test: 🚨 add test for area checker

tests/AreaCheckerTest.php

@@ -0,0 +1,41 @@
+<?php
+
+use PHPUnit\Framework\TestCase;
+
+require __DIR__ . '/../src/php/AreaChecker.php';
+
+class AreaCheckerTest extends TestCase
+{
+
+    public static function providerForAreaCheck()
+    {
+        return [
+            // Points in the top-right quadrant (triangle check)
+            'TopRight Inside Triangle Top' => [0.5, 1, 2, true],
+            'TopRight Inside Triangle Right' => [1, 1, 4, true],
+            'TopRight Outside Triangle Right' => [2, 1, 2, false],
+            'TopRight Outside Triangle Top' => [0.6, 1, 2, false],
+
+            // Points in the top-left quadrant (rectangle check)
+            'TopLeft Inside Rect Top' => [-0.5, 0.5, 2, true],
+            'TopLeft Inside Rect Left' => [-1, 1, 2, true],
+            'TopLeft Outside Rect Left' => [-1.1, 1, 2, false],
+            'TopLeft Outside Rect Top' => [-1, 2.1, 2, false],
+
+            // Points in the bottom-right quadrant (circle check)
+            'BottomRight Inside Circle' => [1, -1, 2, true],
+            'BottomRight Outside Circle' => [2, -2, 2, false],
+
+            // Points in the bottom-left quadrant (always outside)
+            'BottomLeft Always Outside' => [-0.5, -0.5, 2, false]
+        ];
+    }
+
+    /**
+     * @dataProvider providerForAreaCheck
+     */
+    public function testIsInArea($x, $y, $r, $expected)
+    {
+        $this->assertSame($expected, AreaChecker::isInArea($x, $y, $r));
+    }
+}