Check that class exists

src/Composer/Repository/PlatformRepository.php

@@ -154,9 +154,11 @@ class PlatformRepository extends ArrayRepository
                     break;
 
                 case 'intl':
-                    # Add a seperate version for the CLDR library version
+                    if (class_exists('ResourceBundle', false)) {
-                    $cldrVersion = \ResourceBundle::create('root', 'ICUDATA-curr', false)->get('Version');
+                        # Add a seperate version for the CLDR library version
-                    $this->addLibrary('cldr', 'The unicode CLDR project', $cldrVersion);
+                        $cldrVersion = \ResourceBundle::create('root', 'ICUDATA-curr', false)->get('Version');
+                        $this->addLibrary('cldr', 'The unicode CLDR project', $cldrVersion);
+                    }
 
                     $name = 'icu';
                     $description = 'The ICU unicode and globalization support library';

tests/Composer/Test/Repository/PlatformRepositoryTest.php

@@ -69,12 +69,15 @@ class PlatformRepositoryTest extends TestCase {
         $this->assertSame('4.0.1.0-dev', $package->getVersion());
     }
 
-    public function testICULibraryVersion()
+    public function testICULibraryVersion() {
-    {
         if (!defined('INTL_ICU_VERSION')) {
             $this->markTestSkipped('Test only work with ext-intl present');
         }
 
+        if (!class_exists('ResourceBundle', false)) {
+            $this->markTestSkipped('Test only work with ResourceBundle class present');
+        }
+
         $platformRepository = new PlatformRepository();
         $packages = $platformRepository->getPackages();