Add skip_cleanup_if_failed option for not cleaning up failed tests (#30)

* Add no_cleanup_failed option for not cleaning up failed tests

* Update to handle all databases

* Change name from 'no_cleanup_failed' to 'skip_cleanup_if_failed'

Author: Archanium

src/Codeception/Module/Db.php

@@ -55,7 +55,7 @@
  * * ssl_cipher - list of one or more permissible ciphers to use for SSL encryption (MySQL specific, @see http://php.net/manual/de/ref.pdo-mysql.php#pdo.constants.mysql-attr-cipher)
  * * databases - include more database configs and switch between them in tests.
  * * initial_queries - list of queries to be executed right after connection to the database has been initiated, i.e. creating the database if it does not exist or preparing the database collation
- *
+ * * skip_cleanup_if_failed - Do not perform the cleanup if the tests failed. If this is used, manual cleanup might be required when re-running
  * ## Example
  *
  *     modules:
@@ -69,6 +69,7 @@
  *              cleanup: true
  *              reconnect: true
  *              waitlock: 10
+ *              skip_cleanup_if_failed: true
  *              ssl_key: '/path/to/client-key.pem'
  *              ssl_cert: '/path/to/client-cert.pem'
  *              ssl_ca: '/path/to/ca-cert.pem'
@@ -253,6 +254,7 @@ class Db extends CodeceptionModule implements DbInterface
         'waitlock' => 0,
         'dump' => null,
         'populator' => null,
+        'skip_cleanup_if_failed' => false,
     ];
 
     /**
@@ -614,6 +616,15 @@ public function _before(TestInterface $test)
         parent::_before($test);
     }
 
+    public function _failed(TestInterface $test, $fail)
+    {
+        foreach ($this->getDatabases() as $databaseKey => $databaseConfig) {
+            if (!empty($databaseConfig['skip_cleanup_if_failed'])) {
+                $this->insertedRows[$databaseKey] = [];
+            }
+        }
+    }
+
     public function _after(TestInterface $test)
     {
         $this->removeInsertedForDatabases();
@@ -723,7 +734,8 @@ protected function loadDumpUsingDriver($databaseKey)
     }
 
     /**
-     * Inserts an SQL record into a database. This record will be erased after the test.
+     * Inserts an SQL record into a database. This record will be erased after the test, 
+     * unless you've configured "skip_cleanup_if_failed", and the test fails. 
      *
      * ```php
      * <?php