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test_backup.py
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importsqlite3assqlite
importunittest
from .utilimportmemory_database
classBackupTests(unittest.TestCase):
defsetUp(self):
cx=self.cx=sqlite.connect(":memory:")
cx.execute('CREATE TABLE foo (key INTEGER)')
cx.executemany('INSERT INTO foo (key) VALUES (?)', [(3,), (4,)])
cx.commit()
deftearDown(self):
self.cx.close()
defverify_backup(self, bckcx):
result=bckcx.execute("SELECT key FROM foo ORDER BY key").fetchall()
self.assertEqual(result[0][0], 3)
self.assertEqual(result[1][0], 4)
deftest_bad_target(self):
withself.assertRaises(TypeError):
self.cx.backup(None)
withself.assertRaises(TypeError):
self.cx.backup()
deftest_bad_target_filename(self):
withself.assertRaises(TypeError):
self.cx.backup('some_file_name.db')
deftest_bad_target_same_connection(self):
withself.assertRaises(ValueError):
self.cx.backup(self.cx)
deftest_bad_target_closed_connection(self):
withmemory_database() asbck:
bck.close()
withself.assertRaises(sqlite.ProgrammingError):
self.cx.backup(bck)
deftest_bad_source_closed_connection(self):
withmemory_database() asbck:
source=sqlite.connect(":memory:")
source.close()
withself.assertRaises(sqlite.ProgrammingError):
source.backup(bck)
deftest_bad_target_in_transaction(self):
withmemory_database() asbck:
bck.execute('CREATE TABLE bar (key INTEGER)')
bck.executemany('INSERT INTO bar (key) VALUES (?)', [(3,), (4,)])
withself.assertRaises(sqlite.OperationalError) ascm:
self.cx.backup(bck)
deftest_keyword_only_args(self):
withself.assertRaises(TypeError):
withmemory_database() asbck:
self.cx.backup(bck, 1)
deftest_simple(self):
withmemory_database() asbck:
self.cx.backup(bck)
self.verify_backup(bck)
deftest_progress(self):
journal= []
defprogress(status, remaining, total):
journal.append(status)
withmemory_database() asbck:
self.cx.backup(bck, pages=1, progress=progress)
self.verify_backup(bck)
self.assertEqual(len(journal), 2)
self.assertEqual(journal[0], sqlite.SQLITE_OK)
self.assertEqual(journal[1], sqlite.SQLITE_DONE)
deftest_progress_all_pages_at_once_1(self):
journal= []
defprogress(status, remaining, total):
journal.append(remaining)
withmemory_database() asbck:
self.cx.backup(bck, progress=progress)
self.verify_backup(bck)
self.assertEqual(len(journal), 1)
self.assertEqual(journal[0], 0)
deftest_progress_all_pages_at_once_2(self):
journal= []
defprogress(status, remaining, total):
journal.append(remaining)
withmemory_database() asbck:
self.cx.backup(bck, pages=-1, progress=progress)
self.verify_backup(bck)
self.assertEqual(len(journal), 1)
self.assertEqual(journal[0], 0)
deftest_non_callable_progress(self):
withself.assertRaises(TypeError) ascm:
withmemory_database() asbck:
self.cx.backup(bck, pages=1, progress='bar')
self.assertEqual(str(cm.exception), 'progress argument must be a callable')
deftest_modifying_progress(self):
journal= []
defprogress(status, remaining, total):
ifnotjournal:
self.cx.execute('INSERT INTO foo (key) VALUES (?)', (remaining+1000,))
self.cx.commit()
journal.append(remaining)
withmemory_database() asbck:
self.cx.backup(bck, pages=1, progress=progress)
self.verify_backup(bck)
result=bck.execute("SELECT key FROM foo"
" WHERE key >= 1000"
" ORDER BY key").fetchall()
self.assertEqual(result[0][0], 1001)
self.assertEqual(len(journal), 3)
self.assertEqual(journal[0], 1)
self.assertEqual(journal[1], 1)
self.assertEqual(journal[2], 0)
deftest_failing_progress(self):
defprogress(status, remaining, total):
raiseSystemError('nearly out of space')
withself.assertRaises(SystemError) aserr:
withmemory_database() asbck:
self.cx.backup(bck, progress=progress)
self.assertEqual(str(err.exception), 'nearly out of space')
deftest_database_source_name(self):
withmemory_database() asbck:
self.cx.backup(bck, name='main')
withmemory_database() asbck:
self.cx.backup(bck, name='temp')
withself.assertRaises(sqlite.OperationalError) ascm:
withmemory_database() asbck:
self.cx.backup(bck, name='non-existing')
self.assertIn("unknown database", str(cm.exception))
self.cx.execute("ATTACH DATABASE ':memory:' AS attached_db")
self.cx.execute('CREATE TABLE attached_db.foo (key INTEGER)')
self.cx.executemany('INSERT INTO attached_db.foo (key) VALUES (?)', [(3,), (4,)])
self.cx.commit()
withmemory_database() asbck:
self.cx.backup(bck, name='attached_db')
self.verify_backup(bck)
if__name__=="__main__":
unittest.main()
