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[case testI32BasicOps]
from typing import Any, Tuple
from mypy_extensions import i16, i32, i64
from testutil import assertRaises
def test_box_and_unbox() -> None:
values = (list(range(-2**31, -2**31 + 100)) +
list(range(-1000, 1000)) +
list(range(2**31 - 100, 2**31)))
for i in values:
o: Any = i
x: i32 = o
o2: Any = x
assert o == o2
assert x == i
with assertRaises(OverflowError, "int too large to convert to i32"):
o = 2**31
x2: i32 = o
with assertRaises(OverflowError, "int too large to convert to i32"):
o = -2**32 - 1
x3: i32 = o
def div_by_7(x: i32) -> i32:
return x // 7
def div_by_neg_7(x: i32) -> i32:
return x // -7
def div(x: i32, y: i32) -> i32:
return x // y
def test_divide_by_constant() -> None:
for i in range(-1000, 1000):
assert div_by_7(i) == i // 7
for i in range(-2**31, -2**31 + 1000):
assert div_by_7(i) == i // 7
for i in range(2**31 - 1000, 2**31):
assert div_by_7(i) == i // 7
def test_divide_by_negative_constant() -> None:
for i in range(-1000, 1000):
assert div_by_neg_7(i) == i // -7
for i in range(-2**31, -2**31 + 1000):
assert div_by_neg_7(i) == i // -7
for i in range(2**31 - 1000, 2**31):
assert div_by_neg_7(i) == i // -7
def test_divide_by_variable() -> None:
values = (list(range(-50, 50)) +
list(range(-2**31, -2**31 + 10)) +
list(range(2**31 - 10, 2**31)))
for x in values:
for y in values:
if y != 0:
if x // y == 2**31:
with assertRaises(OverflowError, "integer division overflow"):
div(x, y)
else:
assert div(x, y) == x // y
else:
with assertRaises(ZeroDivisionError, "integer division or modulo by zero"):
div(x, y)
def mod_by_7(x: i32) -> i32:
return x % 7
def mod_by_neg_7(x: i32) -> i32:
return x // -7
def mod(x: i32, y: i32) -> i32:
return x % y
def test_mod_by_constant() -> None:
for i in range(-1000, 1000):
assert mod_by_7(i) == i % 7
for i in range(-2**31, -2**31 + 1000):
assert mod_by_7(i) == i % 7
for i in range(2**31 - 1000, 2**31):
assert mod_by_7(i) == i % 7
def test_mod_by_negative_constant() -> None:
for i in range(-1000, 1000):
assert mod_by_neg_7(i) == i // -7
for i in range(-2**31, -2**31 + 1000):
assert mod_by_neg_7(i) == i // -7
for i in range(2**31 - 1000, 2**31):
assert mod_by_neg_7(i) == i // -7
def test_mod_by_variable() -> None:
values = (list(range(-50, 50)) +
list(range(-2**31, -2**31 + 10)) +
list(range(2**31 - 10, 2**31)))
for x in values:
for y in values:
if y != 0:
assert mod(x, y) == x % y
else:
with assertRaises(ZeroDivisionError, "integer division or modulo by zero"):
mod(x, y)
def test_simple_arithmetic_ops() -> None:
zero: i32 = int()
one: i32 = zero + 1
two: i32 = one + 1
neg_one: i32 = -one
assert one + one == 2
assert one + two == 3
assert one + neg_one == 0
assert one - one == 0
assert one - two == -1
assert one * one == 1
assert one * two == 2
assert two * two == 4
assert two * neg_one == -2
assert neg_one * one == -1
assert neg_one * neg_one == 1
assert two * 0 == 0
assert 0 * two == 0
assert -one == -1
assert -two == -2
assert -neg_one == 1
assert -zero == 0
def test_bitwise_ops() -> None:
x: i32 = 1920687484 + int()
y: i32 = 383354614 + int()
z: i32 = -1879040563 + int()
zero: i32 = int()
one: i32 = zero + 1
two: i32 = zero + 2
neg_one: i32 = -one
assert x & y == 307823732
assert x & z == 268442956
assert z & z == z
assert x & zero == 0
assert x | y == 1996218366
assert x | z == -226796035
assert z | z == z
assert x | 0 == x
assert x ^ y == 1688394634
assert x ^ z == -495238991
assert z ^ z == 0
assert z ^ 0 == z
assert x << one == -453592328
assert x << two == -907184656
assert z << two == 1073772340
assert z << 0 == z
assert x >> one == 960343742
assert x >> two == 480171871
assert z >> two == -469760141
assert z >> 0 == z
assert ~x == -1920687485
assert ~z == 1879040562
assert ~zero == -1
assert ~neg_one == 0
def eq(x: i32, y: i32) -> bool:
return x == y
def test_eq() -> None:
assert eq(int(), int())
assert eq(5 + int(), 5 + int())
assert eq(-5 + int(), -5 + int())
assert not eq(int(), 1 + int())
assert not eq(5 + int(), 6 + int())
assert not eq(-5 + int(), -6 + int())
assert not eq(-5 + int(), 5 + int())
def test_comparisons() -> None:
one: i32 = 1 + int()
one2: i32 = 1 + int()
two: i32 = 2 + int()
assert one < two
assert not (one < one2)
assert not (two < one)
assert two > one
assert not (one > one2)
assert not (one > two)
assert one <= two
assert one <= one2
assert not (two <= one)
assert two >= one
assert one >= one2
assert not (one >= two)
assert one == one2
assert not (one == two)
assert one != two
assert not (one != one2)
def test_mixed_comparisons() -> None:
i32_3: i32 = int() + 3
int_5 = int() + 5
assert i32_3 < int_5
assert int_5 > i32_3
b = i32_3 > int_5
assert not b
int_largest = int() + (1 << 31) - 1
assert int_largest > i32_3
int_smallest = int() - (1 << 31)
assert i32_3 > int_smallest
int_too_big = int() + (1 << 31)
int_too_small = int() - (1 << 31) - 1
with assertRaises(OverflowError):
assert i32_3 < int_too_big
with assertRaises(OverflowError):
assert int_too_big < i32_3
with assertRaises(OverflowError):
assert i32_3 > int_too_small
with assertRaises(OverflowError):
assert int_too_small < i32_3
def test_mixed_arithmetic_and_bitwise_ops() -> None:
i32_3: i32 = int() + 3
int_5 = int() + 5
assert i32_3 + int_5 == 8
assert int_5 - i32_3 == 2
assert i32_3 << int_5 == 96
assert int_5 << i32_3 == 40
assert i32_3 ^ int_5 == 6
assert int_5 | i32_3 == 7
int_largest = int() + (1 << 31) - 1
assert int_largest - i32_3 == 2147483644
int_smallest = int() - (1 << 31)
assert int_smallest + i32_3 == -2147483645
int_too_big = int() + (1 << 31)
int_too_small = int() - (1 << 31) - 1
with assertRaises(OverflowError):
assert i32_3 & int_too_big
with assertRaises(OverflowError):
assert int_too_small & i32_3
def test_coerce_to_and_from_int() -> None:
for shift in range(0, 32):
for sign in 1, -1:
for delta in range(-5, 5):
n = sign * (1 << shift) + delta
if -(1 << 31) <= n < (1 << 31):
x: i32 = n
m: int = x
assert m == n
def test_explicit_conversion_to_i32() -> None:
x = i32(5)
assert x == 5
y = int() - 113
x = i32(y)
assert x == -113
n64: i64 = 1733
x = i32(n64)
assert x == 1733
n32: i32 = -1733
x = i32(n32)
assert x == -1733
z = i32(x)
assert z == -1733
a: i16 = int() + 19764
assert i32(a) == 19764
a = int() - 1
assert i32(a) == -1
def test_explicit_conversion_overflow() -> None:
max_i32 = int() + 2**31 - 1
x = i32(max_i32)
assert x == 2**31 - 1
assert int(x) == max_i32
min_i32 = int() - 2**31
y = i32(min_i32)
assert y == -2**31
assert int(y) == min_i32
too_big = int() + 2**31
with assertRaises(OverflowError):
x = i32(too_big)
too_small = int() - 2**31 - 1
with assertRaises(OverflowError):
x = i32(too_small)
def test_i32_from_large_small_literal() -> None:
x = i32(2**31 - 1)
assert x == 2**31 - 1
x = i32(-2**31)
assert x == -2**31
def test_i32_truncate_from_i64() -> None:
large = i64(2**32 + 157 + int())
x = i32(large)
assert x == 157
small = i64(-2**32 - 157 + int())
x = i32(small)
assert x == -157
large2 = i64(2**31 + int())
x = i32(large2)
assert x == -2**31
small2 = i64(-2**31 - 1 - int())
x = i32(small2)
assert x == 2**31 - 1
def from_float(x: float) -> i32:
return i32(x)
def test_explicit_conversion_from_float() -> None:
assert from_float(0.0) == 0
assert from_float(1.456) == 1
assert from_float(-1234.567) == -1234
assert from_float(2**31 - 1) == 2**31 - 1
assert from_float(-2**31) == -2**31
# The error message could be better, but this is acceptable
with assertRaises(OverflowError, "int too large to convert to i32"):
assert from_float(float(2**31))
with assertRaises(OverflowError, "int too large to convert to i32"):
# One ulp below the lowest valid i64 value
from_float(float(-2**31 - 2048))
def test_tuple_i32() -> None:
a: i32 = 1
b: i32 = 2
t = (a, b)
a, b = t
assert a == 1
assert b == 2
x: Any = t
tt: Tuple[i32, i32] = x
assert tt == (1, 2)
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