added APSE to VALID_REGIONS (#717)

* added APSE to VALID_REGIONS

* added unit test for valid regions

* adjusted test to assert region and mapping separately, removed client in terminal endpoint from client.php and region.php mapping

Author: DjoykeAbyah

src/Adyen/Region.php

@@ -4,18 +4,47 @@
 
 class Region
 {
+    /**
+     * European Union region
+    */
     const EU = "eu";
+    
+    /**
+     * United States region
+     */
     const US = "us";
+
+    /**
+     * Australia region
+     */
     const AU = "au";
+    
+    /**
+     * India region
+     */
     const IN = "in";
 
+    /**
+     * Asia-Pacific, South East region
+     */
+    const APSE = "apse";
+
+   /**
+     * List of all valid regions
+     * @var array<int,string>
+     */
     const VALID_REGIONS = [
         self::EU,
         self::US,
         self::AU,
-        self::IN
+        self::IN,
+        self::APSE
     ];
 
+    /**
+     * Maps regions to their respective Terminal API endpoints.
+     * @var array<string, string>
+     */
     const TERMINAL_API_ENDPOINTS_MAPPING = [
         self::EU => Client::ENDPOINT_TERMINAL_CLOUD_LIVE,
         self::US => Client::ENDPOINT_TERMINAL_CLOUD_US_LIVE,

tests/Unit/RegionTest.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Adyen\Tests\Unit;
+
+use PHPUnit\Framework\TestCase;
+use Adyen\Region;
+
+class RegionTest extends TestCase
+{
+    public function testValidRegions()
+    {
+        $expected = [
+            "eu",
+            "us",
+            "au",
+            "in",
+            "apse",
+        ];
+
+        $this->assertEquals(
+            $expected,
+            Region::VALID_REGIONS,
+            "VALID_REGIONS should match the expected regions."
+        );
+    }
+
+    public function testTerminalApiEndpointsMapping()
+    {
+        $expected = [
+            "eu" => "https://terminal-api-live.adyen.com",
+            "us" => "https://terminal-api-live-us.adyen.com",
+            "au" => "https://terminal-api-live-au.adyen.com",
+            "apse" => "https://terminal-api-live-apse.adyen.com",
+        ];
+
+        $this->assertEquals(
+            $expected,
+            Region::TERMINAL_API_ENDPOINTS_MAPPING,
+            "TERMINAL_API_ENDPOINTS_MAPPING should match the expected mappings."
+        );
+    }
+}