Added/Updated tests\bugs\gh_6413_test.py: Confirmed on 6.0.0.799.

Author: pavel-zotov

tests/bugs/gh_6413_test.py

@@ -0,0 +1,92 @@
+#coding:utf-8
+
+"""
+ID:          n/a
+ISSUE:       https://github.com/FirebirdSQL/firebird/issues/6413
+TITLE:       Data pages of newly gbak restored databases should be marked as "swept"
+DESCRIPTION:
+NOTES:
+    [17.07.2025] pzotov
+    Test adds a table and fill it with some data.
+    Then we make b/r and obtain statistics using 'gstat -d ...'
+    Output will contain lines like: "Primary pages: 1, secondary pages: 1, swept pages: 1"
+    We have to check that in every such line value of primary pages is equal to swept pages
+    or it can be greater but NO MORE than for <MAX_NUM_OF_EMPTY_PAGES> because of pages
+    allocation algorithm.
+
+    Explained by Vlad, 17.07.2025 16:34.
+    Confirmed on 6.0.0.799
+    Checked on 6.0.0.1020 ; 5.0.3.1683
+"""
+import string
+import locale
+import re
+from io import BytesIO
+from firebird.driver import SrvRestoreFlag
+import pytest
+from firebird.qa import *
+
+init_sql = """
+    set bail on;
+    recreate table test(id int generated by default as identity, s varchar(32760));
+    set term ^;
+    execute block as
+        declare n int = 1000;
+        declare i int = 0;
+    begin
+        while (i < n) do
+        begin
+            insert into test(s) values(lpad('', rand()*32760, uuid_to_char(gen_uuid())));
+            i = i + 1;
+        end
+    end^
+    set term ;^
+    commit;
+"""
+db = db_factory(init = init_sql, charset = 'win1251', page_size = 8192)
+
+act = python_act('db')
+
+#-----------------------------------------------------------
+
+REMOVE_PUNCT = str.maketrans('', '', string.punctuation)
+MAX_NUM_OF_EMPTY_PAGES = 7
+EXPECTED_MSG = f'Expected: no lines with difference between primary and swept pages GREATER than {MAX_NUM_OF_EMPTY_PAGES}'
+
+@pytest.mark.version('>=5.0.3')
+def test_1(act: Action, capsys):
+    backup = BytesIO()
+    with act.connect_server() as srv:
+        srv.database.local_backup(database = act.db.db_path, backup_stream = backup)
+        backup.seek(0)
+        srv.database.local_restore(backup_stream = backup, database = act.db.db_path, flags = SrvRestoreFlag.REPLACE)
+
+    act.gstat(switches=['-d' ], io_enc = locale.getpreferredencoding())
+    # Primary pages: 1, secondary pages: 1, swept pages: 1
+    #   0       1    2      3       4    5    6      7   8
+    p_swept_pages = re.compile(r'Primary pages(:)?\s+\d+.*swept pages(:)?\s+\d+', re.IGNORECASE)
+    non_swept_line_indices = []
+    for idx, line in enumerate(act.stdout.splitlines()):
+        if p_swept_pages.search(line):
+            tokens = line.split()
+            if len(tokens) >= 9:
+                try:
+                    primary_pages_count = int(tokens[2].translate(REMOVE_PUNCT))
+                    swept_pages_count = int(tokens[8].translate(REMOVE_PUNCT))
+                    if primary_pages_count - swept_pages_count > MAX_NUM_OF_EMPTY_PAGES:
+                        non_swept_line_indices.append( (idx, line) )
+                except ValueError as e:
+                    print(e.__str__())
+            else:
+                print('Line does not contain all expected tokens: "{line=}"')
+
+    if non_swept_line_indices:
+        print(f'At least one line contains difference between primary and swept pages GREATER than {MAX_NUM_OF_EMPTY_PAGES}:')
+        for p in non_swept_line_indices:
+            print(f'Line #{p[0]}, text: {p[1].strip()}')
+    else:
+        print(EXPECTED_MSG)
+
+    act.expected_stdout = EXPECTED_MSG
+    act.stdout = capsys.readouterr().out
+    assert act.clean_stdout == act.clean_expected_stdout