chore: add more tests (#2797)

* chore: add more tests

* chore: add more tests

* chore: add more tests

core/stores/cache/cachestat_test.go

@@ -0,0 +1,28 @@
+package cache
+
+import (
+	"testing"
+
+	"github.com/zeromicro/go-zero/core/timex"
+)
+
+func TestCacheStat_statLoop(t *testing.T) {
+	t.Run("stat loop total 0", func(t *testing.T) {
+		var stat Stat
+		ticker := timex.NewFakeTicker()
+		go stat.statLoop(ticker)
+		ticker.Tick()
+		ticker.Tick()
+		ticker.Stop()
+	})
+
+	t.Run("stat loop total not 0", func(t *testing.T) {
+		var stat Stat
+		stat.IncrementTotal()
+		ticker := timex.NewFakeTicker()
+		go stat.statLoop(ticker)
+		ticker.Tick()
+		ticker.Tick()
+		ticker.Stop()
+	})
+}