Merge pull request #206 from cakebaker/bump_rand

Bump `rand` & adapt tests to its API changes

tests/common/random.rs

@@ -1,10 +1,10 @@
-// This file is part of the uutils coreutils package.
+// This file is part of the uutils util-linux package.
 //
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-use rand::distributions::{Distribution, Uniform};
-use rand::{thread_rng, Rng};
+use rand::distr::{Distribution, Uniform};
+use rand::{rng, Rng};
 
 /// Samples alphanumeric characters `[A-Za-z0-9]` including newline `\n`
 ///
@@ -38,7 +38,7 @@ impl AlphanumericNewline {
     where
         R: Rng + ?Sized,
     {
-        let idx = rng.gen_range(0..Self::CHARSET.len());
+        let idx = rng.random_range(0..Self::CHARSET.len());
         Self::CHARSET[idx]
     }
 }
@@ -80,7 +80,7 @@ impl RandomString {
     where
         D: Distribution<u8>,
     {
-        thread_rng()
+        rng()
             .sample_iter(dist)
             .take(length)
             .map(|b| b as char)
@@ -132,15 +132,15 @@ impl RandomString {
             return if num_delimiter > 0 {
                 String::from(delimiter as char)
             } else {
-                String::from(thread_rng().sample(&dist) as char)
+                String::from(rng().sample(&dist) as char)
             };
         }
 
         let samples = length - 1;
-        let mut result: Vec<u8> = thread_rng().sample_iter(&dist).take(samples).collect();
+        let mut result: Vec<u8> = rng().sample_iter(&dist).take(samples).collect();
 
         if num_delimiter == 0 {
-            result.push(thread_rng().sample(&dist));
+            result.push(rng().sample(&dist));
             return String::from_utf8(result).unwrap();
         }
 
@@ -150,9 +150,10 @@ impl RandomString {
             num_delimiter
         };
 
-        let between = Uniform::new(0, samples);
+        // safe to unwrap because samples is at least 1, thus high > low
+        let between = Uniform::new(0, samples).unwrap();
         for _ in 0..num_delimiter {
-            let mut pos = between.sample(&mut thread_rng());
+            let mut pos = between.sample(&mut rng());
             let turn = pos;
             while result[pos] == delimiter {
                 pos += 1;
@@ -169,7 +170,7 @@ impl RandomString {
         if end_with_delimiter {
             result.push(delimiter);
         } else {
-            result.push(thread_rng().sample(&dist));
+            result.push(rng().sample(&dist));
         }
 
         String::from_utf8(result).unwrap()
@@ -179,7 +180,7 @@ impl RandomString {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use rand::distributions::Alphanumeric;
+    use rand::distr::Alphanumeric;
 
     #[test]
     fn test_random_string_generate() {