class StoppingTaskTestCase(TestCase):
r"""Test case for testing `Task`, `StoppingTask` and `CountingTask` classes.
Date:
April 2019
Author:
Klemen Berkovič
See Also:
* :class:`NiaPy.util.Task`
* :class:`NiaPy.util.CountingTask`
* :class:`NiaPy.util.StoppingTask`
"""
def setUp(self):
self.D, self.nFES, self.nGEN = 10, 10, 10
self.t = StoppingTask(D=self.D,
nFES=self.nFES,
nGEN=self.nGEN,
refValue=1,
benchmark=MyBenchmark())
def test_isFeasible_fine(self):
x = full(self.D, 10)
self.assertTrue(self.t.isFeasible(x))
x = full(self.D, -10)
self.assertTrue(self.t.isFeasible(x))
x = rnd.uniform(-10, 10, self.D)
self.assertTrue(self.t.isFeasible(x))
x = full(self.D, -20)
self.assertFalse(self.t.isFeasible(x))
x = full(self.D, 20)
self.assertFalse(self.t.isFeasible(x))
def test_nextIter_fine(self):
for i in range(self.nGEN):
self.assertFalse(self.t.stopCond())
self.t.nextIter()
self.assertTrue(self.t.stopCond())
def test_stopCondI(self):
for i in range(self.nGEN):
self.assertFalse(self.t.stopCondI(),
msg='Error at %s iteration!!!' % (i))
self.assertTrue(self.t.stopCondI())
def test_eval_fine(self):
x = full(self.D, 1.0)
for i in range(self.nFES):
self.assertAlmostEqual(self.t.eval(x),
self.D,
msg='Error at %s iteration!!!' % (i))
self.assertTrue(self.t.stopCond())
def test_eval_over_nFES_fine(self):
x = full(self.D, 1.0)
for i in range(self.nFES):
self.t.eval(x)
self.assertEqual(inf, self.t.eval(x))
self.assertTrue(self.t.stopCond())
def test_eval_over_nGEN_fine(self):
x = full(self.D, 1.0)
for i in range(self.nGEN):
self.t.nextIter()
self.assertEqual(inf, self.t.eval(x))
self.assertTrue(self.t.stopCond())
def test_nFES_count_fine(self):
x = full(self.D, 1.0)
for i in range(self.nFES):
self.t.eval(x)
self.assertEqual(self.t.Evals, i + 1,
'Error at %s. evaluation' % (i + 1))
def test_nGEN_count_fine(self):
x = full(self.D, 1.0)
for i in range(self.nGEN):
self.t.nextIter()
self.assertEqual(self.t.Iters, i + 1,
'Error at %s. iteration' % (i + 1))
def test_stopCond_evals_fine(self):
x = full(self.D, 1.0)
for i in range(self.nFES - 1):
self.t.eval(x)
self.assertFalse(self.t.stopCond())
self.t.eval(x)
self.assertTrue(self.t.stopCond())
def test_stopCond_iters_fine(self):
x = full(self.D, 1.0)
for i in range(self.nGEN - 1):
self.t.nextIter()
self.assertFalse(self.t.stopCond())
self.t.nextIter()
self.assertTrue(self.t.stopCond())
def test_stopCond_refValue_fine(self):
x = full(self.D, 1.0)
for i in range(self.nGEN - 5):
self.assertFalse(self.t.stopCond())
self.assertEqual(self.D, self.t.eval(x))
self.t.nextIter()
x = full(self.D, 0.0)
self.assertEqual(0, self.t.eval(x))
self.assertTrue(self.t.stopCond())
self.assertEqual(self.nGEN - 5, self.t.Iters)
def test_print_conv_one_fine(self):
r1, r2 = [], []
for i in range(self.nFES):
x = full(self.D, 10 - i)
r1.append(i + 1), r2.append(self.t.eval(x))
t_r1, t_r2 = self.t.return_conv()
self.assertTrue(array_equal(r1, t_r1))
self.assertTrue(array_equal(r2, t_r2))
def test_print_conv_two_fine(self):
r1, r2 = [], []
for i in range(self.nFES):
x = full(self.D, 10 - i if i not in (3, 4, 5) else 4)
r1.append(i + 1), r2.append(self.t.eval(x))
t_r1, t_r2 = self.t.return_conv()
self.assertTrue(array_equal(r2, t_r2))
self.assertTrue(array_equal(r1, t_r1))
# encoding=utf8
# This is temporary fix to import module from parent folder
# It will be removed when package is published on PyPI
import sys
sys.path.append('../')
# End of fix
from NiaPy.task import StoppingTask, OptimizationType
from NiaPy.benchmarks import Sphere
from NiaPy.algorithms.basic import DifferentialEvolution
# Storing improvements during the evolutionary cycle
for i in range(1):
task = StoppingTask(D=10, nFES=10000, benchmark=Sphere())
algo = DifferentialEvolution(NP=40, CR=0.9, F=0.5)
best = algo.run(task)
evals, x_f = task.return_conv()
print(evals) # print function evaluations
print(x_f) # print values
