1 files changed, 38 insertions, 0 deletions
diff --git a/tests/MiddlewarePipelineTest.php b/tests/MiddlewarePipelineTest.php
new file mode 100644
index 0000000..107dce3
--- /dev/null
+++ b/tests/MiddlewarePipelineTest.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace BrettParson\MiniRoute\Tests;
+
+use ArrayObject;
+use BrettParson\MiniRoute\Http\RequestInterface;
+use BrettParson\MiniRoute\Http\ResponseInterface;
+use BrettParson\MiniRoute\Middleware\MiddlewarePipeline;
+use BrettParson\MiniRoute\Tests\Fixtures\FakeMiddleware;
+use BrettParson\MiniRoute\Tests\Fixtures\TestRequest;
+use BrettParson\MiniRoute\Tests\Fixtures\TestResponse;
+use PHPUnit\Framework\TestCase;
+
+final class MiddlewarePipelineTest extends TestCase
+{
+    public function testMiddlewareRunsOutermostFirstAndCoreLast(): void
+    {
+        $log = new ArrayObject();
+
+        $outer = new FakeMiddleware('outer', $log);
+        $inner = new FakeMiddleware('inner', $log);
+
+        $core = static function (RequestInterface $request) use ($log): ResponseInterface {
+            $log->append('core');
+
+            return new TestResponse(200, 'ok');
+        };
+
+        $pipeline = MiddlewarePipeline::compose([$outer, $inner], $core);
+
+        $response = $pipeline(new TestRequest('GET', '/'));
+
+        $this->assertSame(['outer', 'inner', 'core'], $log->getArrayCopy());
+        $this->assertSame(200, $response->status());
+    }
+}