285 lines
7.0 KiB
Python
285 lines
7.0 KiB
Python
# Copyright 2010-2017 Google
|
|
# 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.
|
|
"""Unit tests for python/constraint_solver.swig. Not exhaustive."""
|
|
|
|
import sys
|
|
|
|
from ortools.constraint_solver import model_pb2
|
|
from ortools.constraint_solver import pywrapcp
|
|
|
|
|
|
def test_member():
|
|
print 'test_member'
|
|
solver = pywrapcp.Solver('test member')
|
|
x = solver.IntVar(1, 10, 'x')
|
|
ct = x.Member([1, 2, 3, 5])
|
|
print ct
|
|
|
|
|
|
def test_sparse_var():
|
|
print 'test_sparse_var'
|
|
solver = pywrapcp.Solver('test_sparse_var')
|
|
x = solver.IntVar([1, 3, 5], 'x')
|
|
print x
|
|
|
|
|
|
def test_modulo():
|
|
print 'test_modulo'
|
|
solver = pywrapcp.Solver('test_modulo')
|
|
x = solver.IntVar(0, 10, 'x')
|
|
y = solver.IntVar(2, 4, 'y')
|
|
print x % 3
|
|
print x % y
|
|
|
|
|
|
def test_limit():
|
|
solver = pywrapcp.Solver('test_limit')
|
|
# TODO(user): expose the proto-based MakeLimit() API in or-tools and test it
|
|
# here.
|
|
time = 10000 # ms
|
|
branches = 10
|
|
failures = sys.maxint
|
|
solutions = sys.maxint
|
|
smart_time_check = True
|
|
cumulative = False
|
|
limit = solver.Limit(time, branches, failures, solutions, smart_time_check,
|
|
cumulative)
|
|
print limit
|
|
|
|
|
|
def test_export():
|
|
print 'test_export'
|
|
solver = pywrapcp.Solver('test_export')
|
|
x = solver.IntVar(1, 10, 'x')
|
|
ct = x.Member([1, 2, 3, 5])
|
|
solver.Add(ct)
|
|
proto = model_pb2.CPModelProto()
|
|
proto.model = 'wrong name'
|
|
solver.ExportModel(proto)
|
|
print repr(proto)
|
|
print str(proto)
|
|
|
|
|
|
class SearchMonitorTest(pywrapcp.SearchMonitor):
|
|
|
|
def __init__(self, solver, nexts):
|
|
pywrapcp.SearchMonitor.__init__(self, solver)
|
|
self._nexts = nexts
|
|
|
|
def BeginInitialPropagation(self):
|
|
print self._nexts
|
|
|
|
def EndInitialPropagation(self):
|
|
print self._nexts
|
|
|
|
|
|
def test_search_monitor():
|
|
print 'test_search_monitor'
|
|
solver = pywrapcp.Solver('test search_monitor')
|
|
x = solver.IntVar(1, 10, 'x')
|
|
ct = (x == 3)
|
|
solver.Add(ct)
|
|
db = solver.Phase([x], solver.CHOOSE_FIRST_UNBOUND, solver.ASSIGN_MIN_VALUE)
|
|
monitor = SearchMonitorTest(solver, x)
|
|
solver.Solve(db, monitor)
|
|
|
|
|
|
class DemonTest(pywrapcp.PyDemon):
|
|
|
|
def __init__(self, x):
|
|
pywrapcp.PyDemon.__init__(self)
|
|
self._x = x
|
|
print 'Demon built'
|
|
|
|
def Run(self, solver):
|
|
print 'in Run(), saw ' + str(self._x)
|
|
|
|
|
|
def test_demon():
|
|
print 'test_demon'
|
|
solver = pywrapcp.Solver('test_demon')
|
|
x = solver.IntVar(1, 10, 'x')
|
|
demon = DemonTest(x)
|
|
demon.Run(solver)
|
|
|
|
|
|
class ConstraintTest(pywrapcp.PyConstraint):
|
|
|
|
def __init__(self, solver, x):
|
|
pywrapcp.Constraint.__init__(self, solver)
|
|
self._x = x
|
|
print 'Constraint built'
|
|
|
|
def Post(self):
|
|
print 'in Post()'
|
|
self._demon = DemonTest(self._x)
|
|
self._x.WhenBound(self._demon)
|
|
print 'out of Post()'
|
|
|
|
def InitialPropagate(self):
|
|
print 'in InitialPropagate()'
|
|
self._x.SetMin(5)
|
|
print self._x
|
|
print 'out of InitialPropagate()'
|
|
|
|
|
|
def test_constraint():
|
|
print 'test_constraint'
|
|
solver = pywrapcp.Solver('test_constraint')
|
|
x = solver.IntVar(1, 10, 'x')
|
|
myct = ConstraintTest(solver, x)
|
|
solver.Add(myct)
|
|
db = solver.Phase([x], solver.CHOOSE_FIRST_UNBOUND, solver.ASSIGN_MIN_VALUE)
|
|
solver.Solve(db)
|
|
|
|
|
|
class InitialPropagateDemon(pywrapcp.PyDemon):
|
|
|
|
def __init__(self, ct):
|
|
pywrapcp.Demon.__init__(self)
|
|
self._ct = ct
|
|
|
|
def Run(self, solver):
|
|
self._ct.InitialPropagate()
|
|
|
|
|
|
class DumbGreaterOrEqualToFive(pywrapcp.PyConstraint):
|
|
|
|
def __init__(self, solver, x):
|
|
pywrapcp.Constraint.__init__(self, solver)
|
|
self._x = x
|
|
|
|
def Post(self):
|
|
self._demon = InitialPropagateDemon(self)
|
|
self._x.WhenBound(self._demon)
|
|
|
|
def InitialPropagate(self):
|
|
if self._x.Bound():
|
|
if self._x.Value() < 5:
|
|
print 'Reject %d' % self._x.Value()
|
|
self.solver().Fail()
|
|
else:
|
|
print 'Accept %d' % self._x.Value()
|
|
|
|
|
|
def test_failing_constraint():
|
|
print 'test_failing_constraint'
|
|
solver = pywrapcp.Solver('test failing constraint')
|
|
x = solver.IntVar(1, 10, 'x')
|
|
myct = DumbGreaterOrEqualToFive(solver, x)
|
|
solver.Add(myct)
|
|
db = solver.Phase([x], solver.CHOOSE_FIRST_UNBOUND, solver.ASSIGN_MIN_VALUE)
|
|
solver.Solve(db)
|
|
|
|
|
|
def test_domain_iterator():
|
|
print 'test_domain_iterator'
|
|
solver = pywrapcp.Solver('test_domain_iterator')
|
|
x = solver.IntVar([1, 2, 4, 6], 'x')
|
|
for i in x.DomainIterator():
|
|
print i
|
|
|
|
|
|
class WatchDomain(pywrapcp.PyDemon):
|
|
|
|
def __init__(self, x):
|
|
pywrapcp.Demon.__init__(self)
|
|
self._x = x
|
|
|
|
def Run(self, solver):
|
|
for i in self._x.HoleIterator():
|
|
print 'Removed %d' % i
|
|
|
|
|
|
class HoleConstraintTest(pywrapcp.PyConstraint):
|
|
|
|
def __init__(self, solver, x):
|
|
pywrapcp.Constraint.__init__(self, solver)
|
|
self._x = x
|
|
|
|
def Post(self):
|
|
self._demon = WatchDomain(self._x)
|
|
self._x.WhenDomain(self._demon)
|
|
|
|
def InitialPropagate(self):
|
|
self._x.RemoveValue(5)
|
|
|
|
|
|
def test_hole_iterator():
|
|
print 'test_hole_iterator'
|
|
solver = pywrapcp.Solver('test_hole_iterator')
|
|
x = solver.IntVar(1, 10, 'x')
|
|
myct = HoleConstraintTest(solver, x)
|
|
solver.Add(myct)
|
|
db = solver.Phase([x], solver.CHOOSE_FIRST_UNBOUND, solver.ASSIGN_MIN_VALUE)
|
|
solver.Solve(db)
|
|
|
|
|
|
class BinarySum(pywrapcp.PyConstraint):
|
|
|
|
def __init__(self, solver, x, y, z):
|
|
pywrapcp.Constraint.__init__(self, solver)
|
|
self._x = x
|
|
self._y = y
|
|
self._z = z
|
|
|
|
def Post(self):
|
|
self._demon = InitialPropagateDemon(self)
|
|
self._x.WhenRange(self._demon)
|
|
self._y.WhenRange(self._demon)
|
|
self._z.WhenRange(self._demon)
|
|
|
|
def InitialPropagate(self):
|
|
self._z.SetRange(self._x.Min() + self._y.Min(),
|
|
self._x.Max() + self._y.Max())
|
|
self._x.SetRange(self._z.Min() - self._y.Max(),
|
|
self._z.Max() - self._y.Min())
|
|
self._y.SetRange(self._z.Min() - self._x.Max(),
|
|
self._z.Max() - self._x.Min())
|
|
|
|
|
|
def test_sum_constraint():
|
|
print 'test_sum_constraint'
|
|
solver = pywrapcp.Solver('test_sum_constraint')
|
|
x = solver.IntVar(1, 5, 'x')
|
|
y = solver.IntVar(1, 5, 'y')
|
|
z = solver.IntVar(1, 5, 'z')
|
|
binary_sum = BinarySum(solver, x, y, z)
|
|
solver.Add(binary_sum)
|
|
db = solver.Phase([x, y, z], solver.CHOOSE_FIRST_UNBOUND,
|
|
solver.ASSIGN_MIN_VALUE)
|
|
solver.NewSearch(db)
|
|
while solver.NextSolution():
|
|
print '%d + %d == %d' % (x.Value(), y.Value(), z.Value())
|
|
solver.EndSearch()
|
|
|
|
|
|
def main():
|
|
test_member()
|
|
test_sparse_var()
|
|
test_modulo()
|
|
test_limit()
|
|
# TODO(user): expose ExportModel() in python and re-enable this test.
|
|
# test_export()
|
|
test_search_monitor()
|
|
test_demon()
|
|
test_failing_constraint()
|
|
test_constraint()
|
|
test_domain_iterator()
|
|
test_hole_iterator()
|
|
test_sum_constraint()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|