[Proj] Testing framework

[Kurt Schwehr]

So... Just to state my preference.  I think Google
Test(gtest/gmock/microbenchmark) would be great if PROJ decides to go that
way.  It's been run through the ringer with hundreds of millions of lines
of tests written with it and it covers most use cases without being to
heavy weight.  And I would be happy to contribute my tests to PROJ
(switching them to the PROJ license) and drop them from gdal-autotest2.

I really don't know Catch2 so I don't really have an opinion on how well it
works.

Either way, I will keep on doing PROJ/GEOS/GDAL testing in gtest for my own
work.

On Tue, May 29, 2018 at 1:57 PM, Mateusz Loskot <mateusz at loskot.net> wrote:

> On 29 May 2018 at 22:02, Kristian Evers <kreve at sdfe.dk> wrote:
> > On 29 May 2018, at 21:14, Mateusz Loskot <mateusz at loskot.net> wrote:
> >> On Tue, 29 May 2018, 20:37 Kristian Evers, <kreve at sdfe.dk> wrote:
> >>>
> >>> So in summation my proposed TODO list goes something like:
> >>>
> >>>     1. Move tests from src/ to the Catch2 framework
> >>>     2. Move selftest remnants in gie.c to the Catch2 framework
> >>>     3. Move shell-script tests in nad/ to test/
> >>>     4. Add a test framework for the command line applications, also in
> >>> test/
> >>>
> >>> Thoughts? What have I missed?
> >>
> >>
> >> Although might be to early, but perhaps an outline of tests organization
> >> into suites and cases.
> >>
> >> For example:
> >>
> >> - test suite per API function - a sort of unit kind of tests focused on
> >> exercising single function (similar tests also could verify definitions
> of
> >> data structures). Eg. Call foo(a, b) with valid, invalid, boundary,
> random,
> >> etc. values for parameters.
> >>
> >> - test suites of more complex test cases, more complex Arrangements
> >> preparing for actual test as well as more elaborate assertions
> following a
> >> testing act - I like to think of those as functional tests (function is
> a
> >> black box) or inter-function integration tests :) Eg.  Verifying
> conversion
> >> of X from CRS A to B gives expected results, depending on input valid,
> >> invalid, boundary…
> >
> > Your first point sounds like something we should do at least. We
> definitely
> > need tests for each function in the library. The second point, if I
> understand
> > correctly, is more or less covered by gie tests.
>
> Yes, I think so.
>
> Although, there are some cases where such Catch-based functional testing
> may be a good idea. For example, verification that pj_init and
> pj_init_plus for the
> same definition result in equialent instance of projPJ; any kind of
> verification
> of library/object states following interleaved/sequenced API calls;
> any kind of round-trips verification with assertions for intermediate
> results
> Such functional tests typically have more assertions per case than unit
> tests.
>
> Best regards,
> --
> Mateusz Loskot, http://mateusz.loskot.net
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>



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