This repository contains fairly simple code, just a function that writes a file to the filesystem and immediately reads it to verify the successful write.
The test the behaviour we use mocks (see https://github.com/jjh42/mock).
The mocked functions File.write! and File.read! use an Agent to store the content of the file.
We have two Elixir projects in this repository without_umbrella and with_umbrella, containing the identical lib/file_ex.ex and test/file_ex_test.exs.
When running mix test inside without_umbrella everything works fine.
But when running mix test inside with_umbrella the test runned gets killed:
** (EXIT from #PID<0.92.0>) killed