test(test_by_yulang):add test

pkg/lru/lrutest/lrutest_test.go

@@ -0,0 +1,14 @@
+package lrutest
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestTest(t *testing.T)  {
+	ts , err := Test(2)
+	require.NoError(t, err)
+	require.Regexp(t, '\d', ts)
+
+
+}