Fix FunctionalTestCase (see #5)

Description
-----------

Unfortunately, #4 got merged without the changes we discussed, but here they are …

Commits
-------

03516da2 Fix FunctionalTestCase
6022d29e Fix method name
85e014d5 Boot kernel when resetting database

test-case/src/FunctionalTestCase.php

@@ -11,7 +11,7 @@
 
 abstract class FunctionalTestCase extends WebTestCase
 {
-    protected function loadFixture(string $yamlFile, bool $resetDatabase = true): void
+    protected static function loadFixtures(array $yamlFiles, bool $truncateTables = true): void
     {
         self::bootKernel();
 
@@ -20,35 +20,34 @@ protected function loadFixture(string $yamlFile, bool $resetDatabase = true): vo
         /** @var Connection $connection */
         $connection = $doctrine->getConnection();
 
-        if ($resetDatabase) {
-            $this->resetDatabase();
-        }
-
-        $data = Yaml::parseFile($yamlFile);
-
-        foreach ($data as $table => $rows) {
-            foreach ($rows as $row) {
-                if ('sql' === $table) {
-                    $connection->exec($row);
-                    continue;
-                }
+        if ($truncateTables) {
+            $platform = $connection->getDatabasePlatform();
 
-                $connection->insert($table, $row);
+            /** @var Table $table */
+            foreach ($connection->getSchemaManager()->listTables() as $table) {
+                $connection->exec($platform->getTruncateTableSQL($table->getName()));
             }
         }
+
+        foreach ($yamlFiles as $file) {
+            self::importFixture($connection, $file);
+        }
     }
 
-    private function resetDatabase(): void
+    protected static function resetDatabaseSchema(): void
     {
+        self::bootKernel();
+
         $doctrine = self::$container->get('doctrine');
 
         /** @var Connection $connection */
         $connection = $doctrine->getConnection();
         $schemaManager = $connection->getSchemaManager();
+        $platform = $connection->getDatabasePlatform();
 
         /** @var Table $table */
         foreach ($schemaManager->listTables() as $table) {
-            $connection->exec('DROP TABLE '.$table->getName());
+            $connection->exec($platform->getDropTableSQL($table));
         }
 
         /** @var EntityManagerInterface $manager */
@@ -58,4 +57,20 @@ private function resetDatabase(): void
         $tool = new SchemaTool($manager);
         $tool->createSchema($metadata);
     }
+
+    private static function importFixture(Connection $connection, string $file)
+    {
+        $data = Yaml::parseFile($file);
+
+        foreach ($data as $table => $rows) {
+            foreach ($rows as $row) {
+                if ('sql' === $table) {
+                    $connection->exec($row);
+                    continue;
+                }
+
+                $connection->insert($table, $row);
+            }
+        }
+    }
 }