add test

Signed-off-by: disksing <i@disksing.com>

server/statistics/store_test.go

@@ -0,0 +1,48 @@
+// Copyright 2021 TiKV Project Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package statistics
+
+import (
+	"time"
+
+	. "github.com/pingcap/check"
+	"github.com/pingcap/kvproto/pkg/metapb"
+	"github.com/pingcap/kvproto/pkg/pdpb"
+	"github.com/tikv/pd/server/core"
+)
+
+var _ = Suite(&testStoreSuite{})
+
+type testStoreSuite struct{}
+
+func (s *testStoreSuite) TestFilterUnhealtyStore(c *C) {
+	stats := NewStoresStats()
+	cluster := core.NewBasicCluster()
+	for i := uint64(1); i <= 5; i++ {
+		cluster.PutStore(core.NewStoreInfo(&metapb.Store{Id: i}, core.SetLastHeartbeatTS(time.Now())))
+		stats.Observe(i, &pdpb.StoreStats{})
+	}
+	c.Assert(stats.GetStoresLoads(), HasLen, 5)
+
+	cluster.PutStore(cluster.GetStore(1).Clone(core.SetLastHeartbeatTS(time.Now().Add(-24 * time.Hour))))
+	cluster.PutStore(cluster.GetStore(2).Clone(core.TombstoneStore()))
+	cluster.DeleteStore(cluster.GetStore(3))
+
+	stats.FilterUnhealthyStore(cluster)
+	loads := stats.GetStoresLoads()
+	c.Assert(loads, HasLen, 2)
+	c.Assert(loads[4], NotNil)
+	c.Assert(loads[5], NotNil)
+}