Fix paths in objc-test.sh, temporarily exclude /IntegrationTests (#36648)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/36648

Changelog: [Internal]

Blocker for https://github.com/facebook/react-native/pull/36623. The `test-ios` job in CI was misconfigured following the monorepo migration — and this becomes load-bearing with the incoming version of React Native CLI.

- Update `objc-test.sh` to run in `packages/rn-tester`, and exclude tests under `/IntegrationTests` which are outside of a Metro project directory.
    - **This is temporary** — a task has been created to move/split up/otherwise restore tests in `IntegrationTests`, which cipolleschi is following up (thanks!).
- Also fix `yarn start` script in `packages/rn-tester`.

Reviewed By: cipolleschi

Differential Revision: D44416533

fbshipit-source-id: 59c5b743d9d8fda206a12e37d94324ed9bfd703e

packages/rn-tester/RNTester/RNTester.xctestplan

@@ -28,6 +28,7 @@
   },
   "testTargets" : [
     {
+      "enabled": false,
       "target" : {
         "containerPath" : "container:RNTesterPods.xcodeproj",
         "identifier" : "E7DB215222B2F332005AC45F",

packages/rn-tester/package.json

@@ -11,7 +11,7 @@
     "directory": "packages/rn-tester"
   },
   "scripts": {
-    "start": "../react-native/scripts/packager.sh",
+    "start": "react-native start",
     "install-android-jsc": "../../gradlew :packages:rn-tester:android:app:installJscDebug",
     "install-android-hermes": "../../gradlew :packages:rn-tester:android:app:installHermesDebug",
     "clean-android": "rm -rf android/app/build",

scripts/objc-test.sh

@@ -75,9 +75,9 @@ waitForWebSocketServer() {
 
 runTests() {
   # shellcheck disable=SC1091
-  source "./scripts/.tests.env"
+  source "$ROOT/scripts/.tests.env"
   xcodebuild build test \
-    -workspace packages/rn-tester/RNTesterPods.xcworkspace \
+    -workspace RNTesterPods.xcworkspace \
     -scheme RNTester \
     -sdk iphonesimulator \
     -destination "platform=iOS Simulator,name=$IOS_DEVICE,OS=$IOS_TARGET_OS" \
@@ -86,7 +86,7 @@ runTests() {
 
 buildProject() {
   xcodebuild build \
-    -workspace packages/rn-tester/RNTesterPods.xcworkspace \
+    -workspace RNTesterPods.xcworkspace \
     -scheme RNTester \
     -sdk iphonesimulator
 }
@@ -105,16 +105,21 @@ xcbeautifyFormat() {
   xcbeautify --report junit --report-path "$REPORTS_DIR/ios/results.xml"
 }
 
-preloadBundles() {
-  # Preload the RNTesterApp bundle for better performance in integration tests
-  curl -s 'http://localhost:8081/packages/rn-tester/js/RNTesterApp.ios.bundle?platform=ios&dev=true' -o /dev/null
-  curl -s 'http://localhost:8081/packages/rn-tester/js/RNTesterApp.ios.bundle?platform=ios&dev=true&minify=false' -o /dev/null
+preloadBundlesRNIntegrationTests() {
+  # Preload IntegrationTests bundles (/)
+  # TODO(T149119847): These need to be relocated into a dir with a Metro config
   curl -s 'http://localhost:8081/IntegrationTests/IntegrationTestsApp.bundle?platform=ios&dev=true' -o /dev/null
   curl -s 'http://localhost:8081/IntegrationTests/RCTRootViewIntegrationTestApp.bundle?platform=ios&dev=true' -o /dev/null
 }
 
+preloadBundlesRNTester() {
+  # Preload RNTesterApp bundles (packages/rn-tester/)
+  curl -s 'http://localhost:8081/js/RNTesterApp.ios.bundle?platform=ios&dev=true' -o /dev/null
+  curl -s 'http://localhost:8081/js/RNTesterApp.ios.bundle?platform=ios&dev=true&minify=false' -o /dev/null
+}
+
 main() {
-  cd "$ROOT" || exit
+  cd "$ROOT/packages/rn-tester" || exit
 
   # If first argument is "test", actually start the packager and run tests.
   # Otherwise, just build RNTester and exit
@@ -122,13 +127,15 @@ main() {
 
     # Start the WebSocket test server
     echo "Launch WebSocket Server"
-    sh "./IntegrationTests/launchWebSocketServer.sh" &
+    sh "$ROOT/IntegrationTests/launchWebSocketServer.sh" &
     waitForWebSocketServer
 
     # Start the packager
     yarn start --max-workers=1 || echo "Can't start packager automatically" &
     waitForPackager
-    preloadBundles
+    preloadBundlesRNTester
+    # TODO(T149119847)
+    # preloadBundlesRNIntegrationTests
 
     # Build and run tests.
     if [ -x "$(command -v xcbeautify)" ]; then