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I have a test that reads Auth Code from mailbox and uses it to log in. I use Gmail API for that.

I would like to have several such tests that will run in parallel.

However, I don't know, how to distinguish emails from each other, because the only thing that is different about 2 emails is this Auth Code.

So, race condition looks like this:

  1. test-1 sends an email at 00:00:00
  2. test-2 sends an email at 00:00:01
  3. it takes 3 seconds for the email-1 to arrive => 00:00:03,
  4. it takes only 1 second for the email-2 to arrive => 00:00:02
  5. test-1 reads the first unread matching email, and it is an email-2 Result: Auth code is wrong.

So, my question here is: could you please think of any possible solution to avoid such a race condition and identify the email?

Thank you!

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  • Didn't you consider using different emails for different threads? – Alexey R. Aug 18 '20 at 18:33
  • Thank you, good idea – Ekaterina Korneeva Aug 19 '20 at 11:19
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Why don't you use different e-mail accoouns for this (of course if you are not going to test the case when user try to login two times and mix codes/use proper codes from two messages e.g. on 2 devices)?

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  • 2
    How about using Gmails wildcard feature "myname+randomWildcard@gmail.com" and then distinguish based on "randomWildcard"? – Paul Vincent Beigang Aug 19 '20 at 5:45

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