vbt 代码覆盖率75%+ 修改IndexRange的bug

priority_queue/vbt.go

@@ -1,8 +1,9 @@
 package pqueue
 
 import (
-	"github.com/474420502/focus/compare"
 	"github.com/davecgh/go-spew/spew"
+
+	"github.com/474420502/focus/compare"
 )
 
 type Node struct {
@@ -100,9 +101,9 @@ func (tree *vbTree) IndexRange(idx1, idx2 int) (result []interface{}, ok bool) {
 
 	if idx1^idx2 < 0 {
 		if idx1 < 0 {
-			idx1 = tree.root.size + idx1 - 1
+			idx1 = tree.root.size + idx1
 		} else {
-			idx2 = tree.root.size + idx2 - 1
+			idx2 = tree.root.size + idx2
 		}
 	}