mirror of https://github.com/python/cpython
72 lines
2.0 KiB
Python
72 lines
2.0 KiB
Python
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import time
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import unittest
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from test.support import import_helper
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_testcapi = import_helper.import_module('_testcapi')
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PyTime_MIN = _testcapi.PyTime_MIN
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PyTime_MAX = _testcapi.PyTime_MAX
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SEC_TO_NS = 10 ** 9
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DAY_TO_SEC = (24 * 60 * 60)
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# Worst clock resolution: maximum delta between two clock reads.
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CLOCK_RES = 0.050
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class CAPITest(unittest.TestCase):
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def test_min_max(self):
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# PyTime_t is just int64_t
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self.assertEqual(PyTime_MIN, -2**63)
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self.assertEqual(PyTime_MAX, 2**63 - 1)
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def check_clock(self, c_func, py_func):
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t1 = c_func()
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t2 = py_func()
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self.assertAlmostEqual(t1, t2, delta=CLOCK_RES)
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def test_assecondsdouble(self):
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# Test PyTime_AsSecondsDouble()
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def ns_to_sec(ns):
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if abs(ns) % SEC_TO_NS == 0:
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return float(ns // SEC_TO_NS)
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else:
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return float(ns) / SEC_TO_NS
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seconds = (
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0,
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1,
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DAY_TO_SEC,
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365 * DAY_TO_SEC,
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)
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values = {
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PyTime_MIN,
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PyTime_MIN + 1,
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PyTime_MAX - 1,
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PyTime_MAX,
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}
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for second in seconds:
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ns = second * SEC_TO_NS
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values.add(ns)
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# test nanosecond before/after to test rounding
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values.add(ns - 1)
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values.add(ns + 1)
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for ns in list(values):
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if (-ns) > PyTime_MAX:
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continue
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values.add(-ns)
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for ns in sorted(values):
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with self.subTest(ns=ns):
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self.assertEqual(_testcapi.PyTime_AsSecondsDouble(ns),
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ns_to_sec(ns))
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def test_monotonic(self):
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# Test PyTime_Monotonic()
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self.check_clock(_testcapi.PyTime_Monotonic, time.monotonic)
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def test_perf_counter(self):
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# Test PyTime_PerfCounter()
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self.check_clock(_testcapi.PyTime_PerfCounter, time.perf_counter)
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def test_time(self):
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# Test PyTime_time()
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self.check_clock(_testcapi.PyTime_Time, time.time)
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