From 5ee0eb70c79e363b73902a91035ce6d8477bf3c0 Mon Sep 17 00:00:00 2001
From: davidholyko <david.holy.ko@gmail.com>
Date: Wed, 5 Mar 2025 15:30:34 -0500
Subject: [PATCH] fix: conditionally inject NWTL and simmer.js

---
 src/index.js | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/src/index.js b/src/index.js
index e9437b7..f384daf 100644
--- a/src/index.js
+++ b/src/index.js
@@ -15,9 +15,20 @@ const SIMMERJS = fs.readFileSync(require.resolve('simmerjs/dist/simmer.js')).toS
 let _config = null;
 
 function injectNWTL(browser) {
-    browser.execute(DOM_TESTING_LIBRARY_UMD);
+    const shouldInject = browser.execute(function () {
+      return {
+        domTestingLibrary: !window.TestingLibraryDom,
+        simmer: !window.Simmer,
+      }
+    });
+
+    if (shouldInject.domTestingLibrary) {
+      browser.execute(DOM_TESTING_LIBRARY_UMD);
+    }
 
-    browser.execute(SIMMERJS);
+    if (shouldInject.simmer) {
+      browser.execute(SIMMERJS);
+    }
 
     if (_config) {
         // eslint-disable-next-line no-shadow