[Clock] Align MockClock::sleep() behavior with NativeClock for negative values

yoeunes · yoeunes · commit b5e75005f58f · 2025-11-08T17:52:52.000+01:00
diff --git a/src/Symfony/Component/Clock/MockClock.php b/src/Symfony/Component/Clock/MockClock.php
@@ -54,6 +54,10 @@ public function now(): DatePoint
 
     public function sleep(float|int $seconds): void
     {
+        if (0 >= $seconds) {
+            return;
+        }
+
         $now = (float) $this->now->format('Uu') + $seconds * 1e6;
         $now = substr_replace(\sprintf('@%07.0F', $now), '.', -6, 0);
         $timezone = $this->now->getTimezone();
diff --git a/src/Symfony/Component/Clock/Tests/MockClockTest.php b/src/Symfony/Component/Clock/Tests/MockClockTest.php
@@ -117,4 +117,16 @@ public function testWithTimeZone()
         $this->assertNotSame($clock, $utcClock);
         $this->assertSame('UTC', $utcClock->now()->getTimezone()->getName());
     }
+
+    public function testSleepWithNegativeValueDoesNothing()
+    {
+        $initialTime = new \DateTimeImmutable('2000-01-01 12:00:00 UTC');
+        $clock = new MockClock($initialTime);
+
+        // Attempt to sleep for a negative duration
+        $clock->sleep(-10.5);
+
+        // Assert that the time has NOT changed, matching NativeClock behavior
+        $this->assertEquals($initialTime, $clock->now());
+    }
 }
