Test the debug info module

[igaray]

The src/debug_info.rs module is barely tested and could use some coverage.

[lordshashank]

Hey, I can work on this one.

[lordshashank]

@igaray , wanted to know where to configure tests for module, should I write tests in same file, or configure them in tests folder, or something else?

[igaray]

So far we've been putting them in the same file. If it becomes too large we can see about moving the test module to a separate file. Thanks!