[Test] Add synchronizer in UserStateFactory to avoid randomly failed

[Lisooo790926]

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Summary

Fix the randomly test failed issue

Linked Issue

#119

Details

add await before create method

Impacted Areas

signup test

Tests

Possible Impacts

signup test

Visual Materials

Verification Steps

Todo

Checklist

• All new and existing tests pass
• My changes do not introduce new security vulnerabilities
• Run yarn lint:fix

[chentihe]

I guess the problem is from the UserStateFactory. In the UserStateFactory, there's no synchronizer, while we initiate the UserStateFactory, the type of synchronizer is Synchronizer not UnirepSocialSynchronizer whose eventHandler does not contain UnirepApp events. Hence, even we execute userState.waitForSync(), the synchronizer does not sync the UserSignUp event.

[Lisooo790926]

Thanks @chentihe, I think this is the root cause! Add one more commit for this UserStateFactory.
However, I think frontend will meet the same issue, I will leave await until synchorinzer has been changed in all createUserState.
reference:

• Unirep UserState
• User.tsx #createUserState

[vivianjeng]

you can init a user state without a synchronizer

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[chentihe]

The unit test will pass randomly because there's a UnirepSocialSynchronizer while the server starts. UnirepSocialSynchronizer will also fetch the new block to handle the event asynchronously. Because of this, the unit test may pass randomly. we still need to set UnirepSocialSynchronizer into UserState to prevent this error.