test(wpmc S4): Router root URL index_town_alt fallback + no-data behaviors

tests/RouterTest.php

@@ -120,4 +120,50 @@ final class RouterTest extends TestCase
         self::assertTrue($GLOBALS['wp_query']->is_front_page);
         self::assertTrue($GLOBALS['wp_query']->is_page);
     }
+
+    public function test_route_falls_back_to_index_town_alt_option(): void
+    {
+        \Brain\Monkey\Functions\when('is_admin')->justReturn(false);
+        $_SERVER['REQUEST_URI'] = '/tyumen/';
+        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => 'tyumen']);
+
+        $term = new \WP_Term();
+        $term->term_id = 11;
+        \Brain\Monkey\Functions\when('get_term_by')->justReturn($term);
+
+        \Brain\Monkey\Functions\when('get_field')->alias(function ($name, $where = null) {
+            if ($name === 'main_town_slug') return 'spb';
+            if ($name === 'page_no_rep') return false;
+            if ($name === 'main_page_alt') return 0;
+            if ($name === 'index_town_alt') return 777;
+            return false;
+        });
+        \Brain\Monkey\Functions\when('get_post')->justReturn((object) ['ID' => 777]);
+        \Brain\Monkey\Functions\when('status_header')->justReturn(null);
+
+        Router::route();
+
+        self::assertSame(777, $GLOBALS['wp_query']->constructor_args['page_id']);
+    }
+
+    public function test_route_does_not_install_query_when_neither_main_nor_fallback_set(): void
+    {
+        \Brain\Monkey\Functions\expect('get_post')->never();
+        \Brain\Monkey\Functions\when('is_admin')->justReturn(false);
+        $_SERVER['REQUEST_URI'] = '/tyumen/';
+        \Brain\Monkey\Functions\when('get_terms')->justReturn([11 => 'tyumen']);
+
+        $term = new \WP_Term();
+        $term->term_id = 11;
+        \Brain\Monkey\Functions\when('get_term_by')->justReturn($term);
+
+        \Brain\Monkey\Functions\when('get_field')->alias(function ($name) {
+            if ($name === 'main_town_slug') return 'spb';
+            return false;
+        });
+
+        Router::route();
+
+        self::assertArrayNotHasKey('wp_query', $GLOBALS);
+    }
 }