From e4444ca48c0aa8415aeb29b27a23fb4d7cd211ec Mon Sep 17 00:00:00 2001
From: codwu <wuhan9087@163.com>
Date: Fri, 6 Jul 2018 20:30:27 +0800
Subject: [PATCH] update `addInterval` function and test.

Signed-off-by: codwu <wuhan9087@163.com>
---
 querier_test.go | 6 +++++-
 tombstones.go   | 3 +--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/querier_test.go b/querier_test.go
index 51b01de1c..d3ddec407 100644
--- a/querier_test.go
+++ b/querier_test.go
@@ -557,7 +557,11 @@ func TestBlockQuerierDelete(t *testing.T) {
 				},
 			},
 		},
-		tombstones: NewMemTombstones().addInterval(1, Interval{1, 3}).addInterval(2, Interval{1, 3}, Interval{6, 10}).addInterval(3, Interval{6, 10}),
+		tombstones: &memTombstones{mts: map[uint64]Intervals{
+			1: Intervals{{1, 3}},
+			2: Intervals{{1, 3}, {6, 10}},
+			3: Intervals{{6, 10}},
+		}},
 		queries: []query{
 			{
 				mint: 2,
diff --git a/tombstones.go b/tombstones.go
index 733a81afb..03389de72 100644
--- a/tombstones.go
+++ b/tombstones.go
@@ -183,13 +183,12 @@ func (t *memTombstones) Iter(f func(uint64, Intervals) error) error {
 }
 
 // addInterval to an existing memTombstones
-func (t *memTombstones) addInterval(ref uint64, itvs ...Interval) *memTombstones {
+func (t *memTombstones) addInterval(ref uint64, itvs ...Interval) {
 	t.mtx.Lock()
 	defer t.mtx.Unlock()
 	for _, itv := range itvs {
 		t.mts[ref] = t.mts[ref].add(itv)
 	}
-	return t
 }
 
 func (memTombstones) Close() error {