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manpreet Best Answer 2 years ago

I'm pretty new in Elixir, but have a lot fun with it!

I came from Ruby world, so start looking analogy. And there is exist debugging tool pry. Using binding.pry I can interrupt any session. I found something similar in Elixir – IEx.pry. But it doesn't work when I'm testing something through ExUnit.

Question – is it is possible to interrupt testing session and run iex with current environment?

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manpreet 2 years ago

You need to start your tests inside an iex session - you can do that by running iex -S mix test. Then you can use IEx.pry inside your test:

require IEx

test "the truth" do
  one = 1
  IEx.pry
  assert one + one == 2
end

You'll be asked if you want to allow prying into the ses sion:

Request to pry #PID<0.143.0> at test/test_app_test.exs:7. Allow? [Yn]

And all the context at that point will be available to you:

pry(1)> one
1

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