146 lines
4.0 KiB
Python
146 lines
4.0 KiB
Python
# -*- coding: utf-8 -*-
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import pytest
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from pybind11_tests import operators as m
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from pybind11_tests import ConstructorStats
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def test_operator_overloading():
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v1 = m.Vector2(1, 2)
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v2 = m.Vector(3, -1)
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v3 = m.Vector2(1, 2) # Same value as v1, but different instance.
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assert v1 is not v3
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assert str(v1) == "[1.000000, 2.000000]"
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assert str(v2) == "[3.000000, -1.000000]"
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assert str(-v2) == "[-3.000000, 1.000000]"
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assert str(v1 + v2) == "[4.000000, 1.000000]"
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assert str(v1 - v2) == "[-2.000000, 3.000000]"
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assert str(v1 - 8) == "[-7.000000, -6.000000]"
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assert str(v1 + 8) == "[9.000000, 10.000000]"
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assert str(v1 * 8) == "[8.000000, 16.000000]"
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assert str(v1 / 8) == "[0.125000, 0.250000]"
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assert str(8 - v1) == "[7.000000, 6.000000]"
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assert str(8 + v1) == "[9.000000, 10.000000]"
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assert str(8 * v1) == "[8.000000, 16.000000]"
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assert str(8 / v1) == "[8.000000, 4.000000]"
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assert str(v1 * v2) == "[3.000000, -2.000000]"
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assert str(v2 / v1) == "[3.000000, -0.500000]"
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assert v1 == v3
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assert v1 != v2
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assert hash(v1) == 4
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# TODO(eric.cousineau): Make this work.
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# assert abs(v1) == "abs(Vector2)"
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v1 += 2 * v2
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assert str(v1) == "[7.000000, 0.000000]"
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v1 -= v2
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assert str(v1) == "[4.000000, 1.000000]"
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v1 *= 2
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assert str(v1) == "[8.000000, 2.000000]"
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v1 /= 16
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assert str(v1) == "[0.500000, 0.125000]"
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v1 *= v2
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assert str(v1) == "[1.500000, -0.125000]"
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v2 /= v1
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assert str(v2) == "[2.000000, 8.000000]"
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cstats = ConstructorStats.get(m.Vector2)
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assert cstats.alive() == 3
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del v1
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assert cstats.alive() == 2
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del v2
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assert cstats.alive() == 1
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del v3
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assert cstats.alive() == 0
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assert cstats.values() == [
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"[1.000000, 2.000000]",
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"[3.000000, -1.000000]",
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"[1.000000, 2.000000]",
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"[-3.000000, 1.000000]",
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"[4.000000, 1.000000]",
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"[-2.000000, 3.000000]",
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"[-7.000000, -6.000000]",
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"[9.000000, 10.000000]",
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"[8.000000, 16.000000]",
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"[0.125000, 0.250000]",
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"[7.000000, 6.000000]",
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"[9.000000, 10.000000]",
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"[8.000000, 16.000000]",
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"[8.000000, 4.000000]",
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"[3.000000, -2.000000]",
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"[3.000000, -0.500000]",
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"[6.000000, -2.000000]",
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]
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assert cstats.default_constructions == 0
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assert cstats.copy_constructions == 0
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assert cstats.move_constructions >= 10
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assert cstats.copy_assignments == 0
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assert cstats.move_assignments == 0
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def test_operators_notimplemented():
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"""#393: need to return NotSupported to ensure correct arithmetic operator behavior"""
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c1, c2 = m.C1(), m.C2()
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assert c1 + c1 == 11
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assert c2 + c2 == 22
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assert c2 + c1 == 21
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assert c1 + c2 == 12
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def test_nested():
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"""#328: first member in a class can't be used in operators"""
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a = m.NestA()
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b = m.NestB()
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c = m.NestC()
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a += 10
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assert m.get_NestA(a) == 13
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b.a += 100
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assert m.get_NestA(b.a) == 103
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c.b.a += 1000
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assert m.get_NestA(c.b.a) == 1003
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b -= 1
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assert m.get_NestB(b) == 3
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c.b -= 3
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assert m.get_NestB(c.b) == 1
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c *= 7
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assert m.get_NestC(c) == 35
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abase = a.as_base()
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assert abase.value == -2
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a.as_base().value += 44
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assert abase.value == 42
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assert c.b.a.as_base().value == -2
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c.b.a.as_base().value += 44
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assert c.b.a.as_base().value == 42
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del c
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pytest.gc_collect()
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del a # Shouldn't delete while abase is still alive
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pytest.gc_collect()
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assert abase.value == 42
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del abase, b
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pytest.gc_collect()
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def test_overriding_eq_reset_hash():
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assert m.Comparable(15) is not m.Comparable(15)
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assert m.Comparable(15) == m.Comparable(15)
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with pytest.raises(TypeError):
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hash(m.Comparable(15)) # TypeError: unhashable type: 'm.Comparable'
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for hashable in (m.Hashable, m.Hashable2):
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assert hashable(15) is not hashable(15)
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assert hashable(15) == hashable(15)
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assert hash(hashable(15)) == 15
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assert hash(hashable(15)) == hash(hashable(15))
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