New submission from Mark Dickinson <[email protected]>:
>From the tests for Vec2D.__abs__ in the turtle module we have:
def test_distance(self):
vec = Vec2D(6, 8)
expected = 10
self.assertEqual(abs(vec), expected)
vec = Vec2D(0, 0)
expected = 0
self.assertEqual(abs(vec), expected)
vec = Vec2D(2.5, 6)
expected = 6.5
self.assertEqual(abs(vec), expected)
GitHub link:
https://github.com/python/cpython/blob/8158e059e9952f08d19a18d3e9e021cee2393cd2/Lib/test/test_turtle.py#L237-L248
The first test was reported as failing in issue #44728, with error:
======================================================================
FAIL: test_distance (test.test_turtle.TestVec2D)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/build/python/src/Python-3.9.6/Lib/test/test_turtle.py", line 237, in
test_distance
self.assertEqual(abs(vec), expected)
AssertionError: 9.999999999999998 != 10
The first and last test should use assertAlmostEqual with a suitable tolerance
(the default tolerance is probably fine).
----------
messages: 398166
nosy: mark.dickinson
priority: normal
severity: normal
status: open
title: turtle: tests for Vec2D.__abs__ are too strict
_______________________________________
Python tracker <[email protected]>
<https://bugs.python.org/issue44734>
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