Added a test edit page; fixed some styles

src/Controllers/TestController.php

@@ -64,4 +64,49 @@ class TestController extends Controller {
       ->withStatus(302);
   }
 
+  public function getEdit(Request $request, Response $response, array $args): Response {
+    $test = Test::where('id', $args['test_id'])->first();
+    $benchmarks = Benchmark::all();
+    $components = Component::all();
+
+    $view = Twig::fromRequest($request);
+    return $view->render($response, 'test/edit.twig', [
+      'test'       => $test,
+      'benchmarks' => $benchmarks,
+      'components' => $components,
+    ]);
+  }
+
+  public function postEdit(Request $request, Response $response, array $args): Response {
+    $params = (array)$request->getParsedBody();
+
+    $test = Test::where('id', $args['test_id'])->first();
+    $test->title = $params['test_title'];
+    $test->description = $params['test_description'];
+    $test->component_id = $params['test_component'];
+
+    $test->save();
+
+    // attach benchmarks to test that aren't already attached
+    foreach ($params['test_benchmarks'] as $b) {
+      if (!$test->isBenchmarkSelected($b)) {
+        $test->benchmarks()->attach($b);
+      }
+    }
+
+    // remove benchmarks are not in the list
+    foreach ($test->benchmarks as $b) {
+      if (!in_array($b->id, $params['test_benchmarks'])) {
+        $test->benchmarks()->detach($b);
+      }
+    }
+
+    // redirect the user back to the home page
+    $routeContext = RouteContext::fromRequest($request);
+    $routeParser = $routeContext->getRouteParser();
+    return $response
+      ->withHeader('Location', $routeParser->urlFor('test.view', [ 'test_id' => $test->id ]))
+      ->withStatus(302);
+  }
+
 }