Upgrade test tooling to support newer Symfony components

Author: cyrossignol

composer.json

@@ -25,8 +25,8 @@
         "laravel/framework": "^5.4 || ^6.0 || ^7.0",
         "laravel/horizon": "^1.0 || ^2.0 || ^3.0 || ^4.0",
         "laravel/lumen-framework": "^5.4 || ^6.0 || ^7.0",
-        "mockery/mockery": "0.9.*",
-        "phpunit/phpunit": "^4.8"
+        "mockery/mockery": "^1.3",
+        "phpunit/phpunit": "^5.0"
     },
     "autoload": {
         "psr-4": {

tests/Support/ArtisanProcess.php

@@ -32,9 +32,17 @@ public function __construct(array $connectionConfig, $command)
             var_export($connectionConfig, true)
         ));
 
-        parent::__construct(
-            (new PhpExecutableFinder())->find() . ' artisan ' . $command,
-            ApplicationFactory::APP_PATH
-        );
+        $command = [ (new PhpExecutableFinder())->find(), 'artisan', $command ];
+        $laravelVersion = ApplicationFactory::getApplicationVersion();
+
+        // Symfony removed support for string commands in newer versions. When
+        // running Laravel >= 7, pass the command as an array. Otherwise, send
+        // it as a string:
+        //
+        if (version_compare($laravelVersion, '7.0', 'lt')) {
+            $command = implode(' ', $command);
+        }
+
+        parent::__construct($command, ApplicationFactory::APP_PATH);
     }
 }