operator_div.py

from testutils import assert_raises

assert_raises(ZeroDivisionError, lambda: 5 / 0)
assert_raises(ZeroDivisionError, lambda: 5 / -0.0)
assert_raises(ZeroDivisionError, lambda: 5 / (2 - 2))
assert_raises(ZeroDivisionError, lambda: 5 % 0)
assert_raises(ZeroDivisionError, lambda: 5 // 0)
assert_raises(ZeroDivisionError, lambda: 5.3 // (-0.0))
assert_raises(ZeroDivisionError, divmod, 5, 0)

assert issubclass(ZeroDivisionError, ArithmeticError)

# 2.456984346552728
res = 10**500 / (4 * 10**499 + 7 * 10**497 + 3 * 10**494)
assert 2.456984 <= res <= 2.456985

# 95.23809523809524
res = 10**3000 / (10**2998 + 5 * 10**2996)
assert 95.238095 <= res <= 95.238096

assert 10**500 / (2 * 10 ** (500 - 308)) == 5e307
assert 10**500 / (10 ** (500 - 308)) == 1e308
assert_raises(
    OverflowError, lambda: 10**500 / (10 ** (500 - 309)), _msg="too big result"
)

# a bit more than f64::MAX = 1.7976931348623157e+308_f64
assert (2 * 10**308) / 2 == 1e308

# when dividing too big int by a float, the operation should fail
assert_raises(
    OverflowError, lambda: (2 * 10**308) / 2.0, _msg="division of big int by float"
)