[Octave-bug-tracker] [bug #62664] assert makes function give wrong answer

[Nicholas Jankowski]

Update of bug #62664 (project octave):

                  Status:                    None => Invalid                
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #2:

FYI savannah uses 



<code>
 
 

to set off code blocks.


assert is worknig fine. 


>> assert(foo(1,1,1,1),[1,1,1,1])
error: ASSERT errors for:  assert (foo (1, 1, 1, 1),[1, 1, 1, 1])

  Location  |  Observed  |  Expected  |  Reason
     .          O(1x1)       E(1x4)      Dimensions don't match


the output of foo(1,1,1,1), without specifying any other output variables, is
just out1. 

[out1, out2, out3, out4] = ...  is not creating a 4 elemnent array.  it's
populating four variables out1, out2, out3, and out4.


>> [o1, o2, o3, o4] = foo(1,2,3,4)
o1 = 1
o2 = 2
o3 = 3
o4 = 4


the one line version of assert only checks the first output argument, and
fails because they're different sizes.  e.g.,


>> foo(1,2,3,4) == [1,2,3,4]
ans =
  1  0  0  0

>> 1 == [1,2,3,4]
ans =
  1  0  0  0

>> [o1, o2, o3, o4] = foo(1,2,3,4)
o1 = 1
o2 = 2
o3 = 3
o4 = 4
>> [o1, o2, o3, o4] == [1,2,3,4]
ans =
  1  1  1  1


if this is for create a selftest using assert that checks the value of
multiple return arguments, you need to do it inside of a %!test block and
actually assign the outputs to variables before checking them with assert.

e.g.:


%!test 
%! [o1, o2, o3, o4] = foo (1,2,3,4)
%! assert (o1, 1)
%! assert (o2, 2)
%! assert (o3, 3)
%! assert (o4, 4)



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