Set up TanStack Start sample app with tests, CI/CD, and Bluehawk snippet extraction by tmcneil-mdb · Pull Request #101 · mongodb/docs-sample-apps

tmcneil-mdb · 2026-04-27T04:00:27Z

Overview

This PR establishes the complete workflow for the TanStack Start framework example, which serves as the tested source code for the MongoDB TanStack Start tutorial.

This sets up the foundation for maintaining framework examples as living, tested code that automatically generates documentation snippets.

What's Included

🎯 Complete TanStack Start Sample App

Restaurant browsing application demonstrating MongoDB integration
Server-side data fetching with TanStack Start
Client-side caching with TanStack Query
Full-stack TypeScript implementation

🧪 Comprehensive Test Suite (17 tests)

Unit tests (10 tests): Server functions with mocked MongoDB
Integration tests (7 tests): Full-stack queries with real database
Separate Vitest configs for unit vs integration testing
Test utilities following mflix patterns

🔄 CI/CD with GitHub Actions

Automated testing on push/PR to development and frameworks-tanstack branches
Sets up MongoDB using Atlas CLI
Runs both unit and integration tests
Generates test summaries with Vitest reporter

📚 Bluehawk Snippet Extraction

Generic snip.js script for all framework examples (reusable!)
Extracts 8 code snippets from annotated source files
Snippets committed directly to repo (no separate artifact repos)
Automated formatting with Prettier

📖 Documentation

Framework-specific README with tutorial link
Comprehensive test documentation
Component testing status explained (not implemented due to TanStack Start beta)

Key Review Areas

🔍 Please Review:

GitHub Actions Workflow (.github/workflows/run-tanstack-tests.yml)
- Does the CI setup make sense?
- Test reporting working as expected?
Bluehawk Snippet Extraction (frameworks/javascript/snip.js)
- Generic script designed for all framework examples
- Check path resolution and configuration handling
- Verify snippet output in testedSnippets/
- Do we like this pattern?
Test Suite (frameworks/javascript/tanstack/tests/)
- Are the test patterns appropriate?
- Unit vs integration split makes sense?
- Coverage is adequate for a sample app?

How to Test this PR

1.) Run the app locally

cd frameworks/javascript/tanstack/app
npm install
cp .env.example .env
# Add your MONGODB_URI to .env
npm run dev
# Visit http://localhost:3000

2.) Run tests

npm run test:all

Extract snippets

cd frameworks/javascript/tanstack
npm install
npm run snip
# Check testedSnippets/ directory

Files Changed

69 files changed (+9,442 / -252 lines)
New framework example structure in frameworks/javascript/tanstack/
Generic Bluehawk tooling in frameworks/javascript/
CI/CD workflow and test summary script

Testing

All tests passing locally:

cd frameworks/javascript/tanstack/app

npm run test:all       # 17 tests pass (unit + integration)
npm run test:unit      # 10 tests pass (~400ms)
npm run test:integration # 7 tests pass (~2s)

Bluehawk extraction verified:

cd frameworks/javascript/tanstack
npm run snip          # Generates 8 snippets

Known Limitations / Future Work

📌 Version Pinning (TODO - Separate PR)

TanStack Start version should be pinned to prevent breaking changes
Currently using "latest" in package.json
Should freeze to specific version once tutorial is published

🎨 Component Testing

Not implemented due to TanStack Start beta status
Known compatibility issues between TanStack Start plugin and Vitest
Documented in tests/README.md with more information
Will revisit when TanStack Start reaches v1.0

- Set up Bluehawk for snippet extraction from source code - Add generic snip.js script for framework examples - Add processFiles.js for handling unannotated files - Extract 8 code snippets to testedSnippets/ - Add test:all npm script to run both unit and integration tests - Update all READMEs to clarify test commands (test vs test:all) - Document component testing status (not implemented due to TanStack Start beta) - Add Bluehawk annotations to source files (Header, RestaurantList, db, routes)

cbullinger · 2026-04-27T13:07:45Z

@@ -0,0 +1,22 @@
+// :snippet-start: vite-config
+import { defineConfig } from 'vite'


this doesn't match the docs snippet -- we're missing the nitro import and call

cbullinger · 2026-04-27T13:08:22Z

+    "test:watch": "vitest --config vitest.unit.config.ts",
+    "test:coverage": "vitest run --coverage --config vitest.unit.config.ts"
+  },
+  "dependencies": {


we're missing the nitro dependency (assuming we're using it still in the examples like we do in the current docs)

cbullinger · 2026-04-27T13:09:05Z

+
+A full-stack restaurant directory application built with TanStack Start and MongoDB, demonstrating modern React Server Components with database integration.
+
+## 📋 Overview


can we get rid of the emoji in all the READMEs? it's very AI-coded (heh)

cbullinger · 2026-04-27T13:24:09Z

+npm test
+
+# Run only integration tests (requires MongoDB)
+npm run test:integration


I get some failed tests even when connected to an atlas instance with sample data loaded

weird. it worked with a local instance but not my atlas instance

cbullinger · 2026-04-27T13:24:27Z

+
+**Requirements for integration tests:**
+- MongoDB instance (local or Atlas)
+- `sample_restaurants` database loaded (see tutorial)


what tutorial?

cbullinger · 2026-04-27T14:16:34Z

+### What IS Tested?
+
+Our test suite provides comprehensive coverage through:
+
+✅ **Unit Tests (10 tests)**
+- Database connection functions (`connectToDatabase`)
+- Server functions (`getAllRestaurants`, `getRestaurantsByBorough`)
+- Pure TypeScript logic isolated from framework
+
+✅ **Integration Tests (7 tests)**
+- Full application stack (client + server + database)
+- Real MongoDB queries and data fetching
+- End-to-end verification that components receive and display data correctly
+
+**Total: 17 passing tests** providing confidence that the application works correctly.


Suggested change

### What IS Tested?

Our test suite provides comprehensive coverage through:

✅ **Unit Tests (10 tests)**

- Database connection functions (`connectToDatabase`)

- Server functions (`getAllRestaurants`, `getRestaurantsByBorough`)

- Pure TypeScript logic isolated from framework

✅ **Integration Tests (7 tests)**

- Full application stack (client + server + database)

- Real MongoDB queries and data fetching

- End-to-end verification that components receive and display data correctly

**Total: 17 passing tests** providing confidence that the application works correctly.

seems unnecessary since it was just outline earlier

cbullinger · 2026-04-27T14:17:07Z

+## 🎊 Summary
+
+This test suite provides:
+- ✅ 17 comprehensive tests (10 unit + 7 integration)
+- ✅ mflix-quality patterns
+- ✅ Fast execution (~2.4s total)
+- ✅ Environment-aware (skips gracefully without DB)
+- ✅ Ready for CI/CD integration


Suggested change

## 🎊 Summary

This test suite provides:

- ✅ 17 comprehensive tests (10 unit + 7 integration)

- ✅ mflix-quality patterns

- ✅ Fast execution (~2.4s total)

- ✅ Environment-aware (skips gracefully without DB)

- ✅ Ready for CI/CD integration

doesn't seem necessary

cbullinger · 2026-04-27T14:19:15Z

+    'This script requires Bluehawk. Please run "npm install -g bluehawk" in the terminal, and then re-run this script.';
+
+  const result = spawnSync('which', ['bluehawk'], { encoding: 'utf-8' });


i think snip requires a global install. we can change that so Bluehawk resolves from frameworks/javascript/tanstack after npm install

cbullinger · 2026-04-27T15:13:17Z

+      const db = await connectToDatabase();
+      const restaurantsCollection = db.collection('restaurants');
+
+      // Act - Execute the same query as getAllRestaurants()


would be better if we could actually call getAllRestaurants()

cbullinger · 2026-04-27T15:13:52Z

+      const db = await connectToDatabase();
+      const restaurantsCollection = db.collection('restaurants');
+
+      // Act - Execute the same query as getRestaurantsByBorough()


tmcneil-mdb added 3 commits April 23, 2026 17:06

Adding TanStack Start + Unit & Integration Tests

b19747c

Adding GH Actions

3b9ded0

cbullinger requested changes Apr 27, 2026

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Set up TanStack Start sample app with tests, CI/CD, and Bluehawk snippet extraction#101

Set up TanStack Start sample app with tests, CI/CD, and Bluehawk snippet extraction#101
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tmcneil-mdb commented Apr 27, 2026

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		@@ -0,0 +1,22 @@
		// :snippet-start: vite-config
		import { defineConfig } from 'vite'


		A full-stack restaurant directory application built with TanStack Start and MongoDB, demonstrating modern React Server Components with database integration.

		## 📋 Overview

		'This script requires Bluehawk. Please run "npm install -g bluehawk" in the terminal, and then re-run this script.';

		const result = spawnSync('which', ['bluehawk'], { encoding: 'utf-8' });

Conversation

tmcneil-mdb commented Apr 27, 2026

Overview

What's Included

🎯 Complete TanStack Start Sample App

🧪 Comprehensive Test Suite (17 tests)

🔄 CI/CD with GitHub Actions

📚 Bluehawk Snippet Extraction

📖 Documentation

Key Review Areas

🔍 Please Review:

How to Test this PR

Files Changed

Testing

Known Limitations / Future Work

📌 Version Pinning (TODO - Separate PR)

🎨 Component Testing

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