stan-dev/math: fvar testing

[Daniel Lee]

Anyone, in particular Rob, know what the status is on testing the functions we have? There are a couple people that have volunteered to help and I want to know the status and where and how we can get people to help with testing.

Thanks.

Daniel

[Rob Trangucci]

Most, if not all, scalar and matrix functions are tested with fvar<var> and fvar<fvar<var> > for:

 - valid values

 - invalid values

 - nan values

 - invalid arguments

 - gradients equal expected values

 - function values equal expected values

Most scalar functions and some matrix functions are tested with fvar<var> and fvar<fvar<var> > for:

 - diagonals of hessians vs. expected values

 - diagonals of gradients of hessians vs. expected values

Few, if any, scalar and matrix functions are tested with fvar<var> and fvar<var<var> > for:

 - Full Hessians vs. expected values (and/or finite diff)

 - Gradients of the Hessians vs. expected values (and/or finite diff)

It also looks as if the unit tests in test/unit/math/mix/mat/prob are very sparse and test only that function values equal expected values.

If you need a more full accounting of test inventory, let me know and I/we can write up a file-by-file description.

Rob

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