[NFC] Add in unit test to prove that domain tokens are able to be inc…

[seamuslee001]

…ldued in peition emails

Overview

This adds in a unit test to cover off the fact that domain tokens can be use in Petition thank you emails

Before

No Test

After

Test

ping @eileenmcnaughton @JoeMurray

[civibot]

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[eileenmcnaughton]

thanks @seamuslee001 - the red x is jenkins making style commentary

Will we follow up by switching petitions to use token compat in some way? (Where are the lines that do the replacement in this flow?)

[seamuslee001]

@eileenmcnaughton it was more so I didn't think you could use domain tokens in these workflow templates and started by writing a unit test for it and seem to work so figured more tests the better. For petition tokens it seems to rely on https://github.com/civicrm/civicrm-core/blob/master/CRM/Campaign/BAO/Petition.php#L579 and https://github.com/civicrm/civicrm-core/blob/master/CRM/Campaign/BAO/Petition.php#L644

[eileenmcnaughton]

@seamuslee001 so it's already swapped out in sendmail