major update

tests/Service/Audit/SystemAuditRedactionServiceTest.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace MintyPHP\Tests\Service\Audit;
+
+use MintyPHP\Service\Audit\SystemAuditRedactionService;
+use PHPUnit\Framework\TestCase;
+
+class SystemAuditRedactionServiceTest extends TestCase
+{
+    public function testSensitiveKeysAreRedacted(): void
+    {
+        $service = new SystemAuditRedactionService();
+
+        $redacted = $service->redactMetadata([
+            'email' => 'john@example.com',
+            'token' => 'abc',
+            'active' => 1,
+            'nested' => ['password' => 'secret'],
+        ]);
+
+        $this->assertSame('[REDACTED]', $redacted['email']);
+        $this->assertSame('[REDACTED]', $redacted['token']);
+        $this->assertSame(1, $redacted['active']);
+        $this->assertSame('[REDACTED]', $redacted['nested']['password']);
+    }
+
+    public function testBuildChangeSetUsesAllowlistAndRedactsOtherValues(): void
+    {
+        $service = new SystemAuditRedactionService();
+
+        $changeSet = $service->buildChangeSet(
+            ['active' => 0, 'description' => 'old'],
+            ['active' => 1, 'description' => 'new']
+        );
+
+        $this->assertSame(['active', 'description'], $changeSet['changed_fields']);
+        $this->assertSame(0, $changeSet['changes']['active']['before']);
+        $this->assertSame(1, $changeSet['changes']['active']['after']);
+        $this->assertSame('[REDACTED]', $changeSet['changes']['description']['before']);
+        $this->assertSame('[REDACTED]', $changeSet['changes']['description']['after']);
+    }
+}