[12.x] Fix passing countable to Number::format() (laravel#57434)

* Fix passing countable to Number::format() * Add test assertions * Fix typo

Author: riesjart

src/Illuminate/Support/Str.php

@@ -996,6 +996,10 @@ public static function parseCallback($callback, $default = null)
  */
  public static function plural($value, $count = 2, $prependCount = false)
  {
+ if (is_countable($count)) {
+ $count = count($count);
+ }
+
  return ($prependCount ? Number::format($count).' ' : '').Pluralizer::plural($value, $count);
  }
 

tests/Support/SupportStrTest.php

@@ -1870,8 +1870,16 @@ public function testReplaceMatches()
  public function testPlural(): void
  {
  $this->assertSame('Laracon', Str::plural('Laracon', 1));
+ $this->assertSame('Laracon', Str::plural('Laracon', [2025]));
+
  $this->assertSame('Laracons', Str::plural('Laracon', 3));
+ $this->assertSame('Laracons', Str::plural('Laracon', [2024, 2025]));
+
+ $this->assertSame('1 Laracon', Str::plural('Laracon', 1, prependCount: true));
+ $this->assertSame('1 Laracon', Str::plural('Laracon', [2025], prependCount: true));
+
  $this->assertSame('1,000 Laracons', Str::plural('Laracon', 1000, prependCount: true));
+ $this->assertSame('2 Laracons', Str::plural('Laracon', [2024, 2025], prependCount: true));
  }
 
  public function testPluralPascal(): void