OkNo. A citizenship certificate is not a travel document.
You are expected to use a Canadian passport when traveling to Canada (https://www.canada.ca/en/immigration-refugees-citizenship/services/visit-canada/dual-canadian-citizens-visit-canada.html).
If you have to travel soon after your citizenship ceremony you can apply for a passport urgently (at a passport office). You can apply 2 business days after your ceremony, and with urgent processing you can pick up your passport on the 2nd business day after that, so it doesn't take very long to get a Canadian passport.
Thank you
My test is on 26 April
And i ll travel july do u think from the day of test until the end of june is enough to get the oath cermony