From 3c91bf4ad2b692d6f3a9bf79bd91e779f5f59fde Mon Sep 17 00:00:00 2001
From: nuno maduro <enunomaduro@gmail.com>
Date: Thu, 30 Apr 2026 20:51:57 +0100
Subject: [PATCH] wip

---
 src/Exceptions/NoAffectedTestsFound.php | 38 +++++++++++++++++++++++++
 src/Plugins/Tia.php                     |  6 ++++
 2 files changed, 44 insertions(+)
 create mode 100644 src/Exceptions/NoAffectedTestsFound.php

diff --git a/src/Exceptions/NoAffectedTestsFound.php b/src/Exceptions/NoAffectedTestsFound.php
new file mode 100644
index 00000000..29b144bd
--- /dev/null
+++ b/src/Exceptions/NoAffectedTestsFound.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Exceptions;
+
+use InvalidArgumentException;
+use NunoMaduro\Collision\Contracts\RenderlessEditor;
+use NunoMaduro\Collision\Contracts\RenderlessTrace;
+use Pest\Contracts\Panicable;
+use Symfony\Component\Console\Exception\ExceptionInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * @internal
+ */
+final class NoAffectedTestsFound extends InvalidArgumentException implements ExceptionInterface, Panicable, RenderlessEditor, RenderlessTrace
+{
+    /**
+     * Renders the panic on the given output.
+     */
+    public function render(OutputInterface $output): void
+    {
+        $output->writeln([
+            '',
+            '  <fg=white;options=bold;bg=blue> INFO </> No affected tests found.',
+            '',
+        ]);
+    }
+
+    /**
+     * The exit code to be used.
+     */
+    public function exitCode(): int
+    {
+        return 0;
+    }
+}
diff --git a/src/Plugins/Tia.php b/src/Plugins/Tia.php
index ce1619f6..161b68ec 100644
--- a/src/Plugins/Tia.php
+++ b/src/Plugins/Tia.php
@@ -19,6 +19,8 @@ use Pest\Plugins\Tia\Recorder;
 use Pest\Plugins\Tia\ResultCollector;
 use Pest\Plugins\Tia\TableExtractor;
 use Pest\Plugins\Tia\WatchPatterns;
+use Pest\Exceptions\NoAffectedTestsFound;
+use Pest\Panic;
 use Pest\Support\Container;
 use Pest\TestCaseFilters\TiaTestCaseFilter;
 use Pest\TestSuite;
@@ -705,6 +707,10 @@ final class Tia implements AddsOutput, HandlesArguments, Terminable
         $this->registerRecap();
 
         if ($this->filteredMode) {
+            if ($affected === []) {
+                Panic::with(new NoAffectedTestsFound);
+            }
+
             TestSuite::getInstance()->tests->addTestCaseFilter(
                 new TiaTestCaseFilter($projectRoot, $graph, $affectedSet),
             );