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recursion_test.py
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recursion_test.py
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# -*- coding: utf-8 -*-
#
# Copyright 2012-2015 Spotify AB
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
from __future__ import print_function
import datetime
import sys
import unittest
import luigi
import luigi.interface
from luigi.mock import MockFile
File = MockFile
class Popularity(luigi.Task):
date = luigi.DateParameter(default=datetime.date.today() - datetime.timedelta(1))
def output(self):
return File('/tmp/popularity/%s.txt' % self.date.strftime('%Y-%m-%d'))
def requires(self):
return Popularity(self.date - datetime.timedelta(1))
def run(self):
f = self.output().open('w')
for line in self.input().open('r'):
print(int(line.strip()) + 1, file=f)
f.close()
class RecursionTest(unittest.TestCase):
def setUp(self):
MockFile.fs.get_all_data()['/tmp/popularity/2009-01-01.txt'] = b'0\n'
def test_invoke(self):
w = luigi.worker.Worker()
w.add(Popularity(datetime.date(2010, 1, 1)))
w.run()
w.stop()
self.assertEqual(MockFile.fs.get_data('/tmp/popularity/2010-01-01.txt'), b'365\n')