From dd688c2d6864130e5c0018bb1563ee83410d64e2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mariusz=20Roli=C5=84ski?= <mariusz@mondoreale.pl>
Date: Fri, 23 Jan 2026 12:59:56 +0100
Subject: [PATCH] refactor: Make `browser-test-runner` support `karma-setup.js`
 or `karma-setup.ts`

Sometimes it's typescript that u want.
---
 .../browser-test-runner/src/createKarmaConfig.ts    | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/packages/browser-test-runner/src/createKarmaConfig.ts b/packages/browser-test-runner/src/createKarmaConfig.ts
index 38d09d8285..8cb5f0884c 100644
--- a/packages/browser-test-runner/src/createKarmaConfig.ts
+++ b/packages/browser-test-runner/src/createKarmaConfig.ts
@@ -9,9 +9,16 @@ export const createKarmaConfig = (
     const setupFiles = [__dirname + '/karma-setup.js']
 
     if (localDirectory !== undefined) {
-        const localSetupFile = localDirectory + '/karma-setup.js'
-        if (fs.existsSync(localSetupFile)) {
-            setupFiles.push(localSetupFile)
+        const karmaSetupCandidates = [
+            `${localDirectory}/karma-setup.js`,
+            `${localDirectory}/karma-setup.ts`
+        ]
+
+        for (const candidate of karmaSetupCandidates) {
+            if (fs.existsSync(candidate)) {
+                setupFiles.push(candidate)
+                break
+            }
         }
     }