lesson

Integration Testing

28 / 47

40 minlesson

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1 min read

Integration Testing

Test component interactions and data flow between units. Go beyond isolated unit tests to verify the system works end-to-end.

What You'll Learn

Test component interactions
Data flow between units

Example

class UserService {
  constructor(db) { this.db = db; }
  
  createUser(name) {
    if (!name) throw new Error('Name required');
    const user = { id: Date.now(), name };
// ...

Your Task

Integration test demonstrated

Tips

Integration tests use real dependencies (or high-fidelity mocks)
Verify data flows correctly through multiple components
Balance: unit tests for logic, integration tests for wiring

You completed the free preview — you are ready for the full path.

All lessons are readable below. To write and run code from lesson 11 onwards, upgrade to Path Plus ($9/mo) or Pro.

1 min read

Integration Testing

Test component interactions and data flow between units. Go beyond isolated unit tests to verify the system works end-to-end.

What You'll Learn

Test component interactions
Data flow between units

Example

class UserService {
  constructor(db) { this.db = db; }
  
  createUser(name) {
    if (!name) throw new Error('Name required');
    const user = { id: Date.now(), name };
// ...

Your Task

Integration test demonstrated

Tips

Integration tests use real dependencies (or high-fidelity mocks)
Verify data flows correctly through multiple components
Balance: unit tests for logic, integration tests for wiring

1 min read

Integration Testing

Test component interactions and data flow between units. Go beyond isolated unit tests to verify the system works end-to-end.

What You'll Learn

Test component interactions
Data flow between units

Example

class UserService {
  constructor(db) { this.db = db; }
  
  createUser(name) {
    if (!name) throw new Error('Name required');
    const user = { id: Date.now(), name };
// ...

Your Task

Integration test demonstrated

Tips

Integration tests use real dependencies (or high-fidelity mocks)
Verify data flows correctly through multiple components
Balance: unit tests for logic, integration tests for wiring

1 min read

Integration Testing

Test component interactions and data flow between units. Go beyond isolated unit tests to verify the system works end-to-end.

What You'll Learn

Test component interactions
Data flow between units

Example

class UserService {
  constructor(db) { this.db = db; }
  
  createUser(name) {
    if (!name) throw new Error('Name required');
    const user = { id: Date.now(), name };
// ...

Your Task

Integration test demonstrated

Tips

Integration tests use real dependencies (or high-fidelity mocks)
Verify data flows correctly through multiple components
Balance: unit tests for logic, integration tests for wiring