[#239] Update test for check goroutines leak

Signed-off-by: Denis Kirillov <d.kirillov@yadro.com>

api/layer/object_test.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"crypto/rand"
 	"crypto/sha256"
+	"errors"
 	"io"
 	"testing"
 
@@ -27,3 +28,25 @@ func TestWrapReader(t *testing.T) {
 	require.Equal(t, src, dst)
 	require.Equal(t, h[:], streamHash.Sum(nil))
 }
+
+func TestGoroutinesDontLeakInPutAndHash(t *testing.T) {
+	tc := prepareContext(t)
+	l, ok := tc.layer.(*layer)
+	require.True(t, ok)
+
+	content := make([]byte, 128*1024)
+	_, err := rand.Read(content)
+	require.NoError(t, err)
+	payload := bytes.NewReader(content)
+
+	prm := PrmObjectCreate{
+		Filepath: tc.obj,
+		Payload:  payload,
+	}
+
+	expErr := errors.New("some error")
+	tc.testFrostFS.SetObjectPutError(tc.obj, expErr)
+	_, _, _, _, err = l.objectPutAndHash(tc.ctx, prm, tc.bktInfo)
+	require.ErrorIs(t, err, expErr)
+	require.Empty(t, payload.Len(), "body must be read out otherwise goroutines can leak in wrapReader")
+}