implement validation macro tests

tests/Validation/ValidationMacroTest.php

@@ -0,0 +1,40 @@
+<?php
+
+namespace Illuminate\Tests\Validation;
+
+use Illuminate\Validation\Rule;
+use PHPUnit\Framework\TestCase;
+
+class ValidationMacroTest extends TestCase
+{
+    public function testMacroable()
+    {
+        // Define a phone validation macro
+        Rule::macro('phone', function () {
+            return 'regex:/^([0-9\s\-\+\(\)]*)$/';
+        });
+
+        $actualRule = Rule::phone();
+        $this->assertSame('regex:/^([0-9\s\-\+\(\)]*)$/', $actualRule);
+    }
+
+    public function testMacroArguments()
+    {
+        Rule::macro('maxLength', function (int $length) {
+            return "max:{$length}";
+        });
+
+        $actualRule = Rule::maxLength(10);
+        $this->assertSame('max:10', $actualRule);
+    }
+
+    public function testMacroDefaultArguments()
+    {
+        Rule::macro('maxLength', function ($length = 255) {
+            return "max:{$length}";
+        });
+
+        $actualRule = Rule::maxLength();  // No argument provided, should use default value
+        $this->assertSame('max:255', $actualRule);
+    }
+}