test: add clock tests

Author: wazabii8

tests/unitary-dto-clock-iso.php

@@ -0,0 +1,35 @@
+<?php
+use MaplePHP\DTO\Format\Clock;
+use MaplePHP\DTO\Traverse;
+use MaplePHP\Unitary\{Config\TestConfig, Expect, TestCase};
+
+$config = TestConfig::make("Testing clock iso")->withName("clock-iso");
+
+group($config, function(TestCase $case) {
+
+    Clock::setDefaultTimezone('Europe/Stockholm');
+
+    $clockObj = Traverse::value([
+        "summer" => "2025-06-03T12:30:00Z",
+        "winter" => "2025-01-03T12:30:00Z",
+        "localA" => "2025-06-03T12:30:00",
+        "localB" => "2025-06-03T12:30:00+02:00",
+    ]);
+
+    $case->expect($clockObj->summer->clock()->format('y/m/d \k\l. H:i:s'))
+        ->isEqualTo("25/06/03 kl. 14:30:00")
+        ->assert("Z-timestamp should be parsed as UTC and converted to Europe/Stockholm (summer time).");
+
+    $case->expect($clockObj->winter->clock()->format('y/m/d \k\l. H:i:s'))
+        ->isEqualTo("25/01/03 kl. 13:30:00")
+        ->assert("Z-timestamp should be parsed as UTC and converted to Europe/Stockholm (winter time).");
+
+    $case->expect($clockObj->localA->clock()->format('y/m/d \k\l. H:i:s'))
+        ->isEqualTo("25/06/03 kl. 12:30:00")
+        ->assert("Offset-less ISO 8601 datetime should be treated as local time in Europe/Stockholm.");
+
+    $case->expect($clockObj->localB->clock()->format('y/m/d \k\l. H:i:s'))
+        ->isEqualTo("25/06/03 kl. 12:30:00")
+        ->assert("Datetime with +02:00 offset should align with local Europe/Stockholm time without shifting wall time.");
+
+});