* initial version

test/AppTest/Handler/HomePageHandlerTest.php

@@ -0,0 +1,70 @@
+<?php
+
+declare(strict_types=1);
+
+namespace AppTest\Handler;
+
+use App\Handler\HomePageHandler;
+use Laminas\Diactoros\Response\HtmlResponse;
+use Laminas\Diactoros\Response\JsonResponse;
+use Mezzio\Router\RouterInterface;
+use Mezzio\Template\TemplateRendererInterface;
+use PHPUnit\Framework\TestCase;
+use Prophecy\Argument;
+use Prophecy\PhpUnit\ProphecyTrait;
+use Prophecy\Prophecy\ObjectProphecy;
+use Psr\Container\ContainerInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+use function get_class;
+
+class HomePageHandlerTest extends TestCase
+{
+    use ProphecyTrait;
+
+    /** @var ContainerInterface|ObjectProphecy */
+    protected $container;
+
+    /** @var RouterInterface|ObjectProphecy */
+    protected $router;
+
+    protected function setUp(): void
+    {
+        $this->container = $this->prophesize(ContainerInterface::class);
+        $this->router    = $this->prophesize(RouterInterface::class);
+    }
+
+    public function testReturnsJsonResponseWhenNoTemplateRendererProvided()
+    {
+        $homePage = new HomePageHandler(
+            get_class($this->container->reveal()),
+            $this->router->reveal(),
+            null
+        );
+        $response = $homePage->handle(
+            $this->prophesize(ServerRequestInterface::class)->reveal()
+        );
+
+        $this->assertInstanceOf(JsonResponse::class, $response);
+    }
+
+    public function testReturnsHtmlResponseWhenTemplateRendererProvided()
+    {
+        $renderer = $this->prophesize(TemplateRendererInterface::class);
+        $renderer
+            ->render('app::home-page', Argument::type('array'))
+            ->willReturn('');
+
+        $homePage = new HomePageHandler(
+            get_class($this->container->reveal()),
+            $this->router->reveal(),
+            $renderer->reveal()
+        );
+
+        $response = $homePage->handle(
+            $this->prophesize(ServerRequestInterface::class)->reveal()
+        );
+
+        $this->assertInstanceOf(HtmlResponse::class, $response);
+    }
+}