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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Tests for `pyswarms` package."""
# Import standard library
from collections import namedtuple
# Import modules
import numpy as np
import pytest
# Import from pyswarms
from pyswarms.utils.functions import single_obj as fx
Bounds = namedtuple("Bounds", "low high")
b = {
# Define all bounds here
"ackley": Bounds(low=-32, high=32),
"beale": Bounds(low=-4.5, high=4.5),
"booth": Bounds(low=-10, high=10),
# bukin_6 is not symmetrical
"crossintray": Bounds(low=-1, high=10),
"easom": Bounds(low=-100, high=100),
"eggholder": Bounds(low=-512, high=512),
"goldstein": Bounds(low=-2, high=-2),
"himmelblau": Bounds(low=-5, high=5),
"holdertable": Bounds(low=-10, high=10),
"levi": Bounds(low=-10, high=10),
"matyas": Bounds(low=-10, high=10),
"rastrigin": Bounds(low=-5.12, high=5.12),
# rosenbrock has an infinite domain
"schaffer2": Bounds(low=-100, high=100),
"threehump": Bounds(low=-5, high=5),
}
def test_ackley_bound_fail(outbound):
"""Test ackley bound exception"""
with pytest.raises(ValueError):
x = outbound(b["ackley"].low, b["ackley"].high, size=(3, 2))
fx.ackley(x)
def test_beale_bound_fail(outbound):
"""Test beale bound exception"""
with pytest.raises(ValueError):
x = outbound(b["beale"].low, b["beale"].high, size=(3, 2))
fx.beale(x)
def test_booth_bound_fail(outbound):
"""Test booth bound exception"""
with pytest.raises(ValueError):
x = outbound(b["booth"].low, b["booth"].high, size=(3, 2))
fx.booth(x)
@pytest.mark.parametrize(
"x",
[
-np.random.uniform(15.001, 100, (3, 2)),
np.random.uniform(-5.001, -3.001, (3, 2)),
np.random.uniform(-3.001, -100, (3, 2)),
],
)
def test_bukin6_bound_fail(x):
"""Test bukin6 bound exception"""
with pytest.raises(ValueError):
fx.bukin6(x)
def test_crossintray_bound_fail(outbound):
"""Test crossintray bound exception"""
with pytest.raises(ValueError):
x = outbound(b["crossintray"].low, b["crossintray"].high, size=(3, 2))
fx.crossintray(x)
def test_easom_bound_fail(outbound):
"""Test easom bound exception"""
with pytest.raises(ValueError):
x = outbound(b["easom"].low, b["easom"].high, size=(3, 2))
fx.easom(x)
def test_eggholder_bound_fail(outbound):
"""Test eggholder bound exception"""
with pytest.raises(ValueError):
x = outbound(b["eggholder"].low, b["eggholder"].high, size=(3, 2))
fx.eggholder(x)
def test_goldstein_bound_fail(outbound):
"""Test goldstein bound exception"""
with pytest.raises(ValueError):
x = outbound(b["goldstein"].low, b["goldstein"].high, size=(3, 2))
fx.goldstein(x)
def test_himmelblau_bound_fail(outbound):
"""Test himmelblau bound exception"""
with pytest.raises(ValueError):
x = outbound(b["himmelblau"].low, b["himmelblau"].high, size=(3, 2))
fx.himmelblau(x)
def test_holdertable_bound_fail(outbound):
"""Test holdertable bound exception"""
with pytest.raises(ValueError):
x = outbound(b["holdertable"].low, b["holdertable"].high, size=(3, 2))
fx.holdertable(x)
def test_levi_bound_fail(outbound):
"""Test levi bound exception"""
with pytest.raises(ValueError):
x = outbound(b["levi"].low, b["levi"].high, size=(3, 2))
fx.levi(x)
def test_matyas_bound_fail(outbound):
"""Test matyas bound exception"""
with pytest.raises(ValueError):
x = outbound(b["matyas"].low, b["matyas"].high, size=(3, 2))
fx.matyas(x)
def test_rastrigin_bound_fail(outbound):
"""Test rastrigin bound exception"""
with pytest.raises(ValueError):
x = outbound(b["rastrigin"].low, b["rastrigin"].high, size=(3, 2))
fx.rastrigin(x)
def test_schaffer2_bound_fail(outbound):
"""Test schaffer2 bound exception"""
with pytest.raises(ValueError):
x = outbound(
b["schaffer2"].low, b["schaffer2"].high, tol=200, size=(3, 2)
)
fx.schaffer2(x)
def test_threehump_bound_fail(outbound):
"""Test threehump bound exception"""
with pytest.raises(ValueError):
x = outbound(b["threehump"].low, b["threehump"].high, size=(3, 2))
fx.threehump(x)
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