Add test for implicit binding (#35346)

tests/Routing/ImplicitRouteBindingTest.php

@@ -0,0 +1,35 @@
+<?php
+
+namespace Illuminate\Tests\Routing;
+
+use Illuminate\Container\Container;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Routing\ImplicitRouteBinding;
+use Illuminate\Routing\Route;
+use PHPUnit\Framework\TestCase;
+
+class ImplicitRouteBindingTest extends TestCase
+{
+    public function test_it_can_resolve_the_implicit_route_bindings_for_the_given_route()
+    {
+        $action = ['uses' => function (ImplicitRouteBindingUser $user) {
+            return $user;
+        }];
+
+        $route = new Route('GET', '/test', $action);
+        $route->parameters = ['user' => new ImplicitRouteBindingUser];
+
+        $route->prepareForSerialization();
+
+        $container = Container::getInstance();
+
+        ImplicitRouteBinding::resolveForRoute($container, $route);
+
+        $this->assertTrue(true);
+    }
+}
+
+class ImplicitRouteBindingUser extends Model
+{
+    //
+}