magic-wormhole-transit-relay/src/wormhole_transit_relay/test/test_database.py
2017-11-09 16:39:25 -08:00

140 lines
5.0 KiB
Python

from __future__ import print_function, unicode_literals
import os
from twisted.python import filepath
from twisted.trial import unittest
from .. import database
from ..database import get_db, TARGET_VERSION, dump_db, DBError
class Get(unittest.TestCase):
def test_create_default(self):
db_url = ":memory:"
db = get_db(db_url)
rows = db.execute("SELECT * FROM version").fetchall()
self.assertEqual(len(rows), 1)
self.assertEqual(rows[0]["version"], TARGET_VERSION)
def test_open_existing_file(self):
basedir = self.mktemp()
os.mkdir(basedir)
fn = os.path.join(basedir, "normal.db")
db = get_db(fn)
rows = db.execute("SELECT * FROM version").fetchall()
self.assertEqual(len(rows), 1)
self.assertEqual(rows[0]["version"], TARGET_VERSION)
db2 = get_db(fn)
rows = db2.execute("SELECT * FROM version").fetchall()
self.assertEqual(len(rows), 1)
self.assertEqual(rows[0]["version"], TARGET_VERSION)
def test_open_bad_version(self):
basedir = self.mktemp()
os.mkdir(basedir)
fn = os.path.join(basedir, "old.db")
db = get_db(fn)
db.execute("UPDATE version SET version=999")
db.commit()
with self.assertRaises(DBError) as e:
get_db(fn)
self.assertIn("Unable to handle db version 999", str(e.exception))
def test_open_corrupt(self):
basedir = self.mktemp()
os.mkdir(basedir)
fn = os.path.join(basedir, "corrupt.db")
with open(fn, "wb") as f:
f.write(b"I am not a database")
with self.assertRaises(DBError) as e:
get_db(fn)
self.assertIn("not a database", str(e.exception))
def test_failed_create_allows_subsequent_create(self):
patch = self.patch(database, "get_schema", lambda version: b"this is a broken schema")
dbfile = filepath.FilePath(self.mktemp())
self.assertRaises(Exception, lambda: get_db(dbfile.path))
patch.restore()
get_db(dbfile.path)
def OFF_test_upgrade(self): # disabled until we add a v2 schema
basedir = self.mktemp()
os.mkdir(basedir)
fn = os.path.join(basedir, "upgrade.db")
self.assertNotEqual(TARGET_VERSION, 2)
# create an old-version DB in a file
db = get_db(fn, 2)
rows = db.execute("SELECT * FROM version").fetchall()
self.assertEqual(len(rows), 1)
self.assertEqual(rows[0]["version"], 2)
del db
# then upgrade the file to the latest version
dbA = get_db(fn, TARGET_VERSION)
rows = dbA.execute("SELECT * FROM version").fetchall()
self.assertEqual(len(rows), 1)
self.assertEqual(rows[0]["version"], TARGET_VERSION)
dbA_text = dump_db(dbA)
del dbA
# make sure the upgrades got committed to disk
dbB = get_db(fn, TARGET_VERSION)
dbB_text = dump_db(dbB)
del dbB
self.assertEqual(dbA_text, dbB_text)
# The upgraded schema should be equivalent to that of a new DB.
# However a text dump will differ because ALTER TABLE always appends
# the new column to the end of a table, whereas our schema puts it
# somewhere in the middle (wherever it fits naturally). Also ALTER
# TABLE doesn't include comments.
if False:
latest_db = get_db(":memory:", TARGET_VERSION)
latest_text = dump_db(latest_db)
with open("up.sql","w") as f: f.write(dbA_text)
with open("new.sql","w") as f: f.write(latest_text)
# check with "diff -u _trial_temp/up.sql _trial_temp/new.sql"
self.assertEqual(dbA_text, latest_text)
class Create(unittest.TestCase):
def test_memory(self):
db = database.create_db(":memory:")
latest_text = dump_db(db)
self.assertIn("CREATE TABLE", latest_text)
def test_preexisting(self):
basedir = self.mktemp()
os.mkdir(basedir)
fn = os.path.join(basedir, "preexisting.db")
with open(fn, "w"):
pass
with self.assertRaises(database.DBAlreadyExists):
database.create_db(fn)
def test_create(self):
basedir = self.mktemp()
os.mkdir(basedir)
fn = os.path.join(basedir, "created.db")
db = database.create_db(fn)
latest_text = dump_db(db)
self.assertIn("CREATE TABLE", latest_text)
class Open(unittest.TestCase):
def test_open(self):
basedir = self.mktemp()
os.mkdir(basedir)
fn = os.path.join(basedir, "created.db")
db1 = database.create_db(fn)
latest_text = dump_db(db1)
self.assertIn("CREATE TABLE", latest_text)
db2 = database.open_existing_db(fn)
self.assertIn("CREATE TABLE", dump_db(db2))
def test_doesnt_exist(self):
basedir = self.mktemp()
os.mkdir(basedir)
fn = os.path.join(basedir, "created.db")
with self.assertRaises(database.DBDoesntExist):
database.open_existing_db(fn)