v3.0.0 (#18)

internal/pkg/rand/doc.go

@@ -0,0 +1,7 @@
+/*
+Package rand helps generating a random string.
+
+It should be used for creating directory and
+file names in order to avoid collision.
+*/
+package rand

internal/pkg/rand/rand.go

@@ -0,0 +1,17 @@
+package rand
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+)
+
+// Get returns a random string.
+func Get() (string, error) {
+	randBytes := make([]byte, 16)
+	_, err := rand.Read(randBytes)
+	if err != nil {
+		return "", fmt.Errorf("creating random string: %v", err)
+	}
+	return hex.EncodeToString(randBytes), nil
+}

internal/pkg/rand/rand_test.go

@@ -0,0 +1,16 @@
+package rand
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGet(t *testing.T) {
+	rand1, err := Get()
+	require.Nil(t, err)
+	rand2, err := Get()
+	require.Nil(t, err)
+	assert.NotEqual(t, rand1, rand2)
+}