Change configuration to use environment variables instead of globals.

phpunit.xml

@@ -1,13 +1,13 @@
 <phpunit bootstrap="bootstrap/bootstrap.php">
     <php>
-        <var name="DB_DSN" value="sqlite::memory:" />
-        <var name="DB_USER" value="root" />
-        <var name="DB_PASSWORD" value="" />
-        <var name="DB_NAME" value="daenerys" />
+        <env name="DB_DSN" value="sqlite::memory:" />
+        <env name="DB_USER" value="root" />
+        <env name="DB_PASSWORD" value="" />
+        <env name="DB_NAME" value="daenerys" />
     </php>
     <testsuites>
         <testsuite name="All">
             <directory>tests</directory>
         </testsuite>
     </testsuites>
-</phpunit>
+</phpunit>

src/Bootstrap.php

@@ -3,6 +3,8 @@ declare(strict_types=1);
 
 namespace LotGD\Core;
 
+use LotGD\Core\Exceptions\InvalidConfigurationException;
+
 use Doctrine\ORM\EntityManager;
 use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\Mapping\AnsiQuoteStrategy;
@@ -11,9 +13,28 @@ use Doctrine\ORM\Tools\SchemaTool;
 
 class Bootstrap
 {
+    /**
+     * Create a new Game object, with all the necessary configuration.
+     * @throws InvalidConfigurationException
+     * @return Game The newly created Game object.
+     */
     public static function createGame(): Game
     {
-        $pdo = new \PDO($GLOBALS['DB_DSN'], $GLOBALS["DB_USER"], $GLOBALS["DB_PASSWORD"]);
+        $dsn = getenv('DB_DSN');
+        $user = getenv('DB_USER');
+        $passwd = getenv('DB_PASSWORD');
+
+        if ($dsn === false || strlen($dsn) == 0) {
+          throw new InvalidConfigurationException("Invalid or missing data source name: '{$dsn}'");
+        }
+        if ($user === false || strlen($user) == 0) {
+          throw new InvalidConfigurationException("Invalid or missing database user: '{$user}'");
+        }
+        if ($passwd === false) {
+          throw new InvalidConfigurationException("Invalid or missing database password: '{$passwd}'");
+        }
+
+        $pdo = new \PDO($dsn, $user, $passwd);
 
         // Read db annotations from model files
         $configuration = Setup::createAnnotationMetadataConfiguration(["src/Models"], true);

src/Exceptions/InvalidConfigurationException.php

@@ -0,0 +1,11 @@
+<?php
+declare(strict_types=1);
+
+namespace LotGD\Core\Exceptions;
+
+/**
+ * Exception if a configuration value is missing or invalid.
+ */
+class InvalidConfigurationException extends CoreException {
+
+}

tests/ModelTestCase.php

@@ -29,7 +29,7 @@ abstract class ModelTestCase extends \PHPUnit_Extensions_Database_TestCase
     {
         if ($this->connection === null) {
             if (self::$pdo === null) {
-                self::$pdo = new \PDO($GLOBALS['DB_DSN'], $GLOBALS["DB_USER"], $GLOBALS["DB_PASSWORD"]);
+                self::$pdo = new \PDO(getenv('DB_DSN'), getenv('DB_USER'), getenv('DB_PASSWORD'));
 
                 // Read db annotations from model files
                 $configuration = Setup::createAnnotationMetadataConfiguration(["src/Models"], true);
@@ -47,7 +47,7 @@ abstract class ModelTestCase extends \PHPUnit_Extensions_Database_TestCase
                 $schemaTool->updateSchema($metaData);
             }
 
-            $this->connection = $this->createDefaultDBConnection(self::$pdo, $GLOBALS["DB_NAME"]);
+            $this->connection = $this->createDefaultDBConnection(self::$pdo, getenv('DB_NAME'));
         }
 
         // It is important to clear the cache of the entity manager every time a new test runs!