There are libraries you can test your Elixir Code with. The official library as we all know is ExUnit Docs.
To Get a basic walk I suggest you look thru the docs.
The TLDR version of this link -
In an application generated with the mix command test files are placed in the test folder.
These file need to end in a *_test.exs file extension this denotes that it's elixir script file.
Like a lot of other libraries ExUnit has a DSL that's goal is to help you specify in plain english the goal of components of your code.
* For General Setup and organizing your tests
describe
setup
setup_all
- These macros do the bulk of the grunt work
test
assert
assert_receive
capture_io and capture_log
This is how you run a script test
$> elixir hello_world_test.exs
$> elixir -r **/*_test.exs
This can get boring pretty quickly.
Check out