55 add unit tests for room creation

[odelcroi]

This PR adds unit tests for the TCHAP react component TchapCreateRoomDialog :

• rendering tests to check that the switch button is shown when due
• submit tests to check that the component invokes the room creation with the correct parameters.

It uses the framework Jest and Enzyme with Snapshots.

Static and Module mocking is widely use as there is no dependency injection :/

Side note : TchapCreateRoom has been mutated to a static class to ease mocking.. Maybe not necessary

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[celiacheff]

Je vais chipoter un peu mais pour moi les tests de components ne sont unitaires mais plutôt d'intégration (vu qu'il s'agit d'une dépendance externe au métier, que les tests sont plus lents et testent une collaboration). Après ça me choque pas plus que ça

[estellecomment]

General note : we need to be easily able to tell what is our code and what is element's, for future rebases with element.
So far we have added ":TCHAP:" in comments everywhere.

[odelcroi]

Key learnings :

• The actual configuration does not work with jest 27 or jest 28. It is stuck to jest 26 with an error of typescript transcompilation I guess (babel..).

• The configuration of enzyme is not taken from matrix-react-sdk for an unknown reason. It has been duplicated to a proper setupTests.js file. Though the rest of the configuration from matrix-react-sdk seems to be taken into account.

import Adapter from "@wojtekmaj/enzyme-adapter-react-17";
import { configure } from "enzyme";
configure({ adapter: new Adapter() });

• only the unit tests are executed to alleviate pressure on computer ressources

"testMatch": [
      "<rootDir>/test/unit-tests/**/*-test.[tj]s?(x)"
    ]

• the transformIgnorePatterns has been updated in order to work properly :

"transformIgnorePatterns": [
      "\/node_modules\/(?!matrix-js-sdk|matrix-react-sdk).+$"
    ]

[estellecomment]

CI fails :

• build is failing because of timeout. It took too long.
• static analysis : js-sdk is full of errors, react-sdk modules are not found (we could limit the check to our own code)
• tests : /node_modules/matrix-react-sdk/test/setupTests.js in the setupFilesAfterEnv option was not found -> the yarn linking is probably not working ?
• style lint : broken, needs yarn links ? Cannot find module 'matrix-react-sdk/.stylelintrc.js'