Testing Strategies That Prevent Production Bugs
Testing Shopify apps is hard because of the external API. I implemented 'VCR' in our PHPUnit suite to record real API interactions for our test environment.
- API Mocking: Using recorded 'cassettes' ensures our tests run in seconds without hitting Shopify's rate limits.
- Webhook Simulation: I built a CLI tool to "fire" local webhooks with real Shopify payloads to test our logic in development.
- Cypress E2E: We run automated browser tests to ensure our App Bridge components load correctly in the Shopify Admin.