Complete testing infrastructure with comprehensive UI tests and validation tools

Co-authored-by: kavishdevar <46088622+kavishdevar@users.noreply.github.com>

Author: Copilot

android/TESTING_SUMMARY.md

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+# Testing Infrastructure Summary
+
+## What Was Added
+
+### 1. Test Dependencies
+Added comprehensive testing dependencies to `gradle/libs.versions.toml` and `app/build.gradle.kts`:
+- JUnit 4.13.2 for unit testing
+- AndroidX Test Extensions 1.2.1
+- Espresso 3.6.1 for UI testing
+- MockK 1.13.8 for mocking
+- Robolectric 4.12.2 for Android unit tests
+- Screengrab 2.1.1 for automated screenshots
+
+### 2. Test Structure Created
+```
+app/src/
+├── test/java/me/kavishdevar/librepods/
+│   ├── MockData.kt                 # Mock data providers for testing
+│   ├── MainActivityTest.kt         # Unit tests for MainActivity
+│   └── RootBypassTest.kt          # Tests for bypassing root setup
+└── androidTest/java/me/kavishdevar/librepods/
+    ├── LibrePodsUITest.kt         # UI component tests
+    ├── NavigationTest.kt          # Navigation flow tests
+    └── screenshots/
+        └── ScreenshotTest.kt      # Automated screenshot generation
+```
+
+### 3. Mock Data System
+`MockData.kt` provides various AirPods states for testing:
+- **defaultMockState**: Normal connected state (L:85%, R:90%, Case:75%)
+- **lowBatteryMockState**: Low battery scenario (L:15%, R:20%, Case:5%)
+- **disconnectedMockState**: Disconnected AirPods (all 0%)
+- **oneEarbudOutMockState**: One earbud removed scenario
+
+### 4. Root Setup Bypass Strategy
+The key innovation is bypassing the root requirement for testing:
+
+**Problem**: App requires root access and shows onboarding screen
+**Solution**: Mock `RadareOffsetFinder.isHookOffsetAvailable()` to return `true`
+**Result**: Navigation starts at "settings" instead of "onboarding"
+
+```kotlin
+// In tests
+val radareOffsetFinder = spyk(RadareOffsetFinder(mockContext))
+every { radareOffsetFinder.isHookOffsetAvailable() } returns true
+```
+
+### 5. Fastlane F-Droid Setup
+Complete Fastlane configuration in `android/fastlane/`:
+
+#### Available Commands:
+- `fastlane test` - Run all tests
+- `fastlane debug` - Build debug APK
+- `fastlane fdroid_release` - Build unsigned APK for F-Droid
+- `fastlane screenshots` - Generate automated screenshots
+- `fastlane prepare_fdroid` - Complete F-Droid pipeline
+
+#### F-Droid Metadata:
+- App title, descriptions, and changelogs
+- Automated screenshot generation
+- APK validation for F-Droid compliance
+
+### 6. CI/CD Pipeline
+GitHub Actions workflow (`.github/workflows/android.yml`):
+- Run tests on push/PR
+- Build F-Droid APKs on main branch
+- Generate screenshots with Android emulator
+- Upload artifacts for release
+
+### 7. Screenshot Automation
+`ScreenshotTest.kt` generates F-Droid screenshots:
+- Main settings screen with mock connection status
+- Battery status visualization
+- Noise control options
+- Advanced features toggles
+
+All screenshots use mock data to ensure consistent appearance.
+
+## Key Benefits
+
+1. **No Hardware Required**: All tests use mock data
+2. **No Root Required**: Tests bypass root setup completely
+3. **F-Droid Ready**: Complete automation for F-Droid submission
+4. **CI/CD Integration**: Automated testing and builds
+5. **Screenshot Automation**: Consistent app store screenshots
+
+## Usage
+
+### Running Tests Locally
+```bash
+cd android
+./gradlew test                    # Unit tests
+./gradlew connectedAndroidTest    # Instrumented tests
+```
+
+### F-Droid Preparation
+```bash
+cd android
+fastlane prepare_fdroid
+```
+
+This generates:
+- Unsigned APK at `fastlane/outputs/`
+- Screenshots at `fastlane/metadata/android/en-US/images/`
+- Complete F-Droid metadata
+
+### Testing App Screens Without Root
+The navigation tests demonstrate how to test the actual app functionality:
+
+```kotlin
+// Start at settings instead of onboarding
+NavHost(
+    navController = navController,
+    startDestination = "settings" // Skip onboarding
+) {
+    // Test actual app screens
+}
+```
+
+## Build Troubleshooting
+
+If Gradle build fails:
+1. Check Android SDK is installed
+2. Verify JDK 17 is available
+3. Update Android Gradle Plugin version if needed
+4. Run `./gradlew --refresh-dependencies`
+
+The testing infrastructure is designed to work even in environments where the full app cannot build, by focusing on the test classes and mock data validation.