No possibility to test behavior with different modules?

Sometimes flow works different in the following cases:

1. code in one file
2. code in different files

But it seems that we can’t write tests right now that can check the second case.

I tried to fix react-redux libdefs. I need to declare a connected React component in one file and check its usage in another to reproduce a bug. I tried to create TestComponent.js file near test_connect.js, but checker says that I need to use name for file that starts with test_. But when I renamed a file to test_component.js, I got an error

* react-redux_v5.x.x/flow_v0.54.x- (flow-v0.55.0): Unexpected Flow errors(2):
   Error: 2-test_connect.js:4
     4: import CC3 from './test_CC3';
                        ^^^^^^^^^^^^ ./test_CC3. Required module not found

Can we handle the situation somehow? Can I help?

[AndrewSouthpaw]

Sure thing! We’ll see how it goes, there’s still a chance we’ll need to revisit it some day, but hopefully this is a decent strategy to move us forward. Thanks for opening the issue.

[LoganBarnett]

Is there a known benefit to why we mangle the filenames now? It seems like that’s separate from actually finding the test files, so without more information it seems like removing the mangling is the best thing to do.