5bf70b691f
* CMake has not been updated yet * bazel was compiling at least last week bazel: disable math opt facility_location.py missing some dependencies...
96 lines
3.6 KiB
Python
96 lines
3.6 KiB
Python
#!/usr/bin/env python3
|
|
# Copyright 2010-2025 Google LLC
|
|
# 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 math
|
|
|
|
from absl.testing import absltest
|
|
from ortools.math_opt.python import model
|
|
|
|
|
|
class QuadraticConstraintsTest(absltest.TestCase):
|
|
|
|
def test_empty_constraint(self) -> None:
|
|
mod = model.Model()
|
|
x = mod.add_variable()
|
|
quad_con = mod.add_quadratic_constraint()
|
|
self.assertEqual(quad_con.lower_bound, -math.inf)
|
|
self.assertEqual(quad_con.upper_bound, math.inf)
|
|
self.assertEqual(quad_con.id, 0)
|
|
self.assertEqual(quad_con.name, "")
|
|
self.assertEqual(quad_con.get_linear_coefficient(x), 0.0)
|
|
self.assertEqual(quad_con.get_quadratic_coefficient(x, x), 0.0)
|
|
self.assertEmpty(list(quad_con.linear_terms()))
|
|
self.assertEmpty(list(quad_con.quadratic_terms()))
|
|
|
|
def test_full_constraint(self) -> None:
|
|
mod = model.Model()
|
|
x = mod.add_variable()
|
|
y = mod.add_variable()
|
|
quad_con = mod.add_quadratic_constraint(
|
|
lb=3.0, ub=4.0, expr=5 * x + 6 * y + 7 * x * y + 8 * y * y, name="c"
|
|
)
|
|
self.assertEqual(quad_con.lower_bound, 3.0)
|
|
self.assertEqual(quad_con.upper_bound, 4.0)
|
|
self.assertEqual(quad_con.id, 0)
|
|
self.assertEqual(quad_con.name, "c")
|
|
self.assertEqual(quad_con.get_linear_coefficient(x), 5.0)
|
|
self.assertEqual(quad_con.get_linear_coefficient(y), 6.0)
|
|
self.assertEqual(quad_con.get_quadratic_coefficient(x, y), 7.0)
|
|
self.assertEqual(quad_con.get_quadratic_coefficient(y, y), 8.0)
|
|
self.assertDictEqual(
|
|
{term.variable: term.coefficient for term in quad_con.linear_terms()},
|
|
{x: 5.0, y: 6.0},
|
|
)
|
|
self.assertDictEqual(
|
|
{
|
|
(term.key.first_var, term.key.second_var): term.coefficient
|
|
for term in quad_con.quadratic_terms()
|
|
},
|
|
{(x, y): 7.0, (y, y): 8.0},
|
|
)
|
|
|
|
def test_eq(self) -> None:
|
|
mod1 = model.Model()
|
|
mod2 = model.Model()
|
|
q1 = mod1.add_quadratic_constraint()
|
|
q2 = mod1.add_quadratic_constraint()
|
|
q3 = mod2.add_quadratic_constraint()
|
|
q1_other = mod1.get_quadratic_constraint(0)
|
|
self.assertEqual(q1, q1_other)
|
|
self.assertNotEqual(q1, q2)
|
|
self.assertNotEqual(q1, q3)
|
|
self.assertNotEqual(q1, "cat")
|
|
|
|
def test_str(self) -> None:
|
|
mod = model.Model()
|
|
quad_con = mod.add_quadratic_constraint(name="qqq")
|
|
self.assertEqual(str(quad_con), "qqq")
|
|
self.assertEqual(repr(quad_con), "<QuadraticConstraint id: 0, name: 'qqq'>")
|
|
|
|
def test_get_coefficient_variable_wrong_model(self) -> None:
|
|
mod1 = model.Model()
|
|
mod2 = model.Model()
|
|
q1 = mod1.add_quadratic_constraint()
|
|
# Ensure the bad model, not the bad id, causes the error.
|
|
mod1.add_variable()
|
|
x2 = mod2.add_variable()
|
|
with self.assertRaises(ValueError):
|
|
q1.get_linear_coefficient(x2)
|
|
with self.assertRaises(ValueError):
|
|
q1.get_quadratic_coefficient(x2, x2)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
absltest.main()
|