Adds uppercase validation rule (#44918)

Author: michaelnabil230

src/Illuminate/Validation/Concerns/ValidatesAttributes.php

@@ -1171,6 +1171,19 @@ public function validateLowercase($attribute, $value, $parameters)
         return Str::lower($value) === $value;
     }
 
+    /**
+     * Validate that an attribute is uppercase.
+     *
+     * @param  string  $attribute
+     * @param  mixed  $value
+     * @param  array<int, int|string>  $parameters
+     * @return bool
+     */
+    public function validateUppercase($attribute, $value, $parameters)
+    {
+        return Str::upper($value) === $value;
+    }
+
     /**
      * Validate the MIME type of a file is an image MIME type.
      *

tests/Validation/ValidationValidatorTest.php

@@ -1830,6 +1830,33 @@ public function testLowercase()
         ], $v->messages()->keys());
     }
 
+    public function testUppercase()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $v = new Validator($trans, [
+            'lower' => 'lowercase',
+            'mixed' => 'MixedCase',
+            'upper' => 'UPPERCASE',
+            'lower_multibyte' => 'carácter multibyte',
+            'mixed_multibyte' => 'carÁcter multibyte',
+            'upper_multibyte' => 'CARÁCTER MULTIBYTE',
+        ], [
+            'lower' => 'uppercase',
+            'mixed' => 'uppercase',
+            'upper' => 'uppercase',
+            'lower_multibyte' => 'uppercase',
+            'mixed_multibyte' => 'uppercase',
+            'upper_multibyte' => 'uppercase',
+        ]);
+
+        $this->assertSame([
+            'lower',
+            'mixed',
+            'lower_multibyte',
+            'mixed_multibyte',
+        ], $v->messages()->keys());
+    }
+
     public function testLessThan()
     {
         $trans = $this->getIlluminateArrayTranslator();