NestJS · Junior · Question 25 of 75

What is the main benefit of dependency injection?

1It removes the need for modules
2It makes TypeScript compile faster
✓Correct answer: Classes don't create their dependencies themselves, so they're easier to replace (e.g. with mocks in tests) and to configure

Explanation

In tests you can override a provider with a fake implementation without changing the class under test.

Further reading

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