Jest URL.createObjectURL is not a function

Question

I\'m developping a reactJs application. I\'m using jest to test my application. I want to test a function that download a blob.

But unfortunately I receve this error

Answer 1

Since window.URL.createObjectURL is not (yet) available in jest-dom, you need to provide a mock implementation for it.

Don't forget to reset the mock implementation after each test.

describe("your test suite", () => {
  window.URL.createObjectURL = jest.fn();

  afterEach(() => {
    window.URL.createObjectURL.mockReset();
  });

  it("your test case", () => {
    expect(true).toBeTruthy();
  });
});