Timezone fixes for php 8.1 (#490)

* Added simple test for TimeZoneHelper #461
* TimeZone offset: don't use float values for columns that could be array keys #461

tests/unit/TimeZoneTest.php

@@ -0,0 +1,26 @@
+<?php
+
+use Da\User\Helper\TimezoneHelper;
+use Da\User\Validator\TimeZoneValidator;
+use yii\helpers\ArrayHelper;
+
+/**
+ * Testing the Timezone generator functions
+ */
+class TimeZoneTest extends \Codeception\Test\Unit
+{
+    // Basic test to check the function works
+    public function testTimezoneHelper()
+    {
+        $alltz = (new TimezoneHelper)->getAll();
+        $this->assertTrue(in_array("Europe/Rome", ArrayHelper::getColumn($alltz, "timezone")));
+        $this->assertTrue(in_array("0100", ArrayHelper::getColumn($alltz, "offset")));
+    }
+
+    // Test with minPasswordRequirements equal to an empty array (= password without requirements)
+    public function testTimeZoneValidator()
+    {
+        $v = Yii::createObject(TimeZoneValidator::class, ["Europe/Rome"]);
+        $this->assertTrue($v->validate());
+    }
+}