Code QuizIntermediate

Mocking Fetch in a Test

Spot the bug when stubbing global.fetch to return JSON data.

Codejavascript

global.fetch = jest.fn(() =>
  Promise.resolve({
    json: { name: 'Ada' },
  })
);

test('loads user name', async () => {
  const res = await fetch('/user');
  const data = await res.json();
  expect(data.name).toBe('Ada');
});

What is the bug in this fetch mock?

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