[#666] cmd/neofs-adm: Initial app structure with config init command

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

cmd/neofs-adm/internal/modules/config/config_test.go

@@ -0,0 +1,40 @@
+package config
+
+import (
+	"bytes"
+	"path"
+	"testing"
+
+	"github.com/nspcc-dev/neofs-node/pkg/innerring"
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGenerateConfigExample(t *testing.T) {
+	const (
+		n      = 10
+		appDir = "/home/example/.neofs"
+	)
+
+	configText, err := generateConfigExample(appDir, n)
+	require.NoError(t, err)
+
+	v := viper.New()
+	v.SetConfigType("yml")
+
+	require.NoError(t, v.ReadConfig(bytes.NewBufferString(configText)))
+
+	require.Equal(t, "https://neo.rpc.node:30333", v.GetString("rpc-endpoint"))
+	require.Equal(t, path.Join(appDir, "alphabet-wallets"), v.GetString("alphabet-wallets"))
+	require.Equal(t, 67108864, v.GetInt("network.max_object_size"))
+	require.Equal(t, 240, v.GetInt("network.epoch_duration"))
+
+	var i innerring.GlagoliticLetter
+	for i = 0; i < innerring.GlagoliticLetter(n); i++ {
+		key := "credentials." + i.String()
+		require.Equal(t, "password", v.GetString(key))
+	}
+
+	key := "credentials." + i.String()
+	require.Equal(t, "", v.GetString(key))
+}