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def test_operator_overloading():
from pybind11_tests import Vector2, Vector, ConstructorStats
v1 = Vector2(1, 2)
v2 = Vector(3, -1)
assert str(v1) == "[1.000000, 2.000000]"
assert str(v2) == "[3.000000, -1.000000]"
assert str(v1 + v2) == "[4.000000, 1.000000]"
assert str(v1 - v2) == "[-2.000000, 3.000000]"
assert str(v1 - 8) == "[-7.000000, -6.000000]"
assert str(v1 + 8) == "[9.000000, 10.000000]"
assert str(v1 * 8) == "[8.000000, 16.000000]"
assert str(v1 / 8) == "[0.125000, 0.250000]"
assert str(8 - v1) == "[7.000000, 6.000000]"
assert str(8 + v1) == "[9.000000, 10.000000]"
assert str(8 * v1) == "[8.000000, 16.000000]"
assert str(8 / v1) == "[8.000000, 4.000000]"
v1 += v2
v1 *= 2
assert str(v1) == "[8.000000, 2.000000]"
cstats = ConstructorStats.get(Vector2)
assert cstats.alive() == 2
del v1
assert cstats.alive() == 1
del v2
assert cstats.alive() == 0
assert cstats.values() == ['[1.000000, 2.000000]', '[3.000000, -1.000000]',
'[4.000000, 1.000000]', '[-2.000000, 3.000000]',
'[-7.000000, -6.000000]', '[9.000000, 10.000000]',
'[8.000000, 16.000000]', '[0.125000, 0.250000]',
'[7.000000, 6.000000]', '[9.000000, 10.000000]',
'[8.000000, 16.000000]', '[8.000000, 4.000000]']
assert cstats.default_constructions == 0
assert cstats.copy_constructions == 0
assert cstats.move_constructions >= 10
assert cstats.copy_assignments == 0
assert cstats.move_assignments == 0
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