test fix

composer.json

@@ -26,7 +26,6 @@
         "symfony/config": "^3.4 || ^4.0 || ^5.0",
         "symfony/dependency-injection": "^3.4 || ^4.0 || ^5.0",
         "symfony/http-kernel": "^3.4 || ^4.0 || ^5.0",
-        "symfony/polyfill-php80": "^1.15",
         "symfony/service-contracts": "^1.0 || ^2.0"
     },
     "require-dev": {

src/Asset/BuildFileLocator.php

@@ -28,7 +28,7 @@ public function findFile(string $path, string $buildName = '_default'): string
         }
 
         // sanity / security check
-        if (!str_ends_with($path, '.css') && !str_ends_with($path, '.js')) {
+        if (!$this->strEndsWith($path, '.css') && !$this->strEndsWith($path, '.js')) {
             throw new \InvalidArgumentException('Can only read files ending in .css and .js');
         }
 
@@ -81,6 +81,11 @@ private function combinePaths(string $buildPath, string $path): string
         return $buildPathInfo->getPathname().'/'.implode('/', $pathParts);
     }
 
+    private function strEndsWith(string $haystack, string $needle): bool
+    {
+        return '' === $needle || $needle === \substr($haystack, -\strlen($needle));
+    }
+
     /**
      * @internal
      */

tests/Asset/EntrypointLookupTest.php

@@ -96,7 +96,7 @@ public function testGetJavaScriptFilesWithFileTrackingDisabled()
         $this->assertEquals(
             ['file1.js', 'file3.js'],
             $this->entrypointLookup->getJavaScriptFiles('other_entry'),
-            'file1.js is returned even though it was also returned above',
+            'file1.js is returned even though it was also returned above'
         );
 
         $this->assertEquals(