connection: rename method to getTransactionNestedIndex() and add to i…

…nterface (BC break!)

src/Connection.php

@@ -270,15 +270,8 @@ public function rollbackTransaction(): void
 	}
 
 
-	/**
-	 * Returns current connection's transaction index.
-	 * 0 = no running transaction
-	 * 1 = basic transaction
-	 * >1 = nested transaction through savepoints
-	 * Todo: Add this method to interface in v4
-	 * @return int
-	 */
-	public function getTransactionIndex(): int
+	/** @inheritdoc */
+	public function getTransactionNestedIndex(): int
 	{
 		return $this->nestedTransactionIndex;
 	}

src/IConnection.php

@@ -133,6 +133,15 @@ public function commitTransaction(): void;
 	public function rollbackTransaction(): void;
 
 
+	/**
+	 * Returns current connection's transaction nested index.
+	 * 0 = no running transaction
+	 * 1 = basic transaction
+	 * >1 = nested transaction through save-points
+	 */
+	public function getTransactionNestedIndex(): int;
+
+
 	/**
 	 * Creates a savepoint.
 	 * @throws DriverException

tests/cases/integration/transactions.phpt

@@ -105,11 +105,11 @@ class TransactionsTest extends IntegrationTestCase
 
 		$this->connection->rollbackTransaction();
 		$this->connection->rollbackTransaction();
-		Assert::same(0, $this->connection->getTransactionIndex());
+		Assert::same(0, $this->connection->getTransactionNestedIndex());
 
 		$this->connection->commitTransaction();
 		$this->connection->commitTransaction();
-		Assert::same(0, $this->connection->getTransactionIndex());
+		Assert::same(0, $this->connection->getTransactionNestedIndex());
 	}