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fib_test.py
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fib_test.py
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# Copyright (c) 2012 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.
import luigi
import luigi.interface
import unittest
from luigi.mock import MockFile
File = MockFile
# Calculates Fibonacci numbers :)
class Fib(luigi.Task):
n = luigi.IntParameter(default=100)
def requires(self):
if self.n >= 2:
return [Fib(self.n - 1), Fib(self.n - 2)]
else:
return []
def output(self):
return File('/tmp/fib_%d' % self.n)
def run(self):
if self.n == 0:
s = 0
elif self.n == 1:
s = 1
else:
s = 0
for input in self.input():
for line in input.open('r'):
s += int(line.strip())
f = self.output().open('w')
f.write('%d\n' % s)
f.close()
class FibTestBase(unittest.TestCase):
def setUp(self):
global File
File = MockFile
MockFile._file_contents.clear()
class FibTest(FibTestBase):
def test_invoke(self):
w = luigi.worker.Worker()
w.add(Fib(100))
w.run()
w.stop()
self.assertEqual(MockFile._file_contents['/tmp/fib_10'], '55\n')
self.assertEqual(MockFile._file_contents['/tmp/fib_100'], '354224848179261915075\n')
def test_cmdline(self):
luigi.run(['--local-scheduler', 'Fib', '--n', '100'])
self.assertEqual(MockFile._file_contents['/tmp/fib_10'], '55\n')
self.assertEqual(MockFile._file_contents['/tmp/fib_100'], '354224848179261915075\n')
def test_build_internal(self):
luigi.build([Fib(100)], local_scheduler=True)
self.assertEqual(MockFile._file_contents['/tmp/fib_10'], '55\n')
self.assertEqual(MockFile._file_contents['/tmp/fib_100'], '354224848179261915075\n')
if __name__ == '__main__':
luigi.run()