chore: implement php test suites

Signed-off-by: Sebastian Krupinski <krupinski01@gmail.com>

tests/php/Integration/BaseTest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace KTXT\MailManager\Tests\Integration;
+
+use PHPUnit\Framework\TestCase;
+
+class BaseTest extends TestCase
+{
+    public function testBasicAssertion(): void
+    {
+        $this->assertTrue(true);
+    }
+
+    public function testArrayOperations(): void
+    {
+        $array = ['foo' => 'bar'];
+
+        $this->assertArrayHasKey('foo', $array);
+        $this->assertEquals('bar', $array['foo']);
+    }
+
+    public function testStringOperations(): void
+    {
+        $string = 'Hello, World!';
+
+        $this->assertStringContainsString('World', $string);
+        $this->assertEquals(13, strlen($string));
+    }
+}

tests/php/bootstrap.php

@@ -2,6 +2,16 @@
 
 require dirname(__DIR__, 2).'/lib/vendor/autoload.php';
 
+// When this module is checked out inside a full server (server/modules/<handle>,
+// as it is in CI and in this monorepo checkout), also load the server's own
+// core/shared autoloader so tests can reference framework (KTXC/KTXF) types.
+// Standalone module checkouts without a server alongside them skip this.
+define('SERVER_ROOT', dirname(__DIR__, 4));
+$serverAutoload = SERVER_ROOT . '/vendor/autoload.php';
+if (is_file($serverAutoload)) {
+    require $serverAutoload;
+}
+
 if (isset($_SERVER['APP_DEBUG']) && $_SERVER['APP_DEBUG']) {
     umask(0000);
 }

tests/php/phpunit.xml

@@ -21,6 +21,9 @@
         <testsuite name="Unit Tests">
             <directory>unit</directory>
         </testsuite>
+        <testsuite name="Integration Tests">
+            <directory>Integration</directory>
+        </testsuite>
     </testsuites>
 
     <source ignoreSuppressionOfDeprecations="true"
@@ -29,8 +32,7 @@
             restrictWarnings="true"
     >
         <include>
-            <directory>../../core/lib</directory>
-            <directory>../../shared/lib</directory>
+            <directory>../../lib</directory>
         </include>
     </source>