Keeping timeouts active while tracing tests

almirsarajcic

1 hour ago

0 comments

Copy link

AppSignal Slow Ecto Query? See The Exact Line. Trace Ecto queries to the line of code. Errors, traces, logs, BEAM metrics in one tool. Start Free, No Card Start Free, No Card

A test can stop timing out when you rerun it with --trace:

@tag timeout: 10
test "slow work" do
  Process.sleep(50)
  assert true
end

mix test fails this test after 10 milliseconds. mix test --trace passes it because trace mode sets test timeouts to infinity, not only max_cases to 1.

If you only need serial execution while chasing a race, keep the timeout active:

mix test test/slow_test.exs --max-cases 1

Mind you, --slowest and --slowest-modules enable trace mode too.

https://hexdocs.pm/mix/Mix.Tasks.Test.html#module-command-line-options

Keeping timeouts active while tracing tests

Comments (0)