fix: make router cache attributes time independent

Author: michalsn

system/Router/Attributes/Cache.php

@@ -16,6 +16,7 @@
 use Attribute;
 use CodeIgniter\HTTP\RequestInterface;
 use CodeIgniter\HTTP\ResponseInterface;
+use CodeIgniter\I18n\Time;
 
 /**
  * Cache Attribute
@@ -74,7 +75,8 @@ public function before(RequestInterface $request): RequestInterface|ResponseInte
             foreach ($cached['headers'] as $name => $value) {
                 $response->setHeader($name, $value);
             }
-            $response->setHeader('Age', (string) (time() - ($cached['timestamp'] ?? time())));
+            $time = Time::now()->getTimestamp();
+            $response->setHeader('Age', (string) ($time - ($cached['timestamp'] ?? $time)));
 
             return $response;
         }
@@ -122,7 +124,7 @@ public function after(RequestInterface $request, ResponseInterface $response): ?
             'body'      => $response->getBody(),
             'headers'   => $headers,
             'status'    => $response->getStatusCode(),
-            'timestamp' => time(),
+            'timestamp' => Time::now()->getTimestamp(),
         ];
 
         cache()->save($cacheKey, $data, $this->for);

tests/system/Router/Attributes/CacheTest.php

@@ -17,6 +17,7 @@
 use CodeIgniter\HTTP\ResponseInterface;
 use CodeIgniter\HTTP\SiteURI;
 use CodeIgniter\HTTP\UserAgent;
+use CodeIgniter\I18n\Time;
 use CodeIgniter\Test\CIUnitTestCase;
 use CodeIgniter\Test\Mock\MockAppConfig;
 use Config\Services;
@@ -34,6 +35,8 @@ protected function setUp(): void
 
         // Clear cache before each test
         cache()->clean();
+
+        Time::setTestNow('2026-01-10 12:00:00');
     }
 
     public function testConstructorDefaults(): void
@@ -73,7 +76,7 @@ public function testBeforeReturnsCachedResponseWhenFound(): void
             'body'      => 'Cached content',
             'status'    => 200,
             'headers'   => ['Content-Type' => 'text/html'],
-            'timestamp' => time() - 10,
+            'timestamp' => Time::now()->getTimestamp() - 10,
         ];
         cache()->save($cacheKey, $cachedData, 3600);
 
@@ -124,7 +127,7 @@ public function testBeforeUsesCustomCacheKey(): void
             'body'      => 'Custom cached content',
             'status'    => 200,
             'headers'   => [],
-            'timestamp' => time(),
+            'timestamp' => Time::now()->getTimestamp(),
         ];
         cache()->save('my_custom_key', $cachedData, 3600);