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from fontTools.misc.py23 import tobytes
from fontTools.misc.textTools import deHexStr
import filecmp
from io import StringIO
import tempfile
from subprocess import check_call
import sys
import os
import unittest
from fontTools.misc.py23 import (
round2,
round3,
isclose,
redirect_stdout,
redirect_stderr,
)
PIPE_SCRIPT = """\
import sys
binary_stdin = open(sys.stdin.fileno(), mode='rb', closefd=False)
binary_stdout = open(sys.stdout.fileno(), mode='wb', closefd=False)
binary_stdout.write(binary_stdin.read())
"""
# the string contains a mix of line endings, plus the Win "EOF" charater (0x1A)
# 'hello\rworld\r\n\x1a\r\n'
TEST_BIN_DATA = deHexStr("68 65 6c 6c 6f 0d 77 6f 72 6c 64 0d 0a 1a 0d 0a")
class OpenFuncWrapperTest(unittest.TestCase):
@staticmethod
def make_temp(data):
with tempfile.NamedTemporaryFile(delete=False) as f:
f.write(tobytes(data))
return f.name
def diff_piped(self, data, import_statement):
script = self.make_temp("\n".join([import_statement, PIPE_SCRIPT]))
datafile = self.make_temp(data)
try:
with (
open(datafile, "rb") as infile,
tempfile.NamedTemporaryFile(delete=False) as outfile,
):
env = dict(os.environ)
env["PYTHONPATH"] = os.pathsep.join(sys.path)
check_call(
[sys.executable, script], stdin=infile, stdout=outfile, env=env
)
result = not filecmp.cmp(infile.name, outfile.name, shallow=False)
finally:
os.remove(script)
os.remove(datafile)
os.remove(outfile.name)
return result
def test_binary_pipe_py23_open_wrapper(self):
if self.diff_piped(TEST_BIN_DATA, "from fontTools.misc.py23 import open"):
self.fail("Input and output data differ!")
def test_binary_pipe_built_in_io_open(self):
result = self.diff_piped(TEST_BIN_DATA, "from io import open")
self.assertEqual(result, False)
class Round2Test(unittest.TestCase):
"""
Test cases taken from cpython 2.7 test suite:
https://github.com/python/cpython/blob/2.7/Lib/test/test_float.py#L748
Excludes the test cases that are not supported when using the `decimal`
module's `quantize` method.
"""
def test_second_argument_type(self):
# floats should be illegal
self.assertRaises(TypeError, round2, 3.14159, 2.0)
def test_halfway_cases(self):
# Halfway cases need special attention, since the current
# implementation has to deal with them specially. Note that
# 2.x rounds halfway values up (i.e., away from zero) while
# 3.x does round-half-to-even.
self.assertAlmostEqual(round2(0.125, 2), 0.13)
self.assertAlmostEqual(round2(0.375, 2), 0.38)
self.assertAlmostEqual(round2(0.625, 2), 0.63)
self.assertAlmostEqual(round2(0.875, 2), 0.88)
self.assertAlmostEqual(round2(-0.125, 2), -0.13)
self.assertAlmostEqual(round2(-0.375, 2), -0.38)
self.assertAlmostEqual(round2(-0.625, 2), -0.63)
self.assertAlmostEqual(round2(-0.875, 2), -0.88)
self.assertAlmostEqual(round2(0.25, 1), 0.3)
self.assertAlmostEqual(round2(0.75, 1), 0.8)
self.assertAlmostEqual(round2(-0.25, 1), -0.3)
self.assertAlmostEqual(round2(-0.75, 1), -0.8)
self.assertEqual(round2(-6.5, 0), -7.0)
self.assertEqual(round2(-5.5, 0), -6.0)
self.assertEqual(round2(-1.5, 0), -2.0)
self.assertEqual(round2(-0.5, 0), -1.0)
self.assertEqual(round2(0.5, 0), 1.0)
self.assertEqual(round2(1.5, 0), 2.0)
self.assertEqual(round2(2.5, 0), 3.0)
self.assertEqual(round2(3.5, 0), 4.0)
self.assertEqual(round2(4.5, 0), 5.0)
self.assertEqual(round2(5.5, 0), 6.0)
self.assertEqual(round2(6.5, 0), 7.0)
# same but without an explicit second argument; in 3.x these
# will give integers
self.assertEqual(round2(-6.5), -7.0)
self.assertEqual(round2(-5.5), -6.0)
self.assertEqual(round2(-1.5), -2.0)
self.assertEqual(round2(-0.5), -1.0)
self.assertEqual(round2(0.5), 1.0)
self.assertEqual(round2(1.5), 2.0)
self.assertEqual(round2(2.5), 3.0)
self.assertEqual(round2(3.5), 4.0)
self.assertEqual(round2(4.5), 5.0)
self.assertEqual(round2(5.5), 6.0)
self.assertEqual(round2(6.5), 7.0)
self.assertEqual(round2(-25.0, -1), -30.0)
self.assertEqual(round2(-15.0, -1), -20.0)
self.assertEqual(round2(-5.0, -1), -10.0)
self.assertEqual(round2(5.0, -1), 10.0)
self.assertEqual(round2(15.0, -1), 20.0)
self.assertEqual(round2(25.0, -1), 30.0)
self.assertEqual(round2(35.0, -1), 40.0)
self.assertEqual(round2(45.0, -1), 50.0)
self.assertEqual(round2(55.0, -1), 60.0)
self.assertEqual(round2(65.0, -1), 70.0)
self.assertEqual(round2(75.0, -1), 80.0)
self.assertEqual(round2(85.0, -1), 90.0)
self.assertEqual(round2(95.0, -1), 100.0)
self.assertEqual(round2(12325.0, -1), 12330.0)
self.assertEqual(round2(0, -1), 0.0)
self.assertEqual(round2(350.0, -2), 400.0)
self.assertEqual(round2(450.0, -2), 500.0)
self.assertAlmostEqual(round2(0.5e21, -21), 1e21)
self.assertAlmostEqual(round2(1.5e21, -21), 2e21)
self.assertAlmostEqual(round2(2.5e21, -21), 3e21)
self.assertAlmostEqual(round2(5.5e21, -21), 6e21)
self.assertAlmostEqual(round2(8.5e21, -21), 9e21)
self.assertAlmostEqual(round2(-1.5e22, -22), -2e22)
self.assertAlmostEqual(round2(-0.5e22, -22), -1e22)
self.assertAlmostEqual(round2(0.5e22, -22), 1e22)
self.assertAlmostEqual(round2(1.5e22, -22), 2e22)
class Round3Test(unittest.TestCase):
"""Same as above but results adapted for Python 3 round()"""
def test_second_argument_type(self):
# floats should be illegal
self.assertRaises(TypeError, round3, 3.14159, 2.0)
# None should be allowed
self.assertEqual(round3(1.0, None), 1)
# the following would raise an error with the built-in Python3.5 round:
# TypeError: 'NoneType' object cannot be interpreted as an integer
self.assertEqual(round3(1, None), 1)
def test_halfway_cases(self):
self.assertAlmostEqual(round3(0.125, 2), 0.12)
self.assertAlmostEqual(round3(0.375, 2), 0.38)
self.assertAlmostEqual(round3(0.625, 2), 0.62)
self.assertAlmostEqual(round3(0.875, 2), 0.88)
self.assertAlmostEqual(round3(-0.125, 2), -0.12)
self.assertAlmostEqual(round3(-0.375, 2), -0.38)
self.assertAlmostEqual(round3(-0.625, 2), -0.62)
self.assertAlmostEqual(round3(-0.875, 2), -0.88)
self.assertAlmostEqual(round3(0.25, 1), 0.2)
self.assertAlmostEqual(round3(0.75, 1), 0.8)
self.assertAlmostEqual(round3(-0.25, 1), -0.2)
self.assertAlmostEqual(round3(-0.75, 1), -0.8)
self.assertEqual(round3(-6.5, 0), -6.0)
self.assertEqual(round3(-5.5, 0), -6.0)
self.assertEqual(round3(-1.5, 0), -2.0)
self.assertEqual(round3(-0.5, 0), 0.0)
self.assertEqual(round3(0.5, 0), 0.0)
self.assertEqual(round3(1.5, 0), 2.0)
self.assertEqual(round3(2.5, 0), 2.0)
self.assertEqual(round3(3.5, 0), 4.0)
self.assertEqual(round3(4.5, 0), 4.0)
self.assertEqual(round3(5.5, 0), 6.0)
self.assertEqual(round3(6.5, 0), 6.0)
# same but without an explicit second argument; in 2.x these
# will give floats
self.assertEqual(round3(-6.5), -6)
self.assertEqual(round3(-5.5), -6)
self.assertEqual(round3(-1.5), -2.0)
self.assertEqual(round3(-0.5), 0)
self.assertEqual(round3(0.5), 0)
self.assertEqual(round3(1.5), 2)
self.assertEqual(round3(2.5), 2)
self.assertEqual(round3(3.5), 4)
self.assertEqual(round3(4.5), 4)
self.assertEqual(round3(5.5), 6)
self.assertEqual(round3(6.5), 6)
# no ndigits and input is already an integer: output == input
rv = round3(1)
self.assertEqual(rv, 1)
self.assertTrue(isinstance(rv, int))
rv = round3(1.0)
self.assertEqual(rv, 1)
self.assertTrue(isinstance(rv, int))
self.assertEqual(round3(-25.0, -1), -20.0)
self.assertEqual(round3(-15.0, -1), -20.0)
self.assertEqual(round3(-5.0, -1), 0.0)
self.assertEqual(round3(5.0, -1), 0.0)
self.assertEqual(round3(15.0, -1), 20.0)
self.assertEqual(round3(25.0, -1), 20.0)
self.assertEqual(round3(35.0, -1), 40.0)
self.assertEqual(round3(45.0, -1), 40.0)
self.assertEqual(round3(55.0, -1), 60.0)
self.assertEqual(round3(65.0, -1), 60.0)
self.assertEqual(round3(75.0, -1), 80.0)
self.assertEqual(round3(85.0, -1), 80.0)
self.assertEqual(round3(95.0, -1), 100.0)
self.assertEqual(round3(12325.0, -1), 12320.0)
self.assertEqual(round3(0, -1), 0.0)
self.assertEqual(round3(350.0, -2), 400.0)
self.assertEqual(round3(450.0, -2), 400.0)
self.assertAlmostEqual(round3(0.5e21, -21), 0.0)
self.assertAlmostEqual(round3(1.5e21, -21), 2e21)
self.assertAlmostEqual(round3(2.5e21, -21), 2e21)
self.assertAlmostEqual(round3(5.5e21, -21), 6e21)
self.assertAlmostEqual(round3(8.5e21, -21), 8e21)
self.assertAlmostEqual(round3(-1.5e22, -22), -2e22)
self.assertAlmostEqual(round3(-0.5e22, -22), 0.0)
self.assertAlmostEqual(round3(0.5e22, -22), 0.0)
self.assertAlmostEqual(round3(1.5e22, -22), 2e22)
NAN = float("nan")
INF = float("inf")
NINF = float("-inf")
class IsCloseTests(unittest.TestCase):
"""
Tests taken from Python 3.5 test_math.py:
https://hg.python.org/cpython/file/v3.5.2/Lib/test/test_math.py
"""
isclose = staticmethod(isclose)
def assertIsClose(self, a, b, *args, **kwargs):
self.assertTrue(
self.isclose(a, b, *args, **kwargs),
msg="%s and %s should be close!" % (a, b),
)
def assertIsNotClose(self, a, b, *args, **kwargs):
self.assertFalse(
self.isclose(a, b, *args, **kwargs),
msg="%s and %s should not be close!" % (a, b),
)
def assertAllClose(self, examples, *args, **kwargs):
for a, b in examples:
self.assertIsClose(a, b, *args, **kwargs)
def assertAllNotClose(self, examples, *args, **kwargs):
for a, b in examples:
self.assertIsNotClose(a, b, *args, **kwargs)
def test_negative_tolerances(self):
# ValueError should be raised if either tolerance is less than zero
with self.assertRaises(ValueError):
self.assertIsClose(1, 1, rel_tol=-1e-100)
with self.assertRaises(ValueError):
self.assertIsClose(1, 1, rel_tol=1e-100, abs_tol=-1e10)
def test_identical(self):
# identical values must test as close
identical_examples = [
(2.0, 2.0),
(0.1e200, 0.1e200),
(1.123e-300, 1.123e-300),
(12345, 12345.0),
(0.0, -0.0),
(345678, 345678),
]
self.assertAllClose(identical_examples, rel_tol=0.0, abs_tol=0.0)
def test_eight_decimal_places(self):
# examples that are close to 1e-8, but not 1e-9
eight_decimal_places_examples = [
(1e8, 1e8 + 1),
(-1e-8, -1.000000009e-8),
(1.12345678, 1.12345679),
]
self.assertAllClose(eight_decimal_places_examples, rel_tol=1e-8)
self.assertAllNotClose(eight_decimal_places_examples, rel_tol=1e-9)
def test_near_zero(self):
# values close to zero
near_zero_examples = [(1e-9, 0.0), (-1e-9, 0.0), (-1e-150, 0.0)]
# these should not be close to any rel_tol
self.assertAllNotClose(near_zero_examples, rel_tol=0.9)
# these should be close to abs_tol=1e-8
self.assertAllClose(near_zero_examples, abs_tol=1e-8)
def test_identical_infinite(self):
# these are close regardless of tolerance -- i.e. they are equal
self.assertIsClose(INF, INF)
self.assertIsClose(INF, INF, abs_tol=0.0)
self.assertIsClose(NINF, NINF)
self.assertIsClose(NINF, NINF, abs_tol=0.0)
def test_inf_ninf_nan(self):
# these should never be close (following IEEE 754 rules for equality)
not_close_examples = [
(NAN, NAN),
(NAN, 1e-100),
(1e-100, NAN),
(INF, NAN),
(NAN, INF),
(INF, NINF),
(INF, 1.0),
(1.0, INF),
(INF, 1e308),
(1e308, INF),
]
# use largest reasonable tolerance
self.assertAllNotClose(not_close_examples, abs_tol=0.999999999999999)
def test_zero_tolerance(self):
# test with zero tolerance
zero_tolerance_close_examples = [(1.0, 1.0), (-3.4, -3.4), (-1e-300, -1e-300)]
self.assertAllClose(zero_tolerance_close_examples, rel_tol=0.0)
zero_tolerance_not_close_examples = [
(1.0, 1.000000000000001),
(0.99999999999999, 1.0),
(1.0e200, 0.999999999999999e200),
]
self.assertAllNotClose(zero_tolerance_not_close_examples, rel_tol=0.0)
def test_assymetry(self):
# test the assymetry example from PEP 485
self.assertAllClose([(9, 10), (10, 9)], rel_tol=0.1)
def test_integers(self):
# test with integer values
integer_examples = [(100000001, 100000000), (123456789, 123456788)]
self.assertAllClose(integer_examples, rel_tol=1e-8)
self.assertAllNotClose(integer_examples, rel_tol=1e-9)
def test_decimals(self):
# test with Decimal values
from decimal import Decimal
decimal_examples = [
(Decimal("1.00000001"), Decimal("1.0")),
(Decimal("1.00000001e-20"), Decimal("1.0e-20")),
(Decimal("1.00000001e-100"), Decimal("1.0e-100")),
]
self.assertAllClose(decimal_examples, rel_tol=1e-8)
self.assertAllNotClose(decimal_examples, rel_tol=1e-9)
def test_fractions(self):
# test with Fraction values
from fractions import Fraction
# could use some more examples here!
fraction_examples = [(Fraction(1, 100000000) + 1, Fraction(1))]
self.assertAllClose(fraction_examples, rel_tol=1e-8)
self.assertAllNotClose(fraction_examples, rel_tol=1e-9)
class _TestRedirectStream:
redirect_stream = None
orig_stream = None
def test_no_redirect_in_init(self):
orig_stdout = getattr(sys, self.orig_stream)
self.redirect_stream(None)
self.assertIs(getattr(sys, self.orig_stream), orig_stdout)
def test_redirect_to_string_io(self):
f = StringIO()
msg = "Consider an API like help(), which prints directly to stdout"
orig_stdout = getattr(sys, self.orig_stream)
with self.redirect_stream(f):
print(msg, file=getattr(sys, self.orig_stream))
self.assertIs(getattr(sys, self.orig_stream), orig_stdout)
s = f.getvalue().strip()
self.assertEqual(s, msg)
def test_enter_result_is_target(self):
f = StringIO()
with self.redirect_stream(f) as enter_result:
self.assertIs(enter_result, f)
def test_cm_is_reusable(self):
f = StringIO()
write_to_f = self.redirect_stream(f)
orig_stdout = getattr(sys, self.orig_stream)
with write_to_f:
print("Hello", end=" ", file=getattr(sys, self.orig_stream))
with write_to_f:
print("World!", file=getattr(sys, self.orig_stream))
self.assertIs(getattr(sys, self.orig_stream), orig_stdout)
s = f.getvalue()
self.assertEqual(s, "Hello World!\n")
def test_cm_is_reentrant(self):
f = StringIO()
write_to_f = self.redirect_stream(f)
orig_stdout = getattr(sys, self.orig_stream)
with write_to_f:
print("Hello", end=" ", file=getattr(sys, self.orig_stream))
with write_to_f:
print("World!", file=getattr(sys, self.orig_stream))
self.assertIs(getattr(sys, self.orig_stream), orig_stdout)
s = f.getvalue()
self.assertEqual(s, "Hello World!\n")
class TestRedirectStdout(_TestRedirectStream, unittest.TestCase):
redirect_stream = redirect_stdout
orig_stream = "stdout"
class TestRedirectStderr(_TestRedirectStream, unittest.TestCase):
redirect_stream = redirect_stderr
orig_stream = "stderr"
if __name__ == "__main__":
sys.exit(unittest.main())
|
