Merge pull request #1 from usabilla/feature/frozen-clock-setter

Make FrozenClock mutable through setter

src/FrozenClock.php

@@ -18,6 +18,11 @@ public function __construct(DateTimeImmutable $now)
         $this->now = $now;
     }
 
+    public function setTo(DateTimeImmutable $now): void
+    {
+        $this->now = $now;
+    }
+
     public function now(): DateTimeImmutable
     {
         return $this->now;

test/FrozenClockTest.php

@@ -23,4 +23,23 @@ public function nowShouldReturnAlwaysTheSameObject()
         self::assertSame($now, $clock->now());
         self::assertSame($now, $clock->now());
     }
+
+    /**
+     * @test
+     *
+     * @covers \Lcobucci\Clock\FrozenClock::setTo
+     * @uses   \Lcobucci\Clock\FrozenClock::__construct()
+     * @uses   \Lcobucci\Clock\FrozenClock::now
+     */
+    public function nowSetChangesTheObject()
+    {
+        $oldNow = new DateTimeImmutable();
+        $clock  = new FrozenClock($oldNow);
+
+        $newNow = new DateTimeImmutable();
+        $clock->setTo($newNow);
+
+        self::assertNotSame($oldNow, $clock->now());
+        self::assertSame($newNow, $clock->now());
+    }
 }