added unit test

Author: MinuraPunchihewa

mindsdb_sql_parser/parser.py

@@ -78,6 +78,7 @@ class MindsDBParser(Parser):
        'delete',
        'evaluate',
        'drop_database',
+       'alter_database',
        'drop_view',
        'drop_table',
        'create_table',

tests/test_mindsdb/test_create_integration.py renamed to tests/test_mindsdb/test_databases.py

@@ -6,7 +6,7 @@
 from mindsdb_sql_parser.lexer import MindsDBLexer
 
 
-class TestCreateDatabase:
+class TestDatabases:
     def test_create_database_lexer(self):
         sql = "CREATE DATABASE IF NOT EXISTS db WITH ENGINE = 'mysql', PARAMETERS = {\"user\": \"admin\", \"password\": \"admin\"}"
         tokens = list(MindsDBLexer().tokenize(sql))
@@ -130,3 +130,12 @@ def test_create_database_using(self):
         assert str(ast).lower() == str(expected_ast).lower()
         assert ast.to_tree() == expected_ast.to_tree()
 
+
+    def test_alter_database(self):
+        sql = "ALTER DATABASE db PARAMETERS = {'A': 1, 'B': 2}"
+        ast = parse_sql(sql)
+
+        expected_ast = AlterDatabase(name=Identifier('db'), altered_params={'A': 1, 'B': 2})
+
+        assert str(ast) == str(expected_ast)
+        assert ast.to_tree() == expected_ast.to_tree()