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#
# Copyright Applied Language Solutions 2012
#
# This file is part of Pypeline.
#
# Pypeline is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pypeline is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Pypeline. If not, see <http://www.gnu.org/licenses/>.
#
#
# Unit tests for building a pipeline using the helper functions.
# The pipeline is a mixture of components that are sub-processes and plain old
# Python functions.
#
import os
import subprocess
import sys
import unittest
from concurrent.futures import ThreadPoolExecutor
from pypeline.helpers.parallel_helpers import cons_function_component, \
cons_wire, \
cons_dictionary_wire, \
cons_split_wire, \
cons_unsplit_wire, \
run_pipeline, \
eval_pipeline, \
exec_pipeline
class ParallelPypelineHelperUnitTest(unittest.TestCase):
@staticmethod
def test(no_workers, pipeline, input, state, run_function = run_pipeline):
executor = ThreadPoolExecutor(max_workers = no_workers)
result = run_function(executor, pipeline, input, state)
executor.shutdown(True)
return result
def test_serial_pypeline_with_function_components(self):
rev_msg_one = "reverse(1)"
rev_msg_two = "reverse(2)"
upper_msg = "upper"
reverse_function = lambda a, s: a[::-1]
upper_function = lambda a, s: a.upper()
comp_rev_one = cons_function_component(reverse_function,
state_mutator = lambda s: s.append(rev_msg_one) or s)
comp_rev_two = cons_function_component(reverse_function,
state_mutator = lambda s: s.append(rev_msg_two) or s)
comp_upper = cons_function_component(upper_function,
state_mutator = lambda s: s.append(upper_msg) or s)
pipeline = comp_rev_one >> comp_rev_two >> comp_upper
value = "hello world"
target = (upper_function(value, None), [rev_msg_one, rev_msg_two, upper_msg])
result = ParallelPypelineHelperUnitTest.test(2, pipeline, "hello world", list())
self.assertEquals(target, result)
def test_parallel_pypeline_with_split_and_unsplit_wires(self):
rev_msg_one = "reverse(top)"
rev_msg_two = "reverse(bottom)"
top_msg = "top"
bottom_msg = "bottom"
reverse_func = lambda a, s: a[::-1]
top_func = lambda a, s: " ".join([a, top_msg])
bottom_func = lambda a, s: " ".join([a, bottom_msg])
comp_rev_top = cons_function_component(reverse_func,
state_mutator = lambda s: s.append(rev_msg_one) or s)
comp_rev_bottom = cons_function_component(reverse_func,
state_mutator = lambda s: s.append(rev_msg_two) or s)
comp_para_top = cons_function_component(top_func,
state_mutator = lambda s: s.append(top_msg) or s)
comp_para_bottom = cons_function_component(bottom_func,
state_mutator = lambda s: s.append(bottom_msg) or s)
unsplit_func = lambda t, b: {'top': t, 'bottom': b}
pipeline = (comp_rev_top & comp_rev_bottom) >> \
(comp_para_top ** comp_para_bottom) >> \
cons_unsplit_wire(unsplit_func)
value = "hello world"
target = (unsplit_func(top_func(reverse_func(value, None), None),
bottom_func(reverse_func(value, None), None)),
[rev_msg_one, rev_msg_two, top_msg, bottom_msg])
result = ParallelPypelineHelperUnitTest.test(2, pipeline, "hello world", list())
self.assertEquals(target, result)
def test_parallel_run_eval_and_exec(self):
value = "hello world"
state = 0
input_msg = "input"
output_msg = "output"
input_func = lambda a, s: " ".join([input_msg, a])
output_func = lambda a, s: " ".join([a, output_msg])
function = lambda a, s: a.upper()
composition = lambda a, s: output_func(function(input_func(a, s), s), s)
state_func = lambda s: s + 1
pipeline = cons_function_component(function,
input_func,
output_func,
state_mutator = state_func)
result = ParallelPypelineHelperUnitTest.test(1, pipeline, value, state, run_pipeline)
target = (composition(value, state), state_func(state))
self.assertEquals(target, result)
result = ParallelPypelineHelperUnitTest.test(1, pipeline, value, state, eval_pipeline)
target = composition(value, state)
self.assertEquals(target, result)
result = ParallelPypelineHelperUnitTest.test(1, pipeline, value, state, exec_pipeline)
target = state_func(state)
self.assertEquals(target, result)
def test_parallel_wire(self):
value = {'PI' : 3.141, 'E' : 2.718}
pipeline = cons_wire(lambda a, s: {'pi' : a['PI'], 'e' : a['E']})
result = ParallelPypelineHelperUnitTest.test(1, pipeline, value, None, eval_pipeline)
self.assertEquals({'pi' : 3.141, 'e' : 2.718}, result)
def test_parallel_dictionary_wire(self):
value = {'pi' : 3.141, 'e' : 2.718}
pipeline = cons_dictionary_wire({'pi' : 'PI', 'e' : 'E'})
result = ParallelPypelineHelperUnitTest.test(1, pipeline, value, None, eval_pipeline)
self.assertEquals({'PI' : 3.141, 'E' : 2.718}, result)
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