start covers attribute implementation

src/Factories/Attributes/Covers.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Factories\Attributes;
+
+use Pest\Factories\TestCaseMethodFactory;
+
+/**
+ * @internal
+ */
+final class Covers
+{
+    /**
+     * Adds attributes regarding the "covers" feature.
+     *
+     * @param \Pest\Factories\TestCaseMethodFactory $method
+     * @param array<int, string> $attributes
+     *
+     * @return array<int, string>
+     */
+    public function __invoke(TestCaseMethodFactory $method, array $attributes): array
+    {
+        foreach ($method->covers as $covering) {
+            if (is_array($covering)) {
+                $attributes[] = "#[\PHPUnit\Framework\Attributes\CoversClass({$covering[0]}]";
+                $attributes[] = "#[\PHPUnit\Framework\Attributes\CoversFunction({$covering[1]}]";
+            } else {
+                $attributes[] = "#[\PHPUnit\Framework\Attributes\CoversClass($covering)]";
+            }
+        }
+
+        return $attributes;
+    }
+}