boolean success = parser.parse(content, rootNode);
assertEquals(true, success);
assertEquals(1, rootNode.getChildCount());
AstNode childNode = rootNode.getChildren().get(0);
assertTrue(hasMixinType(childNode.getProperty(JcrLexicon.MIXIN_TYPES), TYPE_ALTER_TABLE_STATEMENT_POSTGRES));
assertEquals(4, childNode.getChildCount());
assertTrue(hasMixinType(childNode.getChild(2).getProperty(JcrLexicon.MIXIN_TYPES), TYPE_RENAME_COLUMN));
assertTrue(hasMixinType(childNode.getChild(3).getProperty(JcrLexicon.MIXIN_TYPES), TYPE_DROP_COLUMN_DEFINITION));
}