Test: ttl cache multi-threading (#235)

cmd/api/cache/ttl_test.go

@@ -4,7 +4,9 @@
 package cache
 
 import (
+	"crypto/rand"
 	"fmt"
+	"math/big"
 	"sync"
 	"testing"
 	"time"
@@ -118,6 +120,43 @@ func TestTTLCache_SetGet(t *testing.T) {
 		require.Len(t, c.queue, 4)
 		require.Len(t, c.m, 3)
 	})
+
+	t.Run("multithread", func(t *testing.T) {
+		c := NewTTLCache(Config{MaxEntitiesCount: 10}, time.Millisecond)
+
+		var wg sync.WaitGroup
+		set := func(wg *sync.WaitGroup) {
+			wg.Done()
+
+			for i := 0; i < 100; i++ {
+				val, err := rand.Int(rand.Reader, big.NewInt(255))
+				require.NoError(t, err)
+				c.Set(val.String(), []byte{byte(i)})
+			}
+		}
+		get := func(wg *sync.WaitGroup) {
+			wg.Done()
+
+			for i := 0; i < 100; i++ {
+				c.Get(fmt.Sprintf("%d", i))
+			}
+		}
+
+		for i := 0; i < 100; i++ {
+			wg.Add(2)
+			set(&wg)
+			get(&wg)
+		}
+
+		wg.Wait()
+
+		require.Len(t, c.queue, 10)
+		require.Len(t, c.m, 10)
+
+		for key := range c.m {
+			require.Contains(t, c.queue, key)
+		}
+	})
 }
 
 func TestTTLCache_Clear(t *testing.T) {