Small minor details for local dev (#125)

CONTRIBUTING.md

@@ -2,7 +2,8 @@
 
 ## MySQL
 
-To execute the test suite, you need running a MySQL server.
+To execute the test suite, you need a running MySQL server.
+
 The easiest way to get them up and running is using Docker:
 
     docker run --rm --platform=linux/amd64 -e MYSQL_ROOT_PASSWORD=root -e MYSQL_DATABASE=odm -p 3306:3306 -d mysql
@@ -13,7 +14,8 @@ Then run the test suite:
 
 ## Postgres
 
-To execute the test suite, you need running a PostgreSQL server.
+To execute the test suite, you need a running PostgreSQL server.
+
 The easiest way to get them up and running is using Docker:
 
     docker run --rm -e POSTGRES_PASSWORD=postgres -p 5432:5432 -d postgres

tests/bootstrap.php

@@ -7,9 +7,19 @@
  * with this source code in the file LICENSE.
  */
 
+use Symfony\Component\Console\Input\ArrayInput;
+use Symfony\Component\Console\Output\ConsoleOutput;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
 date_default_timezone_set('UTC');
 
 $loader = require __DIR__.'/../vendor/autoload.php';
 require __DIR__.'/Fixtures/AppKernel.php';
 
+if (!isset($_SERVER['DATABASE_URL'])) {
+    (new SymfonyStyle(new ArrayInput([]), new ConsoleOutput()))->error("DATABASE_URL environment var is not set.\nCheck the CONTRIBUTING.md file for more details about how to test this project.");
+
+    exit(1);
+}
+
 return $loader;