// genTree generate radix.Tree which has specified length
func genTree(length, keyLen, valueLen int) *radix.Tree {
g := dummy.NewGenerator()
t := radix.New()
for i := 0; i < length; i++ {
t.Insert(g.String(keyLen), g.String(valueLen))
}
return t
}
// genTreeTSV generate tsv for building tree.
func genTreeTSV(length, keyLen, valueLen int) io.Reader {
g := dummy.NewGenerator()
var buf bytes.Buffer
for i := 0; i < length; i++ {
buf.WriteString(g.String(keyLen))
buf.WriteString("\t")
buf.WriteString(g.String(valueLen))
buf.WriteString("\n")
}
return &buf
}