Apply fallback to composer default download method

Author: asgrim

src/DependencyResolver/Package.php

@@ -94,11 +94,11 @@ public static function fromComposerCompletePackage(CompletePackageInterface $com
             /** @var string|list<string> $method */
             $method = $phpExtOptions['download-url-method'];
             if (is_array($method)) {
-                if (count($method) !== 1) {
-                    throw new InvalidArgumentException('This extension requires a newer version of PIE. Multiple download-url-methods are not supported until PIE 1.4.0.');
+                if (count($method) === 1) {
+                    $method = $method[0];
+                } else {
+                    $method = DownloadUrlMethod::ComposerDefaultDownload->value;
                 }
-
-                $method = $method[0];
             }
 
             $package->downloadUrlMethod = DownloadUrlMethod::tryFrom($method);

test/unit/DependencyResolver/PackageTest.php

@@ -173,8 +173,8 @@ public function testDownloadUrlMethodWithMultiItemListIsNotYetSupported(): void
         $composerCompletePackage = new CompletePackage('vendor/foo', '1.2.3.0', '1.2.3');
         $composerCompletePackage->setPhpExt(['download-url-method' => ['pre-packaged-source', 'composer-default']]);
 
-        $this->expectException(InvalidArgumentException::class);
-        $this->expectExceptionMessage('This extension requires a newer version of PIE. Multiple download-url-methods are not supported until PIE 1.4.0.');
-        Package::fromComposerCompletePackage($composerCompletePackage);
+        $package = Package::fromComposerCompletePackage($composerCompletePackage);
+
+        self::assertSame(DownloadUrlMethod::ComposerDefaultDownload, $package->downloadUrlMethod());
     }
 }