Make SettableClock support both int and interval

Author: dbellettini

src/Clock/SettableClock.php

@@ -15,9 +15,13 @@ public function __construct(\DateTimeInterface $now)
         $this->wrapped = new MockClock(\DateTimeImmutable::createFromInterface($now));
     }
 
-    public function advance(int $seconds): void
+    public function advance(int|\DateInterval $secondsOrInterval): void
     {
-        $now = $this->now()->add(new \DateInterval("PT{$seconds}S"));
+        if (!$secondsOrInterval instanceof \DateInterval) {
+            $secondsOrInterval = new \DateInterval("PT{$secondsOrInterval}S");
+        }
+
+        $now = $this->now()->add($secondsOrInterval);
         $this->wrapped = new MockClock($now);
     }
 

tests/Clock/SettableClockTest.php

@@ -37,6 +37,20 @@ public function testItAdvancesTimeBySeconds(): void
         );
     }
 
+    public function testItAdvancesTimeByDateInterval(): void
+    {
+        $initialTime = new \DateTime('2023-10-01 12:00:00');
+        $clock = new SettableClock($initialTime);
+
+        $clock->advance(new \DateInterval('PT1H')); // 1 hour
+
+        $this->assertEquals(
+            new \DateTimeImmutable('2023-10-01 13:00:00'),
+            $clock->now(),
+            'Clock should advance by the specified seconds',
+        );
+    }
+
     public function testItCanAdvanceMultipleTimes(): void
     {
         $initialTime = new \DateTime('2023-10-01 12:00:00');