Improve Str::set

src/Support/Str.php

@@ -49,22 +49,27 @@ public static function literal(array|string $string): array|string
      */
     public static function set(array|int $from, int|float|null $to = null): string
     {
+        // If $from is an array with multiple elements, return them as a comma-separated list.
         if (is_array($from) && count($from) > 1) {
             return implode(',', $from);
         }
 
+        // If $from is an array with a single element, return that element.
         if (is_array($from) && count($from) === 1) {
-            return $from[0].':'.$from[0];
+            return (string) reset($from);
         }
 
+        // At this point, $from is an integer. No upper bound provided, return $from as a string.
         if (is_null($to)) {
-            return $from;
+            return (string) $from;
         }
 
+        // If the upper bound is infinite, use the '*' notation.
         if ($to == INF) {
             return $from.':*';
         }
 
+        // Otherwise, return a typical range string.
         return $from.':'.$to;
     }
 

tests/Support/StrTest.php

@@ -6,10 +6,18 @@
     expect(Str::set(5, 10))->toBe('5:10');
     expect(Str::set(5, INF))->toBe('5:*');
     expect(Str::set([5, 10]))->toBe('5,10');
-    expect(Str::set([5]))->toBe('5:5');
+    expect(Str::set([5]))->toBe('5');
     expect(Str::set(5))->toBe('5');
 });
 
+test('set ignores $to when $from is a single-element array', function () {
+    expect(Str::set([5], 10))->toBe('5');
+});
+
+test('set ignores $to when $from is a multi-element array', function () {
+    expect(Str::set([5, 6], 10))->toBe('5,6');
+});
+
 test('escape removes newlines/control characters and escapes backslashes and double quotes', function () {
     // Newlines and control characters removed
     expect(Str::escape("Hello\nWorld"))->toBe('HelloWorld');