[Tutor] unittest difficulty

[Japhy Bartlett]

Is `0.0` the troublesome float here?




On Wed, Jul 19, 2017 at 7:35 AM, Shall, Sydney <sydney.shall at kcl.ac.uk>
wrote:

> I am learning to use unittest.
>
> I have written a program that runs as it should.
> 247 tests give me a satisfactory answer.
>
> I have now added one more test and I get an error which I do not
> understand.
>
> The two relevant tests are:
>
>  def test_type_capitalsadvanced(self):
>         self.assertEqual(type(self.capitalsadvanced), numpy.ndarray)
>
>  def test_zero_in_capitalsadvanced(self):
>         self.assertIn(self.capitalsadvanced, 0.0)
>
> The error message is:
>
> Traceback (most recent call last):
>   File "/Users/sydney/Capital/Capital_with_productivity/Current_Versions/testPOCWP_V2.py",
> line 320, in test_zero_in_capitalsadvanced
>     self.assertIn(self.capitalsadvanced, 0.0)
>   File "/Users/sydney/anaconda/lib/python3.6/unittest/case.py", line
> 1077, in assertIn
>     if member not in container:
> TypeError: argument of type 'float' is not iterable
>
> Final output from the tests is :
>
> Ran 247 tests in 1.179s
>
> FAILED (failures=9, errors=1)
>
> The failures all arise from a 'nan'.
> It is this problem that I am trying to resolve.
>
> My problem is that the first test tells me correctly that the object
> capitalsadvanced is a numpy.ndarray. But the second test error message says
> it is a float.
>
> I should add that the program creates the initial data set by making use
> of the random function which is given a mean to work with. Thus each test
> run will be with different input data. But repeated tests show the same
> errors.
>
> Any guidance will be very welcome.
>
> Sydney
>
> _________
>
> Professor Sydney Shall
> Department of Haematology/Oncology
> Phone: +(0)2078489200
> E-Mail: sydney.shall
> [Correspondents outside the College should add @kcl.ac.uk]
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