From e03d906cb73df5c65f3bc105191ff796c5d1264e Mon Sep 17 00:00:00 2001
From: Alex Vanin <alexey@nspcc.ru>
Date: Wed, 20 Jan 2021 21:13:18 +0300
Subject: [PATCH] [#334] engine: Make tests more predictable

There is a codecov issue because objects are not placed
in the engine the same way every unit test. Therefore
sometimes there are more coverage, sometimes there are
less. Seeded RNG should solve this issue for engine tests.

Signed-off-by: Alex Vanin <alexey@nspcc.ru>
---
 pkg/local_object_storage/blobovnicza/blobovnicza_test.go | 4 +++-
 pkg/local_object_storage/blobstor/blobovnicza_test.go    | 4 +++-
 pkg/local_object_storage/metabase/db_test.go             | 2 +-
 pkg/local_object_storage/shard/shard_test.go             | 2 +-
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/pkg/local_object_storage/blobovnicza/blobovnicza_test.go b/pkg/local_object_storage/blobovnicza/blobovnicza_test.go
index c603479c..923933d5 100644
--- a/pkg/local_object_storage/blobovnicza/blobovnicza_test.go
+++ b/pkg/local_object_storage/blobovnicza/blobovnicza_test.go
@@ -1,8 +1,8 @@
 package blobovnicza
 
 import (
-	"crypto/rand"
 	"crypto/sha256"
+	"math/rand"
 	"os"
 	"testing"
 
@@ -70,6 +70,8 @@ func testGet(t *testing.T, blz *Blobovnicza, addr *objectSDK.Address, expObj []b
 }
 
 func TestBlobovnicza(t *testing.T) {
+	rand.Seed(1024)
+
 	p := "./test_blz"
 
 	sizeLim := uint64(256 * 1 << 10) // 256KB
diff --git a/pkg/local_object_storage/blobstor/blobovnicza_test.go b/pkg/local_object_storage/blobstor/blobovnicza_test.go
index d1cf3aaa..833d7242 100644
--- a/pkg/local_object_storage/blobstor/blobovnicza_test.go
+++ b/pkg/local_object_storage/blobstor/blobovnicza_test.go
@@ -1,9 +1,9 @@
 package blobstor
 
 import (
-	"crypto/rand"
 	"crypto/sha256"
 	"errors"
+	"math/rand"
 	"os"
 	"testing"
 
@@ -55,6 +55,8 @@ func testObject(sz uint64) *object.Object {
 }
 
 func TestBlobovniczas(t *testing.T) {
+	rand.Seed(1024)
+
 	l := test.NewLogger(false)
 	p := "./test_blz"
 
diff --git a/pkg/local_object_storage/metabase/db_test.go b/pkg/local_object_storage/metabase/db_test.go
index 6a2f3a63..d996cbab 100644
--- a/pkg/local_object_storage/metabase/db_test.go
+++ b/pkg/local_object_storage/metabase/db_test.go
@@ -1,8 +1,8 @@
 package meta_test
 
 import (
-	"crypto/rand"
 	"crypto/sha256"
+	"math/rand"
 	"os"
 	"testing"
 
diff --git a/pkg/local_object_storage/shard/shard_test.go b/pkg/local_object_storage/shard/shard_test.go
index 0d243bc3..5e2465f8 100644
--- a/pkg/local_object_storage/shard/shard_test.go
+++ b/pkg/local_object_storage/shard/shard_test.go
@@ -1,8 +1,8 @@
 package shard_test
 
 import (
-	"crypto/rand"
 	"crypto/sha256"
+	"math/rand"
 	"os"
 	"path"
 	"testing"