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import warnings
import pytest
import gmpy2
from gmpy2 import (context, get_context, ieee, local_context, mpc, mpfr, mpz,
set_context)
def test_context_abs():
ctx = gmpy2.context()
assert ctx.abs(-1) == mpz(1)
assert ctx.abs(0) == mpz(0)
assert ctx.abs(1) == mpz(1)
assert ctx.abs(mpz(8)) == mpz(8)
assert ctx.abs(mpz(-8)) == mpz(8)
assert ctx.abs(-1.0) == mpfr('1.0')
assert ctx.abs(mpfr(-2)) == mpfr('2.0')
assert ctx.abs(2+3j) == mpfr('3.6055512754639891')
assert ctx.abs(mpc(2+3j)) == mpfr('3.6055512754639891')
def test_context_ieee():
ctx = ieee(32)
assert (ctx.precision == 24 and ctx.emax == 128 and
ctx.emin == -148 and ctx.subnormalize)
ctx = ieee(64)
assert (ctx.precision == 53 and ctx.emax == 1024 and
ctx.emin == -1073 and ctx.subnormalize)
ctx = ieee(128)
assert (ctx.precision == 113 and ctx.emax == 16384 and
ctx.emin == -16493 and ctx.subnormalize)
ctx = ieee(256)
assert (ctx.precision == 237 and ctx.emax == 262144 and
ctx.emin == -262377 and ctx.subnormalize)
pytest.raises(ValueError, lambda: ieee(-1))
pytest.raises(TypeError, lambda: ieee("a"))
set_context(ieee(32))
assert gmpy2.const_pi().digits(2) == ('110010010000111111011011', 2, 24)
set_context(ieee(64))
assert gmpy2.const_pi().digits(2) == ('11001001000011111101101010100010001000010110100011000', 2, 53)
set_context(ieee(128))
assert gmpy2.const_pi().digits(2) == ('11001001000011111101101010100010001000010110100011000010001101001100010011000110011000101000101110000000110111000', 2, 113)
def test_context():
ctx = context()
assert (ctx.precision == 53 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
ctx = context(precision=100)
assert (ctx.precision == 100 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
ctx = context(real_prec=100)
assert (ctx.precision == 53 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize and
ctx.real_prec == 100)
ctx = context(real_prec=100,imag_prec=200)
assert (ctx.precision == 53 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize and
ctx.real_prec == 100 and ctx.imag_prec == 200)
pytest.raises(ValueError, lambda: context(1, 2))
pytest.raises(ValueError, lambda: context(spam=123))
def test_get_context():
set_context(context())
ctx = get_context()
assert (ctx.precision == 53 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
ctx = get_context()
ctx.precision = 100
assert (ctx.precision == 100 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
ctx = get_context()
assert (ctx.precision == 100 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
b = ctx.copy()
b.precision = 200
assert (b.precision == 200 and b.emax == 1073741823 and
b.emin == -1073741823 and not b.subnormalize)
assert (ctx.precision == 100 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
ctx = get_context()
assert (ctx.precision == 100 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
def test_context_2():
set_context(context())
with context() as ctx:
assert ctx.precision == 53
ctx.precision += 20
assert ctx.precision == 73
ctx = get_context()
assert (ctx.precision == 53 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
with context(ieee(64)) as ctx:
assert (ctx.precision == 53 and ctx.emax == 1024 and
ctx.emin == -1073 and ctx.subnormalize)
ctx = get_context()
assert (ctx.precision == 53 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
with get_context() as ctx:
assert ctx.precision == 53
ctx.precision += 100
assert ctx.precision == 153
ctx = get_context()
assert (ctx.precision == 53 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
with context(precision=200) as ctx:
assert ctx.precision == 200
ctx.precision += 100
assert ctx.precision == 300
ctx = get_context()
assert (ctx.precision == 53 and ctx.emax == 1073741823 and
ctx.emin == -1073741823 and not ctx.subnormalize)
def test_nested_context():
set_context(context())
r = [get_context().precision]
with ieee(128):
r.append(get_context().precision)
with ieee(256):
r.append(get_context().precision)
with ieee(512):
r.append(get_context().precision)
r.append(get_context().precision)
r.append(get_context().precision)
r.append(get_context().precision)
assert r == [53, 113, 237, 489, 237, 113, 53]
@pytest.mark.filterwarnings("ignore:local_context().*:DeprecationWarning")
def test_nested_local_context():
set_context(context())
r = [get_context().precision]
with local_context(ieee(128)):
r.append(get_context().precision)
with local_context(ieee(256)):
r.append(get_context().precision)
with local_context(ieee(512)):
r.append(get_context().precision)
r.append(get_context().precision)
r.append(get_context().precision)
r.append(get_context().precision)
assert r == [53, 113, 237, 489, 237, 113, 53]
def test_context_repr():
ctx = get_context()
assert repr(ctx) == \
"""context(precision=53, real_prec=Default, imag_prec=Default,\n\
round=RoundToNearest, real_round=Default, imag_round=Default,\n\
emax=1073741823, emin=-1073741823,\n subnormalize=False,\n\
trap_underflow=False, underflow=False,\n trap_overflow=False,\
overflow=False,\n trap_inexact=False, inexact=False,\n\
trap_invalid=False, invalid=False,\n trap_erange=False,\
erange=False,\n trap_divzero=False, divzero=False,\n\
allow_complex=False,\n rational_division=False,\n\
allow_release_gil=False)"""
ctx.real_prec = 100
ctx.imag_prec = 200
assert repr(ctx) == \
"""context(precision=53, real_prec=100, imag_prec=200,\n\
round=RoundToNearest, real_round=Default, imag_round=Default,\n\
emax=1073741823, emin=-1073741823,\n subnormalize=False,\n\
trap_underflow=False, underflow=False,\n trap_overflow=False,\
overflow=False,\n trap_inexact=False, inexact=False,\n\
trap_invalid=False, invalid=False,\n trap_erange=False,\
erange=False,\n trap_divzero=False, divzero=False,\n\
allow_complex=False,\n rational_division=False,\n\
allow_release_gil=False)"""
ctx.trap_invalid = True
assert repr(ctx) == \
"""context(precision=53, real_prec=100, imag_prec=200,\n\
round=RoundToNearest, real_round=Default, imag_round=Default,\n\
emax=1073741823, emin=-1073741823,\n subnormalize=False,\n\
trap_underflow=False, underflow=False,\n trap_overflow=False,\
overflow=False,\n trap_inexact=False, inexact=False,\n\
trap_invalid=True, invalid=False,\n trap_erange=False,\
erange=False,\n trap_divzero=False, divzero=False,\n\
allow_complex=False,\n rational_division=False,\n\
allow_release_gil=False)"""
pytest.raises(gmpy2.InvalidOperationError, lambda: mpfr('nan') % 123)
assert repr(ctx) == \
"""context(precision=53, real_prec=100, imag_prec=200,\n\
round=RoundToNearest, real_round=Default, imag_round=Default,\n\
emax=1073741823, emin=-1073741823,\n subnormalize=False,\n\
trap_underflow=False, underflow=False,\n trap_overflow=False,\
overflow=False,\n trap_inexact=False, inexact=False,\n\
trap_invalid=True, invalid=True,\n trap_erange=False,\
erange=False,\n trap_divzero=False, divzero=False,\n\
allow_complex=False,\n rational_division=False,\n\
allow_release_gil=False)"""
set_context(ieee(32))
ctx = get_context()
ctx.trap_underflow = True
c = mpc(0.1 + 0.1j)
pytest.raises(gmpy2.UnderflowResultError, lambda: c**201)
assert repr(ctx) == \
"""context(precision=24, real_prec=Default, imag_prec=Default,\n\
round=RoundToNearest, real_round=Default, imag_round=Default,\n\
emax=128, emin=-148,\n subnormalize=True,\n\
trap_underflow=True, underflow=True,\n trap_overflow=False,\
overflow=False,\n trap_inexact=False, inexact=True,\n\
trap_invalid=False, invalid=False,\n trap_erange=False,\
erange=False,\n trap_divzero=False, divzero=False,\n\
allow_complex=False,\n rational_division=False,\n\
allow_release_gil=False)"""
def test_local_context_deprecated():
with pytest.deprecated_call():
local_context()
with warnings.catch_warnings():
warnings.simplefilter("error", DeprecationWarning)
pytest.raises(DeprecationWarning, lambda: local_context())
@pytest.mark.filterwarnings("ignore:local_context().*:DeprecationWarning")
def test_local_context():
ctx_orig = get_context()
ctx_orig.precision = 123
with context() as ctx:
assert ctx.precision == 53
with local_context() as ctx:
assert ctx.precision == 123
ctx.precision = 321
with local_context(ctx_orig) as ctx:
assert ctx.precision == 123
pytest.raises(ValueError, lambda: local_context(1, 2))
pytest.raises(ValueError, lambda: local_context(spam=123))
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