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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 pypeline.helpers.helpers import cons_subprocess_component, \
cons_function_component, \
cons_wire, \
cons_dictionary_wire, \
cons_split_wire, \
cons_unsplit_wire, \
cons_pipeline, \
cons_wired_components, \
cons_composed_component, \
cons_parallel_component, \
run_pipeline
class PypelineHelperFunctionUnitTest(unittest.TestCase):
@staticmethod
def __cons_and_start_subprocess_component(command,
arguments,
input_forming_func,
output_forming_func,
state_mutator = None):
args = [command]
args.extend(arguments)
pipe = subprocess.Popen(args,
stdin = subprocess.PIPE,
stdout = subprocess.PIPE)
try:
arrow = cons_subprocess_component(pipe,
input_forming_func,
output_forming_func,
state_mutator)
except Exception, ex:
pipe.terminate()
pipe.wait()
raise ex
return (arrow, pipe)
def test_pypeline_with_subprocess_and_function_components(self):
if sys.platform.startswith('win'):
self.fail("Currently only this unit test is only supported on non-Windows platforms")
rev_msg_one = "reverse(1)"
rev_msg_two = "reverse(2)"
upper_msg = "upper"
reverse_command = os.path.join("src", "pypeline", "helpers", "tests", "reverse.sh")
comp_proc_one = PypelineHelperFunctionUnitTest.__cons_and_start_subprocess_component(
reverse_command, tuple(),
lambda a, s: str(a['input']),
lambda a, s: {'output': str(a)},
state_mutator = lambda s: s.append(rev_msg_one) or s)
try:
comp_proc_two = PypelineHelperFunctionUnitTest.__cons_and_start_subprocess_component(
reverse_command, tuple(),
lambda a, s: str(a['input']),
lambda a, s: {'output': str(a)},
state_mutator = lambda s: s.append(rev_msg_two) or s)
try:
comp_one = comp_proc_one[0]
comp_two = comp_proc_two[0]
upper_func = lambda a_string, s: a_string.upper()
comp_three = cons_function_component(upper_func,
state_mutator = lambda s: s.append(upper_msg) or s)
input_wire_func = lambda a, s: {'input': a}
input_wire = cons_wire(input_wire_func)
wire = cons_dictionary_wire({'output': 'input'})
output_to_string_func = lambda a, s: str(a['output'])
to_upper_wire = cons_wire(output_to_string_func)
output_wire_func = lambda a, s: str(a['output'])
output_wire = cons_wire(output_wire_func)
pipeline = cons_pipeline(input_wire,
cons_wired_components(comp_one, comp_two, wire),
to_upper_wire)
pipeline = cons_composed_component(pipeline, comp_three)
value = "hello world"
target = (upper_func(value, None), [rev_msg_one, rev_msg_two, upper_msg])
result = run_pipeline(pipeline, "hello world", list())
self.assertEquals(target, result)
finally:
comp_proc_two[1].terminate()
comp_proc_two[1].wait()
finally:
comp_proc_one[1].terminate()
comp_proc_one[1].wait()
def test_pypeline_with_split_and_unsplit_wires(self):
if sys.platform.startswith('win'):
self.fail("Currently only this unit test is only supported on non-Windows platforms")
rev_msg_one = "reverse(subprocess)"
rev_msg_two = "reverse(function)"
reverse_command = os.path.join("src", "pypeline", "helpers", "tests", "reverse.sh")
reverse_func = lambda a, s: a[::-1]
input_func = lambda a, s: str(a['input'])
output_func = lambda a, s: {'output': str(a)}
comp_proc_one = PypelineHelperFunctionUnitTest.__cons_and_start_subprocess_component(
reverse_command, tuple(),
input_func,
output_func,
state_mutator = lambda s: s.append(rev_msg_one) or s)
try:
comp_one = comp_proc_one[0]
comp_two = cons_function_component(
reverse_func,
input_func,
output_func,
state_mutator = lambda s: s.append(rev_msg_two) or s)
parallel_reverse_comp = cons_parallel_component(comp_one, comp_two)
split_wire = cons_split_wire()
unsplit_func = lambda a, b: {'subprocess_output' : a['output'],
'function_output': b['output']}
unsplit_wire = cons_unsplit_wire(unsplit_func)
input_wire = cons_wire(lambda a, s: {'input': a})
pipeline = cons_pipeline(input_wire,
cons_composed_component(split_wire, parallel_reverse_comp),
unsplit_wire)
value = "hello world"
result = run_pipeline(pipeline, "hello world", list())
target_dict = {'output': reverse_func(value, None)}
target_value = unsplit_func(target_dict, target_dict)
target = (target_value, [rev_msg_one, rev_msg_two])
self.assertEquals(target, result)
finally:
comp_proc_one[1].terminate()
comp_proc_one[1].wait()
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