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import os
import sys
import unittest
from precis_i18n.derived import derived_property
from precis_i18n.unicode import UnicodeData
try:
import unicodedata2
except ImportError:
unicodedata2 = None
class TestDerivedProperties(unittest.TestCase):
"""Test output of derived_property function."""
def test_derived_props(self):
"""Compare derived properties against a "golden" file using built-in
unicodedata module.
"""
self._test_derived_props(UnicodeData())
@unittest.skipIf(unicodedata2 is None, "unicodedata2 not available")
def test_derived_props_unicodedata2(self):
"""Compare derived properties against a "golden" file using
pip-installed unicodedata2 module.
"""
ucd = UnicodeData(unicodedata2)
assert ucd.version in {10.0, 12.0, 14.0, 15.0, 15.1}
self._test_derived_props(ucd)
def _test_derived_props(self, ucd):
"""Compare derived properties against a "golden" file."""
goldname = "derived-props-%.1f.txt" % ucd.version
goldpath = os.path.join(os.path.dirname(__file__), goldname)
with open(goldpath) as golden:
derived_props = enumerate_derived_props(ucd)
for line in golden:
line = line.strip()
if not line:
continue
expected = "%04X-%04X %s" % next(derived_props)
self.assertEqual(line, expected)
def enumerate_derived_props(ucd, begin=0, end=0x00110000):
"""Iterable producing all derived_property values for a particular range.
Produces a sequence of tuples (begin, end, property).
"""
start = begin
prev = "/".join(derived_property(start, ucd))
for cp in range(start + 1, end):
prop = "/".join(derived_property(cp, ucd))
if prop != prev:
yield (start, cp - 1, prev)
start = cp
prev = prop
yield (start, cp, prev)
def main():
ucd = UnicodeData()
print("Unicode %.1f" % ucd.version, file=sys.stderr)
# Dump gold file to stdout.
for p in enumerate_derived_props(ucd):
print("%04X-%04X %s" % p)
if __name__ == "__main__":
main()
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