feat: replace custom CLI with Jest wrapper (#16)

This pull request fully migrates React Native Harness from a custom CLI to a Jest-based CLI.

Author: V3RON

.github/workflows/e2e-tests.yml

@@ -145,7 +145,7 @@ jobs:
           emulator-options: -no-snapshot-save -no-window -gpu swiftshader_indirect -noaudio -no-boot-anim -camera-back none
           script: |
             adb install -r "./app/build/outputs/apk/debug/app-debug.apk"
-            pnpm nx run @react-native-harness/${{ matrix.app }}:start --args="test android"
+            pnpm nx run @react-native-harness/${{ matrix.app }}:start --args="--harnessRunner android"
 
   e2e-ios:
     name: E2E iOS - ${{ matrix.app }}
@@ -237,4 +237,18 @@ jobs:
 
       - name: Run E2E tests
         run: |
-          pnpm nx run @react-native-harness/${{ matrix.app }}:start --args="test ios"
+          pnpm nx run @react-native-harness/${{ matrix.app }}:start --args="--harnessRunner ios"
+
+      - name: Capture simulator screenshot on failure
+        if: failure()
+        run: |
+          mkdir -p screenshots
+          xcrun simctl io booted screenshot screenshots/ios-failure-${{ matrix.app }}.png
+
+      - name: Upload screenshot artifact
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: ios-failure-screenshot-${{ matrix.app }}
+          path: screenshots/ios-failure-${{ matrix.app }}.png
+          retention-days: 7

apps/playground/rn-harness.config.mjs

@@ -1,7 +1,6 @@
 const config = {
   entryPoint: './src/main.tsx',
   appRegistryComponentName: 'Playground',
-  include: ['./src/__tests__/**/*'],
 
   runners: [
     {

apps/playground/src/__tests__/mocking/modules.harness.ts

@@ -51,19 +51,26 @@ describe('Module mocking', () => {
       // Get the actual react-native module
       const actualRN = requireActual('react-native');
 
-      // Return the actual module but with Platform mocked
-      return {
-        ...actualRN,
-        Platform: {
-          OS: 'mockOS',
-          Version: 999,
-          select: fn().mockImplementation((options: Record<string, any>) => {
-            return options.mockOS || options.default;
-          }),
-          isPad: false,
-          isTesting: true,
-        },
+      // Copy without invoking getters to avoid triggering lazy initialization
+      const proto = Object.getPrototypeOf(actualRN);
+      const descriptors = Object.getOwnPropertyDescriptors(actualRN);
+
+      const mockedRN = Object.create(proto, descriptors);
+      const mockedPlatform = {
+        OS: 'mockOS',
+        Version: 999,
+        select: fn().mockImplementation((options: Record<string, any>) => {
+          return options.mockOS || options.default;
+        }),
+        isPad: false,
+        isTesting: true,
       };
+      Object.defineProperty(mockedRN, 'Platform', {
+        get() {
+          return mockedPlatform;
+        },
+      });
+      return mockedRN;
     };
 
     mock('react-native', mockFactory);

packages/cli/package.json

@@ -24,12 +24,14 @@
     "@react-native-harness/bridge": "workspace:*",
     "@react-native-harness/config": "workspace:*",
     "@react-native-harness/tools": "workspace:*",
-    "commander": "^14.0.0",
-    "glob": "^11.0.0",
     "tslib": "^2.3.0"
   },
   "devDependencies": {
-    "@types/node": "18.16.9"
+    "@types/node": "18.16.9",
+    "jest-cli": "^30.2.0"
+  },
+  "peerDependencies": {
+    "jest-cli": "*"
   },
   "license": "MIT"
 }