From 7f6238cb794b8953471ff9dc236e329c09df79e6 Mon Sep 17 00:00:00 2001
From: lgrossi <lucas.ggrossi@gmail.com>
Date: Thu, 4 Jul 2024 11:39:19 +0200
Subject: [PATCH] Add modify and default constructor to FrozenClock

---
 src/FrozenClock.php      |  7 ++++++-
 test/FrozenClockTest.php | 19 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/FrozenClock.php b/src/FrozenClock.php
index 0aad7016..aa04efa7 100644
--- a/src/FrozenClock.php
+++ b/src/FrozenClock.php
@@ -8,7 +8,7 @@
 
 final class FrozenClock implements Clock
 {
-    public function __construct(private DateTimeImmutable $now)
+    public function __construct(private DateTimeImmutable $now = new DateTimeImmutable())
     {
     }
 
@@ -22,6 +22,11 @@ public function setTo(DateTimeImmutable $now): void
         $this->now = $now;
     }
 
+    public function modify(string $modify): void
+    {
+        $this->now = $this->now->modify($modify);
+    }
+
     public function now(): DateTimeImmutable
     {
         return $this->now;
diff --git a/test/FrozenClockTest.php b/test/FrozenClockTest.php
index fc4ab7ad..cba0d4fb 100644
--- a/test/FrozenClockTest.php
+++ b/test/FrozenClockTest.php
@@ -34,6 +34,25 @@ public function nowSetChangesTheObject(): void
         self::assertSame($newNow, $clock->now());
     }
 
+    #[Test]
+    public function modifyChangesTheObject(): void
+    {
+        $oldNow = new DateTimeImmutable();
+        $newNow = $oldNow->modify('+1 day');
+
+        $clock  = new FrozenClock($oldNow);
+
+        $clock->modify('+1 day');
+
+        self::assertNotEquals($oldNow, $clock->now());
+        self::assertEquals($newNow, $clock->now());
+
+        $clock->modify('-1 day');
+
+        self::assertEquals($oldNow, $clock->now());
+        self::assertNotEquals($newNow, $clock->now());
+    }
+
     #[Test]
     public function fromUTCCreatesClockFrozenAtCurrentSystemTimeInUTC(): void
     {