[Pkg-javascript-devel] Bug#1011973: node-webpack-sources: autopkgtest failure TypeError: addMapping is not a function

[Akshay S Dinesh]

> with node-source-map 0.7 built from salsa master branch, there is only 
> 1 failure. 26 tests were failing earlier with node-source-map 0.6.
> 


This is a red herring.

The autopkgtest fails aren't related to node-source-map at all.

Specifically, the tests don't fail in gbp buildpackage, but only in 
autopkgtest, that too only in one particular stage.

That's because the __mocks__ that jest relies on are in the lib/helpers/ 
directory and that's not available somehow to the autopkgtest run. For 
example, if you do autopkgtest with --shell-fail and after it fails copy 
__mocks__ to /usr/share/nodejs/webpack-sources/lib/helpers and rerun the 
test with /usr/share/pkg-js-autopkgtest/runner it passes

You can replicate it by downloading upstream code and removing 
`__mocks__` folder and running yarnpkg test


https://wiki.debian.org/ContinuousIntegration/AutopkgtestBestPractices#Recommendations

 > Use upstream test-suite if they have as-installed test

The jest tests are not as-installed