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Copy pathbackup.py
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135 lines (106 loc) · 4.81 KB
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import os
import sqlite3 as sqlite
from tempfile import NamedTemporaryFile
import unittest
@unittest.skipIf(sqlite.sqlite_version_info < (3, 6, 11), "Backup API not supported")
class BackupTests(unittest.TestCase):
def setUp(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()
def tearDown(self):
self.cx.close()
def testBackup(self, bckfn):
cx = sqlite.connect(bckfn)
result = cx.execute("SELECT key FROM foo ORDER BY key").fetchall()
self.assertEqual(result[0][0], 3)
self.assertEqual(result[1][0], 4)
def CheckKeywordOnlyArgs(self):
with self.assertRaises(TypeError):
self.cx.backup('foo', 1)
def CheckSimple(self):
with NamedTemporaryFile(suffix='.sqlite') as bckfn:
self.cx.backup(bckfn.name)
self.testBackup(bckfn.name)
def CheckProgress(self):
journal = []
def progress(status, remaining, total):
journal.append(status)
with NamedTemporaryFile(suffix='.sqlite') as bckfn:
self.cx.backup(bckfn.name, pages=1, progress=progress)
self.testBackup(bckfn.name)
self.assertEqual(len(journal), 2)
self.assertEqual(journal[0], sqlite.SQLITE_OK)
self.assertEqual(journal[1], sqlite.SQLITE_DONE)
def CheckProgressAllPagesAtOnce_0(self):
journal = []
def progress(status, remaining, total):
journal.append(remaining)
with NamedTemporaryFile(suffix='.sqlite') as bckfn:
self.cx.backup(bckfn.name, progress=progress)
self.testBackup(bckfn.name)
self.assertEqual(len(journal), 1)
self.assertEqual(journal[0], 0)
def CheckProgressAllPagesAtOnce_1(self):
journal = []
def progress(status, remaining, total):
journal.append(remaining)
with NamedTemporaryFile(suffix='.sqlite') as bckfn:
self.cx.backup(bckfn.name, pages=-1, progress=progress)
self.testBackup(bckfn.name)
self.assertEqual(len(journal), 1)
self.assertEqual(journal[0], 0)
def CheckNonCallableProgress(self):
with NamedTemporaryFile(suffix='.sqlite') as bckfn:
with self.assertRaises(TypeError) as err:
self.cx.backup(bckfn.name, pages=1, progress='bar')
self.assertEqual(str(err.exception), 'progress argument must be a callable')
def CheckModifyingProgress(self):
journal = []
def progress(status, remaining, total):
if not journal:
self.cx.execute('INSERT INTO foo (key) VALUES (?)', (remaining+1000,))
self.cx.commit()
journal.append(remaining)
with NamedTemporaryFile(suffix='.sqlite') as bckfn:
self.cx.backup(bckfn.name, pages=1, progress=progress)
self.testBackup(bckfn.name)
cx = sqlite.connect(bckfn.name)
result = cx.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)
def CheckFailingProgress(self):
def progress(status, remaining, total):
raise SystemError('nearly out of space')
with NamedTemporaryFile(suffix='.sqlite', delete=False) as bckfn:
with self.assertRaises(SystemError) as err:
self.cx.backup(bckfn.name, progress=progress)
self.assertEqual(str(err.exception), 'nearly out of space')
self.assertFalse(os.path.exists(bckfn.name))
def CheckDatabaseSourceName(self):
with NamedTemporaryFile(suffix='.sqlite', delete=False) as bckfn:
self.cx.backup(bckfn.name, name='main')
self.cx.backup(bckfn.name, name='temp')
with self.assertRaises(sqlite.OperationalError):
self.cx.backup(bckfn.name, name='non-existing')
self.assertFalse(os.path.exists(bckfn.name))
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()
with NamedTemporaryFile(suffix='.sqlite') as bckfn:
self.cx.backup(bckfn.name, name='attached_db')
self.testBackup(bckfn.name)
def suite():
return unittest.TestSuite(unittest.makeSuite(BackupTests, "Check"))
def test():
runner = unittest.TextTestRunner()
runner.run(suite())
if __name__ == "__main__":
test()