If you are asking how you’d launch each app, the commands should be testsnapone.test1 and testsnapone.test2
Edit: I see they are declared as daemons - thanks ppd for spotting that.
You really need to provide us with the error messages you are facing etc. Generally, try to answer the following questions when seeking help:
What is happening? What’s the current output of the tool (snapcraft or the running program)? Error messages, anything like that.
What do you expect to happen? What are you trying to achieve? What is the purpose of your program? Provide context here.
What have you tried so far? Generally a good idea; people are more willing to help if an earnest attempt has been made. Also, this provides context and we can see what you’re actually trying to do.
How can we reproduce the issue? If possible, give us access to the source, the repository etc. People can quickly judge whether stuff is right if they can see the whole picture. Trying to guess your problem is not going to be the favourite pastime of the experts here.
What is your environment? In case the issue is not an obvious one, it might sometimes also be related to the versions of software or operating system you use. The environment is most likely not part of your issue here, but it’s still an important thing to keep in mind if you report issues in bug trackers or in forums.