Running tests in an umbrella app

From the collection Elixir

mix task

tdd

elixir

umbrella apps

To run all tests

mix cmd --app child_app_name mix test --color

Specific file/line

mix cmd --app child_app_name mix test test/child_app_name_nice_test.exs:69 --color

We can also define a Mix task to make our life easier!

def aliases do
  [
    child_test: "cmd --app child_app_name mix test --color"
  ]
end

Then you call

mix child_test

mix child_test test/child_app_name_nice_test.exs:69