Julianhm9612

// Method 1
jest.mock('react-query', () => ({
  useMutation: jest.fn()
}));

const mockMutationFn = jest.fn().mockRejectedValue(new Error('Mutation failed'));
(useMutation as jest.Mock).mockReturnValue([mockMutationFn, {}]);

expect(actionCreatorsModal.setIsError).toHaveBeenCalledWith(true, expect.any(Object));

Julianhm9612

// Method 1
const mockData = {
  something: 'value'
};

const mockUseSomething = jest.fn().mockReturnValue({
  data: mockData,
  isLoading: false,
  isSuccess: true,
  refetch: () => mockUseSomething

Julianhm9612

// Method 1
const mockRefetch = jest.fn();

jest.mock('react-query', () => ({
  useQuery: jest.fn().mockReturnValue(({ data: { ...MockData }, isLoading: false, isSuccess: true, refetch: () => mockRefetch }))
}));

// Method 2
const mockRefetch = jest.fn();

Julianhm9612

function sleep (time) {
  return new Promise((resolve) => setTimeout(resolve, time));
}

// Sleep a second
sleep(1000).then(() => {
  // Code to run after     
});

Julianhm9612

const dispatch = jest.fn();
const state = { ... };

render(
  <SomeContext.Provider value={{ state, dispatch }}>
    <Component />
  </SomeContext.Provider>
);

// Call a button or somtheing

Julianhm9612

const setState = jest.fn();
const useStateSpy = jest.spyOn(React, 'useState');
useStateSpy.mockImplementation(() => [init, setState]);

expect(setState).toHaveBeenCalledWith('S');

Julianhm9612

El Zen de Python

Si alguna vez abren la consola de python y escriben import this verán que les aparecerán las líneas con el famoso Zen de Python:

1. Beautiful is better than ugly.
2. Explicit is better than implicit.
3. Simple is better than complex.
4. Complex is better than complicated.
5. Flat is better than nested.
6. Sparse is better than dense.

Julianhm9612

it('Validate the images displayed', () => {
  cy.get('.v-image__image').each(($el) => {
    const image = $el.css('background-image').replace('url("', '').replace('")', '')
    cy.request(image).then((res) => {
      expect(res.status).to.eql(200);
    });
  });
});

it('Validate the images displayed', () => {

Julianhm9612

>>> docker exec -it CONTAINERID /bin/sh
/app # telnet
/bin/sh: telnet: not found

/app # apk update
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
v3.7.0-243-gf26e75a186 [http://dl-cdn.alpinelinux.org/alpine/v3.7/main]
v3.7.0-229-g087f28e29d [http://dl-cdn.alpinelinux.org/alpine/v3.7/community]

Julianhm9612

>>> docker exec -it CONTAINERID /bin/sh
/app # telnet
/bin/sh: telnet: not found

/app # apk update
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/main/x86_64/APKINDEX.tar.gz
fetch http://dl-cdn.alpinelinux.org/alpine/v3.7/community/x86_64/APKINDEX.tar.gz
v3.7.0-243-gf26e75a186 [http://dl-cdn.alpinelinux.org/alpine/v3.7/main]
v3.7.0-229-g087f28e29d [http://dl-cdn.alpinelinux.org/alpine/v3.7/community]