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"""Tests for db backends
Authors:
* Min RK
"""
#-------------------------------------------------------------------------------
# Copyright (C) 2011 The IPython Development Team
#
# Distributed under the terms of the BSD License. The full license is in
# the file COPYING, distributed as part of this software.
#-------------------------------------------------------------------------------
#-------------------------------------------------------------------------------
# Imports
#-------------------------------------------------------------------------------
from __future__ import division
import logging
import os
import tempfile
import time
from datetime import datetime, timedelta
from unittest import TestCase
from IPython.parallel import error
from IPython.parallel.controller.dictdb import DictDB
from IPython.parallel.controller.sqlitedb import SQLiteDB
from IPython.parallel.controller.hub import init_record, empty_record
from IPython.testing import decorators as dec
from IPython.zmq.session import Session
#-------------------------------------------------------------------------------
# TestCases
#-------------------------------------------------------------------------------
def setup():
global temp_db
temp_db = tempfile.NamedTemporaryFile(suffix='.db').name
class TestDictBackend(TestCase):
def setUp(self):
self.session = Session()
self.db = self.create_db()
self.load_records(16)
def create_db(self):
return DictDB()
def load_records(self, n=1):
"""load n records for testing"""
#sleep 1/10 s, to ensure timestamp is different to previous calls
time.sleep(0.1)
msg_ids = []
for i in range(n):
msg = self.session.msg('apply_request', content=dict(a=5))
msg['buffers'] = []
rec = init_record(msg)
msg_id = msg['header']['msg_id']
msg_ids.append(msg_id)
self.db.add_record(msg_id, rec)
return msg_ids
def test_add_record(self):
before = self.db.get_history()
self.load_records(5)
after = self.db.get_history()
self.assertEquals(len(after), len(before)+5)
self.assertEquals(after[:-5],before)
def test_drop_record(self):
msg_id = self.load_records()[-1]
rec = self.db.get_record(msg_id)
self.db.drop_record(msg_id)
self.assertRaises(KeyError,self.db.get_record, msg_id)
def _round_to_millisecond(self, dt):
"""necessary because mongodb rounds microseconds"""
micro = dt.microsecond
extra = int(str(micro)[-3:])
return dt - timedelta(microseconds=extra)
def test_update_record(self):
now = self._round_to_millisecond(datetime.now())
#
msg_id = self.db.get_history()[-1]
rec1 = self.db.get_record(msg_id)
data = {'stdout': 'hello there', 'completed' : now}
self.db.update_record(msg_id, data)
rec2 = self.db.get_record(msg_id)
self.assertEquals(rec2['stdout'], 'hello there')
self.assertEquals(rec2['completed'], now)
rec1.update(data)
self.assertEquals(rec1, rec2)
# def test_update_record_bad(self):
# """test updating nonexistant records"""
# msg_id = str(uuid.uuid4())
# data = {'stdout': 'hello there'}
# self.assertRaises(KeyError, self.db.update_record, msg_id, data)
def test_find_records_dt(self):
"""test finding records by date"""
hist = self.db.get_history()
middle = self.db.get_record(hist[len(hist)//2])
tic = middle['submitted']
before = self.db.find_records({'submitted' : {'$lt' : tic}})
after = self.db.find_records({'submitted' : {'$gte' : tic}})
self.assertEquals(len(before)+len(after),len(hist))
for b in before:
self.assertTrue(b['submitted'] < tic)
for a in after:
self.assertTrue(a['submitted'] >= tic)
same = self.db.find_records({'submitted' : tic})
for s in same:
self.assertTrue(s['submitted'] == tic)
def test_find_records_keys(self):
"""test extracting subset of record keys"""
found = self.db.find_records({'msg_id': {'$ne' : ''}},keys=['submitted', 'completed'])
for rec in found:
self.assertEquals(set(rec.keys()), set(['msg_id', 'submitted', 'completed']))
def test_find_records_msg_id(self):
"""ensure msg_id is always in found records"""
found = self.db.find_records({'msg_id': {'$ne' : ''}},keys=['submitted', 'completed'])
for rec in found:
self.assertTrue('msg_id' in rec.keys())
found = self.db.find_records({'msg_id': {'$ne' : ''}},keys=['submitted'])
for rec in found:
self.assertTrue('msg_id' in rec.keys())
found = self.db.find_records({'msg_id': {'$ne' : ''}},keys=['msg_id'])
for rec in found:
self.assertTrue('msg_id' in rec.keys())
def test_find_records_in(self):
"""test finding records with '$in','$nin' operators"""
hist = self.db.get_history()
even = hist[::2]
odd = hist[1::2]
recs = self.db.find_records({ 'msg_id' : {'$in' : even}})
found = [ r['msg_id'] for r in recs ]
self.assertEquals(set(even), set(found))
recs = self.db.find_records({ 'msg_id' : {'$nin' : even}})
found = [ r['msg_id'] for r in recs ]
self.assertEquals(set(odd), set(found))
def test_get_history(self):
msg_ids = self.db.get_history()
latest = datetime(1984,1,1)
for msg_id in msg_ids:
rec = self.db.get_record(msg_id)
newt = rec['submitted']
self.assertTrue(newt >= latest)
latest = newt
msg_id = self.load_records(1)[-1]
self.assertEquals(self.db.get_history()[-1],msg_id)
def test_datetime(self):
"""get/set timestamps with datetime objects"""
msg_id = self.db.get_history()[-1]
rec = self.db.get_record(msg_id)
self.assertTrue(isinstance(rec['submitted'], datetime))
self.db.update_record(msg_id, dict(completed=datetime.now()))
rec = self.db.get_record(msg_id)
self.assertTrue(isinstance(rec['completed'], datetime))
def test_drop_matching(self):
msg_ids = self.load_records(10)
query = {'msg_id' : {'$in':msg_ids}}
self.db.drop_matching_records(query)
recs = self.db.find_records(query)
self.assertEquals(len(recs), 0)
def test_null(self):
"""test None comparison queries"""
msg_ids = self.load_records(10)
query = {'msg_id' : None}
recs = self.db.find_records(query)
self.assertEquals(len(recs), 0)
query = {'msg_id' : {'$ne' : None}}
recs = self.db.find_records(query)
self.assertTrue(len(recs) >= 10)
def test_pop_safe_get(self):
"""editing query results shouldn't affect record [get]"""
msg_id = self.db.get_history()[-1]
rec = self.db.get_record(msg_id)
rec.pop('buffers')
rec['garbage'] = 'hello'
rec['header']['msg_id'] = 'fubar'
rec2 = self.db.get_record(msg_id)
self.assertTrue('buffers' in rec2)
self.assertFalse('garbage' in rec2)
self.assertEquals(rec2['header']['msg_id'], msg_id)
def test_pop_safe_find(self):
"""editing query results shouldn't affect record [find]"""
msg_id = self.db.get_history()[-1]
rec = self.db.find_records({'msg_id' : msg_id})[0]
rec.pop('buffers')
rec['garbage'] = 'hello'
rec['header']['msg_id'] = 'fubar'
rec2 = self.db.find_records({'msg_id' : msg_id})[0]
self.assertTrue('buffers' in rec2)
self.assertFalse('garbage' in rec2)
self.assertEquals(rec2['header']['msg_id'], msg_id)
def test_pop_safe_find_keys(self):
"""editing query results shouldn't affect record [find+keys]"""
msg_id = self.db.get_history()[-1]
rec = self.db.find_records({'msg_id' : msg_id}, keys=['buffers', 'header'])[0]
rec.pop('buffers')
rec['garbage'] = 'hello'
rec['header']['msg_id'] = 'fubar'
rec2 = self.db.find_records({'msg_id' : msg_id})[0]
self.assertTrue('buffers' in rec2)
self.assertFalse('garbage' in rec2)
self.assertEquals(rec2['header']['msg_id'], msg_id)
class TestSQLiteBackend(TestDictBackend):
@dec.skip_without('sqlite3')
def create_db(self):
location, fname = os.path.split(temp_db)
log = logging.getLogger('test')
log.setLevel(logging.CRITICAL)
return SQLiteDB(location=location, fname=fname, log=log)
def tearDown(self):
self.db._db.close()
def teardown():
"""cleanup task db file after all tests have run"""
try:
os.remove(temp_db)
except:
pass
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