app_vue2/tests/unit/use/form/useChecker.spec.ts

import UseChecker from "~/use/form/useChecker";
import DataProvider from "~/services/dataProvider/dataProvider";
import VueI18n from "vue-i18n";

jest.mock('~/services/dataProvider/dataProvider');
const DataProviderMock = DataProvider as jest.MockedClass<typeof DataProvider>;
const VueI18nMock = VueI18n as jest.MockedClass<typeof VueI18n>;

describe('useHandleSiret()', () => {

  beforeEach(() => {
    // Efface toutes les instances et les appels au constructeur et à toutes les méthodes :
   DataProviderMock.mockClear();
  });

  it('should init 3 parameters correctly', async () => {
    const siretResponse = UseChecker.useHandleSiret(VueI18nMock.prototype, DataProviderMock.prototype)
    expect(siretResponse.siretErrorMessage.value).toEqual("");
    expect(siretResponse.siretError.value).toBeFalsy();
    expect(siretResponse.checkSiret).toBeDefined();
  })

  it('should update parameters if Siret is correct', async () => {
    const siretResponse = UseChecker.useHandleSiret(VueI18nMock.prototype, DataProviderMock.prototype)
    DataProviderMock.prototype.invoke.mockImplementation(async () => {
      return {isCorrect: true}
    })
    await siretResponse.checkSiret('123456')
    expect(siretResponse.siretErrorMessage.value).toEqual("");
    expect(siretResponse.siretError.value).toBeFalsy();
  })

  it('should update parameters if Siret is not correct', async () => {
    const siretResponse = UseChecker.useHandleSiret(VueI18nMock.prototype, DataProviderMock.prototype)
    DataProviderMock.prototype.invoke.mockImplementation(async () => {
      return {isCorrect: false}
    })
    VueI18nMock.prototype.t = jest.fn().mockReturnValue('siret_error')
    await siretResponse.checkSiret('123456')
    expect(siretResponse.siretErrorMessage.value).toEqual("siret_error");
    expect(siretResponse.siretError.value).toBeTruthy();
  })

  it('should update parameters if there is no response during the check siret', async () => {
    const siretResponse = UseChecker.useHandleSiret(VueI18nMock.prototype, DataProviderMock.prototype)
    DataProviderMock.prototype.invoke.mockImplementation(jest.fn())
    await siretResponse.checkSiret('123456')
    expect(siretResponse.siretErrorMessage.value).toEqual("");
    expect(siretResponse.siretError.value).toBeFalsy();
  })
})