test: add regression test for upstream codeception sprintf bug

Author: Fahl-Design

tests/Unit/ReportPrinterSprintfBugTest.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace WebProject\Codeception\Module\AiReporter\Tests\Unit;
+
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Validates that escaping a percent sign as `%%` works around the Codeception 5
+ * upstream ArgumentCountError in `Codeception\Reporter\ReportPrinter` using the
+ * `--report` cli flag.
+ */
+class ReportPrinterSprintfBugTest extends TestCase
+{
+    /**
+     * @dataProvider provideEscapedPercentInNameCases
+     */
+    public function testEscapedPercentInName(int $value): void
+    {
+        self::assertSame(1, $value);
+    }
+
+    /**
+     * @return array<string, array<int>>
+     */
+    public static function provideEscapedPercentInNameCases(): iterable
+    {
+        return [
+            // The %% is rendered as % by the Codeception ReportPrinter sprintf
+            '100%% safely escaped' => [1],
+        ];
+    }
+}