Testing Strategy for Production

Build a practical test pyramid covering business logic, integrations and critical user journeys.

Lesson overview

Use unit tests for deterministic business rules, integration tests for real boundaries and a small number of end-to-end tests for critical journeys. Focus coverage on risk, not vanity percentages.

Learning path

Theory → Example → Code → Practice → Quiz → Challenge → Completion

0/6 done

Step 1

Theory

Use unit tests for deterministic business rules, integration tests for real boundaries and a small number of end-to-end tests for critical journeys. Focus coverage on risk, not vanity percentages.

Step 2

Example

Checkout can have many unit tests for pricing, integration tests for persistence and payments, and one end-to-end purchase test.

Step 3

Code

typescript
test("rejects invalid discount", () => {
expect(calculateDiscount({ total: 49 })).toBe(0);
});

Step 4

Practice

Review your current application and apply Testing Strategy for Production. Document the current behavior, one production risk, the change you would make, and how you would verify it.

Step 5

Quiz

1. What is the central production concern in "Testing Strategy for Production"?

Step 6

Challenge

Design a production-ready implementation for Testing Strategy for Production. Include failure handling, security considerations, observability, testing and a rollback or recovery path where applicable.

Complete every stage

Work through every step in order, then the lesson will be marked complete.

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Each chapter and subtopic has its own public URL under /full-stack-to-production.