refactor: Use react-native-test-app to manage our test app

[Saadnajmi]

Overview

This PR replaces the test app in the repo with one managed by React Native Test App. This is mainly inspired by my want to add macOS support, which is currently blocked by / tracked at #141. Still, setting up the template test app now will make standing up the macOS portion of the test app trivial come time.

"React Native Test App" provides test apps for all platforms as a package. It handles the native bits, allowing you the developer to focus on the JS. There are a few advantages to using this package:

• It makes RN version updates easier, as it will handle the proper native code changes
• It makes targeting new platforms (like macOS or Windows) easier, since it has a template to configure each platform's test app.

Steps

I tried to document my steps well with my individual commit messages. In essence:

mv example/ example2 # Move the existing test app out of the way for a bit
yarn add -D react-native-test-app
yarn init-test-app
# The options I chose
# ✔ What is the name of your test app? … MenuExample
# ✔ Which platforms do you need test apps for? › Android, iOS
# ✔ Where should we create the new project? … example
cd example

After this I did a few extra things:

• Added generated lock files after running yarn / pod install in the new example test app folder
  • cd example && yarn && pod install --project-directory:ios
  • git add yarn.lock ios/Podfile.lock
• Ran yarn lint --fix to fix lint errors in the generated test app (mostly double quotes vs single quotes)
• Modified the example test app's package.json to include the following dependency so we can actually test menu:
  • "@react-native-menu/menu": "../"

Then finally, I copied over the JS source from the old test app, and deleted the old test app

rm example/index.js example/App.js
mv example2/index.tsx example.index.tsx
mv example2/src/App.tsx example/src/App.tsx
rm -rf example2/

Test Plan

Locally ran the iOS and Android test apps.

[Saadnajmi]

Since I couldn't add you as reviewers..
@tido64 who maintains react-native-test-app
@Naturalclar who maintains react-native menu

Alas, I couldn't add macOS support because react-native-macos isn't on 0.64 yet :(. I decided to go forward with moving the test app anyway to make it easier to add macOS support in the fut
Keeping this as a draft at the moment because run-ios doesn't work. If that's not a blocker, I can make it a full PR. Working on filing the right bugs in the cli now =)

[Saadnajmi]

@Naturalclar This should be ready for review! It should also make updating to RN 0.65 very simple, I just didn't want to bundle that in the same review. Thanks @tido64 for helping fix upstream CLI issues!

[Naturalclar]

@Saadnajmi @tido64 awesome! thank you guys so much!

[tido64]

Alas, I couldn't add macOS support because react-native-macos isn't on 0.64 yet :(.

Btw, the first 0.64 versions of react-native-macos is quite usable now ;)

[Saadnajmi]

Alas, I couldn't add macOS support because react-native-macos isn't on 0.64 yet :(.

Btw, the first 0.64 versions of react-native-macos is quite usable now ;)

Yep! I have a working menu component I wrote for macOS elsewhere that I can port here once I get the chance!