feat: check to prevent minor length great or equal then zero

strand.go

@@ -8,6 +8,10 @@ import (
 
 // RandomBytes generates secure random bytes
 func RandomBytes(len int) ([]byte, error) {
+	if len <= 0 {
+		return []byte(nil), nil
+	}
+
 	size := math.Ceil(float64(len) / 2.0)
 	byts := make([]byte, int(size))
 
@@ -22,6 +26,10 @@ func RandomBytes(len int) ([]byte, error) {
 
 // RandomString generates a secure random string
 func RandomString(len int) (str string, err error) {
+	if len <= 0 {
+		return "", nil
+	}
+
 	byts, err := RandomBytes(len)
 
 	if err != nil {

strand_test.go

@@ -23,6 +23,13 @@ func TestRandomBytess(t *testing.T) {
 			},
 			want: 16,
 		},
+		{
+			name: "Verify RandomBytes with <= 0 length",
+			args: args{
+				len: 0,
+			},
+			want: 0,
+		},
 	}
 
 	for _, tt := range tests {
@@ -60,6 +67,13 @@ func TestRandomString(t *testing.T) {
 			},
 			want: 32,
 		},
+		{
+			name: "Verify RandomString with <= 0 length",
+			args: args{
+				len: 0,
+			},
+			want: 0,
+		},
 	}
 
 	for _, tt := range tests {