feat: declarative integration test suites

.gitignore

@@ -25,6 +25,7 @@ share/python-wheels/
 *.egg-info/
 .installed.cfg
 *.egg
+*.whl
 MANIFEST
 
 # PyInstaller

integration_test/.gcloudignore

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+# .gcloudignore for integration test Cloud Build
+# Include all files needed for the build
+
+# Ignore node_modules as we'll install them fresh
+node_modules/
+generated/
+
+# Ignore local auth files (we'll use secrets instead)
+sa.json
+sa-v2.json
+test-config.json
+
+# Ignore local test artifacts
+test_failures.txt
+*.log
+
+# Keep git info for reference
+.git
+.gitignore
+
+# Ignore temp files
+*.tmp
+*~
+.DS_Store

integration_test/.gitignore

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+node_modules/
+generated/
+.test-artifacts/
+*.log
+.DS_Store
+package-lock.json
+firebase-debug.log
+firebase-functions-python-local.whl

integration_test/README.md

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+# Firebase Functions Python SDK Integration Tests
+
+This directory contains integration tests for the Firebase Functions Python SDK. The framework allows testing Python Firebase Functions by deploying them to real Firebase projects and verifying their behavior through comprehensive test suites.
+
+## Overview
+
+The integration test framework:
+- Generates Python functions from Handlebars templates with unique test IDs
+- Deploys functions to Firebase projects for real-world testing
+- Uses Jest tests to verify function behavior
+- Supports all Firebase trigger types (Firestore, Database, Storage, Auth, etc.)
+
+## Prerequisites
+
+1. **Build the Python SDK**:
+   ```bash
+   # From the root firebase-functions-python directory
+   ./scripts/pack-for-integration-tests.sh
+   ```
+   This creates `integration_test/firebase-functions-python-local.whl`
+
+2. **Firebase Project**: Python SDK only supports 2nd gen Cloud Functions:
+   - **All tests**: `functions-integration-tests-v2`
+   - **Note**: V1/V2 in suite names refers to Firebase service API versions, not Cloud Functions generations
+
+3. **Dependencies**:
+   - Node.js 18+ (for test runner and generation scripts)
+   - Python 3.10+ (for Firebase Functions)
+   - Firebase CLI (`npm install -g firebase-tools`)
+   - uv (Python package manager)
+
+## Quick Start
+
+### 1. Generate Python Functions
+
+```bash
+cd integration_test
+
+# Generate all suites
+npm run generate
+
+# Generate specific test suite
+node scripts/generate.js v2_firestore
+
+# List available suites
+node scripts/generate.js --list
+```
+
+### 2. Deploy Functions
+
+```bash
+npm run deploy
+# OR manually:
+cd generated/functions
+firebase deploy --only functions --project functions-integration-tests-v2
+```
+
+### 3. Run Tests
+
+```bash
+# Run all tests sequentially
+npm run test:all
+
+# Run specific test suite
+npm run test:firestore
+
+# Run tests in parallel (faster but harder to debug)
+npm run test:all:parallel
+```
+
+### 4. Cleanup
+
+```bash
+# Clean up deployed functions
+npm run cleanup
+
+# Remove generated files
+npm run clean
+```
+
+## Project Structure
+
+```
+integration_test/
+├── config/
+│   └── suites.yaml              # Unified test suite configuration
+├── templates/
+│   └── functions/               # Python function templates
+│       ├── firebase.json.hbs
+│       ├── requirements.txt.hbs
+│       └── src/
+│           ├── main.py.hbs
+│           ├── utils.py.hbs
+│           └── v1/v2/           # Trigger-specific templates
+├── scripts/
+│   ├── generate.js              # Function generator
+│   ├── run-tests.js            # Test runner
+│   ├── cleanup-suite.sh        # Cleanup script
+│   └── pack-for-integration-tests.sh  # SDK build script
+├── tests/                       # Jest test suites
+│   ├── v1/                     # V1 function tests
+│   └── v2/                     # V2 function tests
+└── generated/                   # Generated functions (gitignored)
+```
+
+## Configuration
+
+### Suite Configuration (`config/suites.yaml`)
+
+```yaml
+defaults:
+  projectId: functions-integration-tests-v2
+  region: us-central1
+  timeout: 540
+  dependencies:
+    firebase-admin: "^6.0.1"
+    firebase-functions: "{{sdkTarball}}"  # Replaced with wheel path
+  devDependencies: {}
+
+suites:
+  - name: v2_firestore
+    description: "V2 Firestore trigger tests for Python"
+    version: v2
+    service: firestore
+    functions:
+      - name: firestoreOnDocumentCreated
+        trigger: onDocumentCreated
+        document: "v2tests/{testId}"
+```
+
+## How It Works
+
+1. **Template Generation**: The `generate.js` script:
+   - Reads YAML configuration for test suites
+   - Generates Python functions from Handlebars templates
+   - Injects unique `TEST_RUN_ID` for function isolation
+   - Creates `requirements.txt` with local SDK wheel
+
+2. **Function Structure**: Generated Python functions:
+   ```python
+   @firestore_fn.on_document_created(
+       document="tests/{testId}",
+       region="us-central1",
+       timeout_sec=540
+   )
+   def firestoreDocumentOnCreateTests_t24vxpkcr(event):
+       # Store event context for verification
+       test_id = event.params.get("testId")
+       context_data = {
+           "eventId": event.id,
+           "timestamp": event.time,
+           # ... other context
+       }
+       firestore.client().collection("firestoreDocumentOnCreateTests").document(test_id).set(context_data)
+   ```
+
+3. **Test Execution**: Jest tests:
+   - Trigger functions by manipulating Firebase resources
+   - Verify function execution by checking stored context data
+   - Wait for function completion using retry logic
+
+## Adding New Trigger Types
+
+To add support for a new trigger type:
+
+1. **Create Template**: Add template in `templates/functions/src/v1/[service]_tests.py.hbs`
+2. **Update Generator**: Add mapping in `generate.js`:
+   ```javascript
+   const templateMap = {
+     // ... existing mappings
+     newservice: {
+       v1: "functions/src/v1/newservice_tests.py.hbs"
+     }
+   }
+   ```
+3. **Add Configuration**: Update `config/suites.yaml`
+4. **Add Tests**: Create Jest test file in `tests/v1/[service].test.ts`
+
+## Environment Variables
+
+- `TEST_RUN_ID` - Override test run ID (default: auto-generated)
+- `PROJECT_ID` - Override project ID from config
+- `REGION` - Override region from config
+- `SDK_PACKAGE` - Path to SDK wheel file
+
+## Supported Trigger Types
+
+### V1 Functions
+- ✅ Firestore (onCreate, onDelete, onUpdate, onWrite)
+- 🚧 Realtime Database
+- 🚧 Storage
+- 🚧 Auth (blocking and non-blocking)
+- 🚧 Pub/Sub
+- 🚧 Remote Config
+- 🚧 Test Lab
+- 🚧 Task Queues
+
+### V2 Functions
+- 🚧 All V2 trigger types
+
+## Troubleshooting
+
+### Common Issues
+
+1. **SDK not found**: Run `./scripts/pack-for-integration-tests.sh` first
+2. **Import errors**: Ensure virtual environment is activated
+3. **Deployment fails**: Check Firebase project permissions and quotas
+4. **Tests fail**: Verify TEST_RUN_ID matches deployed functions
+5. **Build failures**: Check Cloud Build logs in GCP Console
+6. **Service account permissions**: Ensure service account has necessary permissions
+7. **Project access**: Verify projects exist and are accessible
+
+### Debug Commands
+
+```bash
+# Check generated functions
+ls -la generated/functions/src/
+
+# View function logs for V1
+firebase functions:log --project functions-integration-tests
+
+# View function logs for V2
+firebase functions:log --project functions-integration-tests-v2
+
+# Test locally (limited functionality)
+cd generated/functions
+functions-framework --target=main --debug
+
+# Download artifacts from GCS bucket (V1)
+gsutil ls gs://functions-integration-tests-test-results/
+
+# Download artifacts from GCS bucket (V2)
+gsutil ls gs://functions-integration-tests-v2-test-results/
+```
+
+### Cleanup Issues
+
+If functions aren't cleaned up properly:
+```bash
+# Delete functions
+firebase functions:delete --project functions-integration-tests-v2 --force
+
+# Or use cleanup script
+firebase functions:delete --project functions-integration-tests-v2 --force
+```
+
+## Cloud Build Integration
+
+The integration tests are run via Cloud Build. Python SDK only supports 2nd gen functions, so all tests deploy to the same project.
+
+### Configuration
+
+#### `cloudbuild.yaml`
+- **Project**: `functions-integration-tests-v2`
+- **What it does**:
+  - Builds the Python SDK wheel
+  - Generates Python functions (both v1 and v2 API suites)
+  - Deploys to functions-integration-tests-v2
+  - Runs integration tests
+  - Cleans up deployed functions
+
+**Usage** (from repository root):
+```bash
+gcloud builds submit --config=integration_test/cloudbuild.yaml --project=functions-integration-tests-v2 .
+# Or use npm script:
+npm run cloudbuild
+```
+
+### Configuration Details
+
+#### Build Environment
+- **Machine Type**: `E2_HIGHCPU_8` (for faster builds)
+- **Timeout**: 3600s (1 hour) per configuration
+- **Python Version**: 3.11
+- **Node Version**: 20
+
+#### Build Steps
+
+1. **SDK Build** (Python 3.11 container):
+   - Installs `uv` package manager
+   - Builds wheel from source
+   - Copies to `integration_test/firebase-functions-python-local.whl`
+
+2. **Test Execution** (Node 20 container):
+   - Installs npm dependencies
+   - Installs Firebase CLI
+   - Generates Python functions from templates
+   - Creates Python venv and installs dependencies
+   - Deploys functions to Firebase
+   - Runs Jest integration tests
+   - Cleans up deployed functions
+
+#### Artifacts
+All builds store:
+- Test logs in `integration_test/logs/**/*.log`
+- Metadata in `integration_test/generated/.metadata.json`
+
+Artifacts are uploaded to:
+- V1: `gs://functions-integration-tests-test-results/${BUILD_ID}`
+- V2: `gs://functions-integration-tests-v2-test-results/${BUILD_ID}`
+
+### Automated Triggers
+
+You can set up Cloud Build triggers to run on:
+- **Pull requests**: Use `cloudbuild.yaml` for quick feedback on v1 API tests
+- **Merges to main**: Run full test suite with `cloudbuild.yaml`
+- **Nightly builds**: Run comprehensive tests across all suites
+
+### Manual CI/CD Steps
+
+For custom CI/CD pipelines:
+
+```bash
+# Build SDK
+./scripts/pack-for-integration-tests.sh
+
+# Generate functions (v1 and/or v2 API suites)
+cd integration_test
+node scripts/generate.js 'v1_*'  # Or 'v2_*' or specific suites
+
+# Deploy and test
+cd generated/functions
+python3.11 -m venv venv
+source venv/bin/activate
+pip install -r requirements.txt
+firebase deploy --project functions-integration-tests-v2 --token $FIREBASE_TOKEN
+cd ../..
+npm run test:all:sequential
+npm run cleanup
+```
+
+## Contributing
+
+When adding new features:
+1. Follow the existing template patterns
+2. Ensure Python code follows PEP 8
+3. Test with both local and deployed functions
+4. Update this documentation
+
+## License
+
+Apache 2.0 - See LICENSE file in the root directory.