Remove Phpunit/Dbunit

- Introduce own Yaml-to-SQL class
- Introduce new way of MySQL-DB-tests (per rollback)
- Remove dependency phpunit/dbunit
- Introduce new dev-dependency for YAML-ready (Symfony YAML reader)

tests/DatabaseTest.php

@@ -6,41 +6,28 @@
 namespace Friendica\Test;
 
 use Friendica\Test\Util\Database\StaticDatabase;
-use PHPUnit\DbUnit\DataSet\YamlDataSet;
-use PHPUnit\DbUnit\TestCaseTrait;
-use PHPUnit_Extensions_Database_DB_IDatabaseConnection;
 
 /**
  * Abstract class used by tests that need a database.
  */
 abstract class DatabaseTest extends MockedTest
 {
-	use TestCaseTrait;
-
-	/**
-	 * Get database connection.
-	 *
-	 * This function is executed before each test in order to get a database connection that can be used by tests.
-	 * If no prior connection is available, it tries to create one using the USER, PASS and DB environment variables.
-	 *
-	 * If it could not connect to the database, the test is skipped.
-	 *
-	 * @return PHPUnit_Extensions_Database_DB_IDatabaseConnection
-	 * @see https://phpunit.de/manual/5.7/en/database.html
-	 */
-	protected function getConnection()
+	protected function setUp()
 	{
-		return $this->createDefaultDBConnection(StaticDatabase::getGlobConnection(), getenv('MYSQL_DATABASE'));
+		parent::setUp();
+
+		StaticDatabase::statConnect($_SERVER);
+		// Rollbacks every DB usage (in case the test couldn't call tearDown)
+		StaticDatabase::statRollback();
+		// Start the first, outer transaction
+		StaticDatabase::getGlobConnection()->beginTransaction();
 	}
 
-	/**
-	 * Get dataset to populate the database with.
-	 *
-	 * @return YamlDataSet
-	 * @see https://phtablepunit.de/manual/5.7/en/database.html
-	 */
-	protected function getDataSet()
+	protected function tearDown()
 	{
-		return new YamlDataSet(__DIR__ . '/datasets/api.yml');
+		// Rollbacks every DB usage so we don't commit anything into the DB
+		StaticDatabase::statRollback();
+
+		parent::tearDown();
 	}
 }