tests: independent region sync test (#1545)

* tests: independent syncer region test

Signed-off-by: nolouch <nolouch@gmail.com>

tests/server/region_syncer_test.go → tests/server/region_syncer/region_syncer_test.go

@@ -11,10 +11,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package server_test
+package syncer_test
 
 import (
 	"context"
+	"testing"
 	"time"
 
 	. "github.com/pingcap/check"
@@ -25,6 +26,18 @@ import (
 	"github.com/pingcap/pd/tests"
 )
 
+func Test(t *testing.T) {
+	TestingT(t)
+}
+
+var _ = Suite(&serverTestSuite{})
+
+type serverTestSuite struct{}
+
+func (s *serverTestSuite) SetUpSuite(c *C) {
+	server.EnableZap = true
+}
+
 type idAllocator struct {
 	id uint64
 }