Added/Updated tests\bugs\gh_8241_test.py: Checked on 6.0.0.450-8591572, 5.0.2.1493-eb720e8.

tests/bugs/gh_8241_test.py

@@ -0,0 +1,54 @@
+#coding:utf-8
+"""
+ID:          issue-8241
+ISSUE:       https://github.com/FirebirdSQL/firebird/issues/8241
+TITLE:       gbak may lose NULLs in restore
+DESCRIPTION: 
+NOTES:
+    Restore must use gbak utility, target DB must be prefixed by 'localhost:'.
+
+    Confirmed bug on 6.0.0.447, 5.0.2.1487
+    Checked on 6.0.0.450-8591572, 5.0.2.1493-eb720e8.
+"""
+
+import pytest
+from firebird.qa import *
+from pathlib import Path
+import time
+
+init_sql = """
+    create table t ("TABLE" integer);
+    insert into t values (null);
+    insert into t values (null);
+    commit;
+"""
+db = db_factory(init = init_sql)
+act = python_act('db')
+
+tmp_fbk = temp_file('tmp_8241.fbk')
+tmp_res = temp_file('tmp_8241.fdb')
+
+@pytest.mark.version('>=5.0.2')
+def test_1(act: Action, tmp_fbk: Path, tmp_res: Path, capsys):
+
+    with act.connect_server() as srv:
+        srv.database.set_sql_dialect(database=act.db.db_path, dialect=1)
+
+    act.gbak(switches=['-b', act.db.db_path, str(tmp_fbk)])
+    act.gbak(switches=['-rep', str(tmp_fbk), f'localhost:{act.db.db_path}'])
+
+    # NOTE! THIS PREVENTS FROM REPRODUCING BUG:
+    # DO NOT USE >>> act.gbak(switches=['-se', 'localhost:service_mgr', '-rep', str(tmp_fbk), act.db.db_path])
+
+    with act.db.connect() as con:
+        cur = con.cursor()
+        cur.execute('select "TABLE" from t')
+        for r in cur:
+            print(r[0])
+
+    act.expected_stdout = f"""
+        None
+        None
+    """
+    act.stdout = capsys.readouterr().out
+    assert act.clean_stdout == act.clean_expected_stdout