R functions to write tests on about cdms.products

[lilyclements]

@lloyddewit how are you testing export functions in python?

[lloyddewit]

@lloyddewit how are you testing export functions in python?

@lilyclements I duplicate the tests in the test_*.R files here.

Currently, in the main branch, there aren't any tests for the export_*.R functions.

However, @HawardKetoyoMsatsi has submitted several PRs that propose tests for the export functions. In the Python layer, I initially implemented the tests in PR #78 . I'll also implement the tests in the other PRs, plus any other tests that are added.

In summary, if you (or @HawardKetoyoMsatsi ) can add new export tests, then I'll add these tests to the Python layer.

[lloyddewit]

@lilyclements I added a new task to the PR description:

• export_* functions contain ... parameters. Please add tests that pass ... parameters that have an observable impact on the converted file

Currently the Python wrapper does not support ... parameters but I would like to add this feature so I'd really appreciate a test that I could run directly in R, and also via the Python wrapper.

To start, it's enough for me if you could specify a single test just as a comment in this PR.

Thanks!

[lloyddewit]

@lilyclements I added a new task to the PR description to add a test for:

• export_climat_messages function