I would like to use nodemailer in a few tests to be able to pragmatically test the contents of an email that is sent. So far, its working great but there is one issue I haven’t been able to solve.
I am using the createTestAccount from the Javascript nodemailer, and notice that it often returns me the same test email (I think it uses the same email for a period of time?)
How can I use this to always generate different emails?
I have a condition where I my code fails if the email isn’t unique across tests.
As an example, a flow I am testing is:
- [behind the scenes a user is created in the database]
- User goes to sign in page
- User enters email and is asked to enter one time password
- User signs into email and gets code
- User enters code into website and is successfully signed in
The email with the one time password is sent via an external service so I can’t mock it.
For each of my tests there are different configurations so I need a unique user I create in the background for each test. My tests also change the information about the user (in the database). I am also running these tests in parallel so using the same user will result in tests being influenced by other tests.
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Answer
After looking the source code of nodemailer I found there is a cache you can disabled by ETHEREAL_CACHE=false. This generates new emails every time.