def test_invert(n):
"""
Test the inversion of a Surreal.
"""
assert Surreal.from_value(n)._invert() == Surreal.from_value(1 / n)
def test_surreal_fail():
"""
Test that Surreal doesn't try to construct things like 1/3.
"""
with pytest.raises(ValueError):
Surreal.from_value(1 / 3)
def test_div(a, b):
"""
Test the division of two Surreals.
"""
assert Surreal.from_value(a) / Surreal.from_value(b) == Surreal.from_value(a / b)
def test_div_game(a, b):
"""
Test the division of a Surreal by a Game.
"""
assert Surreal.from_value(a) / Game(b) == Game(a / b)
def test_mul_game_2(a, b):
"""
Test the multiplication of two Surreals.
"""
assert Surreal.from_value(a) * Surreal.from_value(b) == Game(a * b)
def test_add_game_2(a, b):
"""
Test the addition of two Surreals.
"""
assert Surreal.from_value(a) + Surreal.from_value(b) == Game(a + b)
def test_order(a, b):
"""
Test the addition of two Surreals.
"""
assert (Surreal.from_value(a) >= Surreal.from_value(b)) == (a >= b)
"""
Tests for ludology.surreal.
"""
import pytest
from ludology import Game, Surreal
from ludology.closet import one, star, zero
@pytest.mark.parametrize('n', [
Surreal.from_value(0),
Surreal.from_value(1 / 2),
Surreal.from_value(0.125),
Surreal.from_value(-1),
Surreal.from_value(2),
])
def test_is_number(n):
"""
Test that all Surreals are numbers.
"""
assert n.is_number
@pytest.mark.parametrize(('n', 'v'), [
(Surreal.from_value(0), True),
(Surreal.from_value(1 / 2), False),
(Surreal.from_value(0.125), False),
(Surreal.from_value(-1), False),
(Surreal.from_value(2), False),
])
@pytest.mark.parametrize(('g', 't', 'v'), [
(pm_one, 1.0, Game({3}, {-3})),
(star, 1.0, pm_one),
(up, 1.0, Game({1}, {Game({0}, {-2})})),
])
def test_overheating(g, t, v):
"""
Test that several overheated Games are correct.
"""
assert overheat(g, t) == v
@pytest.mark.parametrize('g', [
3 * one,
Surreal.from_value(1 / 4),
zero,
-4 * one,
])
def test_is_cold(g):
"""
Assert that Numbers are cold.
"""
assert is_cold(g)
@pytest.mark.parametrize('g', [
star,
2 + star,
5 * one + up,
])