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\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/phpunit.xml

@@ -19,7 +19,10 @@
 
     <testsuites>
         <testsuite name="Unit Tests">
-            <directory>unit</directory>
+            <directory>Unit</directory>
+        </testsuite>
+        <testsuite name="Integration Tests">
+            <directory>Integration</directory>
         </testsuite>
     </testsuites>