📚 API : make sure the API remains Exojax compatible

[erwanp]

💭 Description

Since #480 Radis embeds a common API shared by Radis-Line-by-line (spectrum calculation code) and Exojax

We should add tests in the Radis CI to make sure the API always remains fully compatible with Exojax functions (in terms of signature, i.e. input parmaters ).

I see it as :

• in the develop branch, add classes representatives of how Exojax uses the API ; and make sure it works
• before each new merge to the Master branch, add in our Travis-CI test suite a full installation & test of Exojax

@HajimeKawahara @YuiKasagi any idea / request on this ?

[HajimeKawahara]

This is a bit difficult problem but important for long time development. Writing some test code for api.py in ExoJAX, and importing these tests to radis? In general, writing the unit tests for database I/O is a bit challenging because it sometimes needs to be downloaded from the database websites.

[erwanp]

Yes. Do you already have some unitests in Exojax/api? I can borrow them and add them in Radis.api to ensure backward compatibility

[HajimeKawahara]

back to this issue. See exojax #462
Maybe you are right. We need to make the unittest of ExoJAX/api in exojax?
One thing I need to know is about making the unittests independent of the status of the ExoMol site. In other words, I want to avoid downloading from ExoMol. In exojax, we are using mock data for this purpose. How is this being handled in radis?

[erwanp]

We do 2 things :

• for some test cases, we are downloading small databases from Exojax (SiO for instance), which requires ExoMol to be online; but limits the data transfer
• for other test cases, we have mock-data available in https://github.com/radis/radis/tree/develop/radis/test/files and that can be fetched from anywhere with radis.test.utils.getTestFile

from radis.test.utils import getTestFile
from radis import load_spec
load_spec(getTestFile('CO_Tgas1500K_mole_fraction0.01.spec'))

These are very small files, shipped with Radis, usually used to ensure I/O compatibility

[HajimeKawahara]

Thanks. It looks there is no ExoMol fragment file available in radis.test.utils.getTestFile. Then, I will use a fragment ExoMol file in exojax.