| import sys |
| import unittest |
| from io import StringIO |
|
|
| from Cython.Utils import ( |
| _CACHE_NAME_PATTERN, _build_cache_name, _find_cache_attributes, |
| build_hex_version, cached_method, clear_method_caches, try_finally_contextmanager, |
| print_version, normalise_float_repr, |
| ) |
|
|
| METHOD_NAME = "cached_next" |
| CACHE_NAME = _build_cache_name(METHOD_NAME) |
| NAMES = CACHE_NAME, METHOD_NAME |
|
|
| class Cached: |
| @cached_method |
| def cached_next(self, x): |
| return next(x) |
|
|
|
|
| class TestCythonUtils(unittest.TestCase): |
| def test_build_hex_version(self): |
| self.assertEqual('0x001D00A1', build_hex_version('0.29a1')) |
| self.assertEqual('0x001D03C4', build_hex_version('0.29.3rc4')) |
| self.assertEqual('0x001D00F0', build_hex_version('0.29')) |
| self.assertEqual('0x040000F0', build_hex_version('4.0')) |
|
|
| |
|
|
| def test_cache_method_name(self): |
| method_name = "foo" |
| cache_name = _build_cache_name(method_name) |
| match = _CACHE_NAME_PATTERN.match(cache_name) |
|
|
| self.assertIsNot(match, None) |
| self.assertEqual(match.group(1), method_name) |
|
|
| def test_requirements_for_Cached(self): |
| obj = Cached() |
|
|
| self.assertFalse(hasattr(obj, CACHE_NAME)) |
| self.assertTrue(hasattr(obj, METHOD_NAME)) |
| self.set_of_names_equal(obj, set()) |
|
|
| def set_of_names_equal(self, obj, value): |
| self.assertEqual(set(_find_cache_attributes(obj)), value) |
|
|
| def test_find_cache_attributes(self): |
| obj = Cached() |
| method_name = "bar" |
| cache_name = _build_cache_name(method_name) |
|
|
| setattr(obj, CACHE_NAME, {}) |
| setattr(obj, cache_name, {}) |
|
|
| self.assertFalse(hasattr(obj, method_name)) |
| self.set_of_names_equal(obj, {NAMES, (cache_name, method_name)}) |
|
|
| def test_cached_method(self): |
| obj = Cached() |
| value = iter(range(3)) |
| cache = {(value,): 0} |
|
|
| |
| self.assertEqual(obj.cached_next(value), 0) |
| self.set_of_names_equal(obj, {NAMES}) |
| self.assertEqual(getattr(obj, CACHE_NAME), cache) |
|
|
| |
| self.assertEqual(obj.cached_next(value), 0) |
| self.set_of_names_equal(obj, {NAMES}) |
| self.assertEqual(getattr(obj, CACHE_NAME), cache) |
|
|
| def test_clear_method_caches(self): |
| obj = Cached() |
| value = iter(range(3)) |
| cache = {(value,): 1} |
|
|
| obj.cached_next(value) |
|
|
| clear_method_caches(obj) |
| self.set_of_names_equal(obj, set()) |
|
|
| self.assertEqual(obj.cached_next(value), 1) |
| self.set_of_names_equal(obj, {NAMES}) |
| self.assertEqual(getattr(obj, CACHE_NAME), cache) |
|
|
| def test_clear_method_caches_with_missing_method(self): |
| obj = Cached() |
| method_name = "bar" |
| cache_name = _build_cache_name(method_name) |
| names = cache_name, method_name |
|
|
| setattr(obj, cache_name, object()) |
|
|
| self.assertFalse(hasattr(obj, method_name)) |
| self.set_of_names_equal(obj, {names}) |
|
|
| clear_method_caches(obj) |
| self.set_of_names_equal(obj, {names}) |
|
|
| def test_try_finally_contextmanager(self): |
| states = [] |
| @try_finally_contextmanager |
| def gen(*args, **kwargs): |
| states.append("enter") |
| yield (args, kwargs) |
| states.append("exit") |
|
|
| with gen(1, 2, 3, x=4) as call_args: |
| assert states == ["enter"] |
| self.assertEqual(call_args, ((1, 2, 3), {'x': 4})) |
| assert states == ["enter", "exit"] |
|
|
| class MyException(RuntimeError): |
| pass |
|
|
| del states[:] |
| with self.assertRaises(MyException): |
| with gen(1, 2, y=4) as call_args: |
| assert states == ["enter"] |
| self.assertEqual(call_args, ((1, 2), {'y': 4})) |
| raise MyException("FAIL INSIDE") |
| assert states == ["enter", "exit"] |
|
|
| del states[:] |
| with self.assertRaises(StopIteration): |
| with gen(1, 2, y=4) as call_args: |
| assert states == ["enter"] |
| self.assertEqual(call_args, ((1, 2), {'y': 4})) |
| raise StopIteration("STOP") |
| assert states == ["enter", "exit"] |
|
|
| def test_print_version(self): |
| orig_stderr = sys.stderr |
| orig_stdout = sys.stdout |
| stderr = sys.stderr = StringIO() |
| stdout = sys.stdout = StringIO() |
| try: |
| print_version() |
| finally: |
| sys.stdout = orig_stdout |
| sys.stderr = orig_stderr |
|
|
| stdout = stdout.getvalue() |
| stderr = stderr.getvalue() |
|
|
| from .. import __version__ as version |
| self.assertIn(version, stdout) |
| if stderr: |
| self.assertIn(version, stderr) |
|
|
| def test_print_version_stdouterr(self): |
| orig_stderr = sys.stderr |
| orig_stdout = sys.stdout |
| stdout = sys.stdout = sys.stderr = StringIO() |
| try: |
| print_version() |
| finally: |
| sys.stdout = orig_stdout |
| sys.stderr = orig_stderr |
|
|
| stdout = stdout.getvalue() |
|
|
| from .. import __version__ as version |
| self.assertIn(version, stdout) |
| self.assertEqual(stdout.count(version), 1) |
|
|
| def test_normalise_float_repr(self): |
| examples = [ |
| ('.0', '.0'), |
| ('.000000', '.0'), |
| ('.1', '.1'), |
| ('1.', '1.'), |
| ('1.0', '1.'), |
| ('1.000000000000000000000', '1.'), |
| ('00000000000000000000001.000000000000000000000', '1.'), |
| ('12345.0025', '12345.0025'), |
| ('1E5', '100000.'), |
| ('.1E-5', '.000001'), |
| ('1.1E-5', '.000011'), |
| ('12.3E-5', '.000123'), |
| ('.1E10', '1000000000.'), |
| ('1.1E10', '11000000000.'), |
| ('123.4E10', '1234000000000.'), |
| ('123.456E0', '123.456'), |
| ('123.456E-1', '12.3456'), |
| ('123.456E-2', '1.23456'), |
| ('123.456E1', '1234.56'), |
| ('123.456E2', '12345.6'), |
| ('2.1E80', '210000000000000000000000000000000000000000000000000000000000000000000000000000000.'), |
| ] |
|
|
| for float_str, norm_str in examples: |
| self.assertEqual(float(float_str), float(norm_str)) |
|
|
| result = normalise_float_repr(float_str) |
| self.assertEqual(float(float_str), float(result)) |
| self.assertEqual( |
| result, norm_str, |
| "normalise_float_repr(%r) == %r != %r (%.330f)" % (float_str, result, norm_str, float(float_str)) |
| ) |
|
|
