[8.x] Tests for route closures (#35345)

* Test RouteAction

* Add RouteSignatureParameters test

tests/Routing/RouteActionTest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Illuminate\Tests\Routing;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Routing\RouteAction;
+use Opis\Closure\SerializableClosure;
+use PHPUnit\Framework\TestCase;
+
+class RouteActionTest extends TestCase
+{
+    public function test_it_can_detect_a_serialized_closure()
+    {
+        $action = ['uses' => serialize(new SerializableClosure(function (RouteActionUser $user) {
+            return $user;
+        }))];
+
+        $this->assertTrue(RouteAction::containsSerializedClosure($action));
+
+        $action = ['uses' => 'FooController@index'];
+
+        $this->assertFalse(RouteAction::containsSerializedClosure($action));
+    }
+}
+
+class RouteActionUser extends Model
+{
+    //
+}

tests/Routing/RouteSignatureParametersTest.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Illuminate\Tests\Routing;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Routing\RouteSignatureParameters;
+use Opis\Closure\SerializableClosure;
+use PHPUnit\Framework\TestCase;
+use ReflectionParameter;
+
+class RouteSignatureParametersTest extends TestCase
+{
+    public function test_it_can_extract_the_route_action_signature_parameters()
+    {
+        $action = ['uses' => serialize(new SerializableClosure($callable = function (SignatureParametersUser $user) {
+            return $user;
+        }))];
+
+        $parameters = RouteSignatureParameters::fromAction($action);
+
+        $this->assertContainsOnlyInstancesOf(ReflectionParameter::class, $parameters);
+        $this->assertSame('user', $parameters[0]->getName());
+    }
+}
+
+class SignatureParametersUser extends Model
+{
+    //
+}