Re: [boost] Boost Test Library: general floating point comparisons

From: Hugo Duncan (hugoduncan_at_[hidden])
Date: 2007-02-16 12:03:35

Hi,

Just to chime in with my problems using BOOST_CHECK_CLOSE ...

I always have problems when checking for small numbers or zero.  I write  
something like BOOST_CHECK_CLOSE(0,x,1e-5) and start wondering why it  
fails, then rewrite the test using an epsilon value.

When I know the value is going to be near zero this is ok, but sometimes  
tests are written for computed values.  A possible solution would be to  
have a check that uses the maximum of a relative and an absolute tolerance.

Hugo