find key value error

tree/vbt/iterator_test.go

@@ -0,0 +1,35 @@
+package vbt
+
+import (
+	"sort"
+	"testing"
+
+	"github.com/474420502/focus/compare"
+)
+
+func TestIerator(t *testing.T) {
+	tree := New(compare.Int)
+	l := []int{5, 10, 100, 30, 40, 70, 45, 35, 23}
+	for _, v := range l {
+		tree.Put(v)
+	}
+
+	sort.Ints(l)
+
+	iter := tree.Iterator()
+	iter.ToHead()
+	for i := 0; iter.Next(); i++ {
+
+		if iter.Value() != l[i] {
+			t.Error(iter.Value(), l[i])
+		}
+	}
+	iter.ToTail()
+	iter.Prev()
+	for i := len(l) - 1; iter.Next(); i-- {
+
+		if iter.Value() != l[i] {
+			t.Error(iter.Value(), l[i])
+		}
+	}
+}