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Code Issues Projects Releases Packages Wiki Activity Actions 17

bpo-44357:Add math.cbrt() function: Cube Root (GH-26622)

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* Add math.cbrt() function: Cube Root

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Mark Dickinson <dickinsm@gmail.com>
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Ajith Ramachandran 2021-06-10 22:12:09 +05:30 • committed by GitHub
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commit ac867f10b4
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16
Lib/test/test_math.py
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@ -377,6 +377,22 @@ class MathTests(unittest.TestCase):
self.assertTrue(math.isnan(math.atan2(NAN, INF)))
self.assertTrue(math.isnan(math.atan2(NAN, NAN)))
def testCbrt(self):
self.assertRaises(TypeError, math.cbrt)
self.ftest('cbrt(0)', math.cbrt(0), 0)
self.ftest('cbrt(1)', math.cbrt(1), 1)
self.ftest('cbrt(8)', math.cbrt(8), 2)
self.ftest('cbrt(0.0)', math.cbrt(0.0), 0.0)
self.ftest('cbrt(-0.0)', math.cbrt(-0.0), -0.0)
self.ftest('cbrt(1.2)', math.cbrt(1.2), 1.062658569182611)
self.ftest('cbrt(-2.6)', math.cbrt(-2.6), -1.375068867074141)
self.ftest('cbrt(27)', math.cbrt(27), 3)
self.ftest('cbrt(-1)', math.cbrt(-1), -1)
self.ftest('cbrt(-27)', math.cbrt(-27), -3)
self.assertEqual(math.cbrt(INF), INF)
self.assertEqual(math.cbrt(NINF), NINF)
self.assertTrue(math.isnan(math.cbrt(NAN)))
def testCeil(self):
self.assertRaises(TypeError, math.ceil)
self.assertEqual(int, type(math.ceil(0.5)))