random string

update algorithm
consolidate MakeRandomString, RandomString & GenerateCrytoString into
one function

logic/util_test.go

@@ -0,0 +1,32 @@
+package logic
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRandomString(t *testing.T) {
+	for testCase := 0; testCase < 100; testCase++ {
+		for size := 2; size < 2058; size++ {
+			if length := len(RandomString(size)); length != size {
+				t.Fatalf("expected random string of size %d, got %d instead", size, length)
+			}
+		}
+	}
+}
+
+func TestMakeRandomStringValid(t *testing.T) {
+	lengthStr := RandomString(10)
+	assert.Equal(t, len(lengthStr), 10)
+	validMqID := RandomString(23)
+	assert.False(t, strings.Contains(validMqID, "#"))
+	assert.False(t, strings.Contains(validMqID, "!"))
+	assert.False(t, strings.Contains(validMqID, "\""))
+	assert.False(t, strings.Contains(validMqID, "\\"))
+	assert.False(t, strings.Contains(validMqID, "+"))
+	assert.False(t, strings.Contains(validMqID, "-"))
+	assert.False(t, strings.Contains(validMqID, "{"))
+	assert.False(t, strings.Contains(validMqID, "}"))
+}