test_wal_preservation: add debugging for macOS and iOS failures

Author: qris

Lib/test/test_sqlite3/test_dbapi.py

@@ -728,26 +728,34 @@ def test_database_keyword(self):
         with contextlib.closing(sqlite.connect(database=":memory:")) as cx:
             self.assertEqual(type(cx), sqlite.Connection)
 
-    @unittest.skipIf(sys.platform == "darwin", "skipped on macOS")
+    # @hashbrowncipher skipped this test on mac, don't know why, rerunning to test it
     def test_wal_preservation(self):
         with tempfile.TemporaryDirectory() as dirname:
             path = os.path.join(dirname, "db.sqlite")
             with contextlib.closing(sqlite.connect(path)) as cx:
                 cx.file_control(sqlite.SQLITE_FCNTL_PERSIST_WAL, 1)
+                # Check that it was set successfully:
+                rc = cx.file_control(sqlite.SQLITE_FCNTL_PERSIST_WAL, -1)
+                assert rc == 1, f"cx.file_control(SQLITE_FCNTL_PERSIST_WAL) failed to set flag"
+
                 cu = cx.cursor()
-                cu.execute("PRAGMA journal_mode = WAL")
+                result = cu.execute("PRAGMA journal_mode = WAL").fetchall()
+                assert result == [('wal',)], f"journal_mode could not be set to WAL, is {result}"
                 cu.execute("CREATE TABLE foo (id int)")
                 cu.execute("INSERT INTO foo (id) VALUES (1)")
                 self.assertTrue(os.path.exists(path + "-wal"))
             self.assertTrue(os.path.exists(path + "-wal"))
 
             with contextlib.closing(sqlite.connect(path)) as cx:
+                # Check that we can read the default value when we didn't set it explicitly:
+                rc = cx.file_control(sqlite.SQLITE_FCNTL_PERSIST_WAL, -1)
+                assert rc == 0, f"SQLITE_FCNTL_PERSIST_WAL should be off by default"
+
                 cu = cx.cursor()
                 self.assertTrue(os.path.exists(path + "-wal"))
                 cu.execute("INSERT INTO foo (id) VALUES (2)")
             self.assertFalse(os.path.exists(path + "-wal"))
 
-
     def test_file_control_raises(self):
         with memory_database() as cx:
             with self.assertRaises(sqlite.InternalError):