Testing · Senior · Question 63 of 75

How do you mock a class constructor with Vitest/Jest?

vi.mock("./Logger", () => ({
  Logger: vi.fn().mockImplementation(() => ({ log: vi.fn() })),
}));

• ✓Correct answer: Mock the module and return a mock constructor whose instances have mocked methods
• 2Use vi.spyOn(Logger) without a method name
• 3Classes can't be mocked