From 58ac0d6996aaba402c7339803000280e4fd7c14f Mon Sep 17 00:00:00 2001
From: antonkomarev <ell@cybercog.su>
Date: Sun, 23 Feb 2020 09:18:59 +0300
Subject: [PATCH] Add DateTimeImmutable tests

---
 src/RocketChatAttachment.php       |  5 ++++-
 tests/RocketChatAttachmentTest.php | 14 +++++++++++++-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/RocketChatAttachment.php b/src/RocketChatAttachment.php
index 75db712..91f354f 100644
--- a/src/RocketChatAttachment.php
+++ b/src/RocketChatAttachment.php
@@ -109,7 +109,10 @@ public function text(string $text): self
     public function timestamp($timestamp): self
     {
         if (! ($timestamp instanceof DateTime) && ! is_string($timestamp)) {
-            throw new InvalidArgumentException('Timestamp must be string or DateTime, '.gettype($timestamp).' given.');
+            throw new InvalidArgumentException(sprintf(
+                'Timestamp must be string or DateTime, %s given.',
+                get_class($timestamp)
+            ));
         }
 
         if ($timestamp instanceof DateTime) {
diff --git a/tests/RocketChatAttachmentTest.php b/tests/RocketChatAttachmentTest.php
index 4dc9b9b..16d14ab 100644
--- a/tests/RocketChatAttachmentTest.php
+++ b/tests/RocketChatAttachmentTest.php
@@ -4,6 +4,8 @@
 
 namespace NotificationChannels\RocketChat\Test;
 
+use DateTime;
+use DateTimeImmutable;
 use NotificationChannels\RocketChat\RocketChatAttachment;
 use PHPUnit\Framework\TestCase;
 
@@ -63,13 +65,23 @@ public function it_can_set_the_timestamp(): void
     /** @test */
     public function it_can_set_the_timestamp_as_datetime(): void
     {
-        $date = \DateTime::createFromFormat('Y-m-d H:i:s.u', '2020-02-19 19:00:00.000');
+        $date = DateTime::createFromFormat('Y-m-d H:i:s.u', '2020-02-19 19:00:00.000');
         $attachment = new RocketChatAttachment();
         $attachment->timestamp($date);
 
         $this->assertEquals(['ts' => '2020-02-19T19:00:00.000Z'], $attachment->toArray());
     }
 
+    /** @test */
+    public function it_can_set_the_timestamp_as_immutable_datetime(): void
+    {
+        $date = DateTimeImmutable::createFromFormat('Y-m-d H:i:s.u', '2020-02-19 19:00:00.000');
+        $attachment = new RocketChatAttachment();
+        $attachment->timestamp($date);
+
+        $this->assertSame(['ts' => '2020-02-19T19:00:00.000Z'], $attachment->toArray());
+    }
+
     /** @test */
     public function it_can_set_the_thumb_url(): void
     {