random utils

src/utils/mod.rs

@@ -27,3 +27,4 @@
 pub mod crypto;
 pub mod fmt;
 pub mod parser;
+pub mod random;

src/utils/random.rs

@@ -0,0 +1,52 @@
+//! ## Random
+//!
+//! `random` is the module which provides utilities for rand
+
+/*
+*
+*   Copyright (C) 2020 Christian Visintin - christian.visintin1997@gmail.com
+*
+* 	This file is part of "TermSCP"
+*
+*   TermSCP is free software: you can redistribute it and/or modify
+*   it under the terms of the GNU General Public License as published by
+*   the Free Software Foundation, either version 3 of the License, or
+*   (at your option) any later version.
+*
+*   TermSCP is distributed in the hope that it will be useful,
+*   but WITHOUT ANY WARRANTY; without even the implied warranty of
+*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+*   GNU General Public License for more details.
+*
+*   You should have received a copy of the GNU General Public License
+*   along with TermSCP.  If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+
+// Deps
+extern crate rand;
+// Ext
+use rand::{distributions::Alphanumeric, thread_rng, Rng};
+
+/// ## random_alphanumeric_with_len
+///
+/// Generate a random alphanumeric string with provided length
+pub fn random_alphanumeric_with_len(len: usize) -> String {
+    let mut rng = thread_rng();
+    std::iter::repeat(())
+        .map(|()| rng.sample(Alphanumeric))
+        .map(char::from)
+        .take(len)
+        .collect()
+}
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+
+    #[test]
+    fn test_utils_random_alphanumeric_with_len() {
+        assert_eq!(random_alphanumeric_with_len(256).len(), 256);
+    }
+}