist/name_list_test.go

@@ -0,0 +1,73 @@
+package skiplist
+
+import (
+	"math/rand"
+	"strconv"
+	"testing"
+)
+
+const (
+	maxNameCount = 100
+)
+
+func String(x int) string {
+	return strconv.Itoa(x)
+}
+
+func TestNameList(t *testing.T) {
+	list := NewNameList(memStore, 7)
+
+	for i := 0; i < maxNameCount; i++ {
+		list.WriteName(String(i))
+	}
+
+	counter := 0
+	list.ListNames("", func(name string) bool {
+		counter++
+		print(name, " ")
+		return true
+	})
+	if counter != maxNameCount {
+		t.Fail()
+	}
+
+	// list.skipList.println()
+
+	deleteBase := 5
+	deleteCount := maxNameCount - 3 * deleteBase
+
+	for i := deleteBase; i < deleteBase+deleteCount; i++ {
+		list.DeleteName(String(i))
+	}
+
+	counter = 0
+	list.ListNames("", func(name string) bool {
+		counter++
+		return true
+	})
+	// list.skipList.println()
+	if counter != maxNameCount-deleteCount {
+		t.Fail()
+	}
+
+	// randomized deletion
+	list = NewNameList(memStore, 7)
+	// Delete elements at random positions in the list.
+	rList := rand.Perm(maxN)
+	for _, i := range rList {
+		list.WriteName(String(i))
+	}
+	for _, i := range rList {
+		list.DeleteName(String(i))
+	}
+	counter = 0
+	list.ListNames("", func(name string) bool {
+		counter++
+		print(name, " ")
+		return true
+	})
+	if counter != 0 {
+		t.Fail()
+	}
+
+}