pkg: added random string, peer

pkg/random/string_test.go

@@ -0,0 +1,30 @@
+// Copyright 2016 The Chihaya Authors. All rights reserved.
+// Use of this source code is governed by the BSD 2-Clause license,
+// which can be found in the LICENSE file.
+
+package random
+
+import (
+	"math/rand"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAlphaNumericString(t *testing.T) {
+	r := rand.NewSource(0)
+
+	s := AlphaNumericString(r, 0)
+	assert.Equal(t, 0, len(s))
+
+	s = AlphaNumericString(r, 10)
+	assert.Equal(t, 10, len(s))
+
+	for i := 0; i < 100; i++ {
+		s := AlphaNumericString(r, 10)
+		for _, c := range s {
+			assert.True(t, strings.Contains(AlphaNumeric, string(c)))
+		}
+	}
+}