test: add tests for fallback to default controller

Author: kenjis

tests/system/Router/AutoRouterImprovedTest.php

@@ -213,6 +213,45 @@ public function testAutoRouteFallbackToDefaultMethod()
         $this->assertSame(['15'], $params);
     }
 
+    public function testAutoRouteFallbackToDefaultControllerOneParam()
+    {
+        $router = $this->createNewAutoRouter();
+
+        [$directory, $controller, $method, $params]
+            = $router->getRoute('subfolder/15');
+
+        $this->assertSame('Subfolder/', $directory);
+        $this->assertSame('\CodeIgniter\Router\Controllers\Subfolder\Home', $controller);
+        $this->assertSame('getIndex', $method);
+        $this->assertSame(['15'], $params);
+    }
+
+    public function testAutoRouteFallbackToDefaultControllerTwoParams()
+    {
+        $router = $this->createNewAutoRouter();
+
+        [$directory, $controller, $method, $params]
+            = $router->getRoute('subfolder/15/20');
+
+        $this->assertSame('Subfolder/', $directory);
+        $this->assertSame('\CodeIgniter\Router\Controllers\Subfolder\Home', $controller);
+        $this->assertSame('getIndex', $method);
+        $this->assertSame(['15', '20'], $params);
+    }
+
+    public function testAutoRouteFallbackToDefaultControllerNoParams()
+    {
+        $router = $this->createNewAutoRouter();
+
+        [$directory, $controller, $method, $params]
+            = $router->getRoute('subfolder');
+
+        $this->assertSame('Subfolder/', $directory);
+        $this->assertSame('\CodeIgniter\Router\Controllers\Subfolder\Home', $controller);
+        $this->assertSame('getIndex', $method);
+        $this->assertSame([], $params);
+    }
+
     public function testAutoRouteRejectsSingleDot()
     {
         $this->expectException(PageNotFoundException::class);

tests/system/Router/Controllers/Subfolder/Home.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <[email protected]>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+namespace CodeIgniter\Router\Controllers\Subfolder;
+
+use CodeIgniter\Controller;
+
+class Home extends Controller
+{
+    public function getIndex($p1 = null, $p2 = null)
+    {
+    }
+}