davidbarral

const updateUserPreference = require("./use-cases/update-user-preference.js");

it("updates the user preference", () => {
  const mockUpdate = jest.fn();
  updateUserPreference({ key: "someKey", value: "someValue", { user: { update: mockUpdate } });
  expect(mockUpdate).toHaveBeenCalledWith(/* the updatedUser */);
});

davidbarral

const updateUserPreference = require("./use-cases/update-user-preference.js");

updateUserPreference({ key: "someKey", value: "someValue" })

davidbarral

const userRepo = require("./repos/user.js");

const defaultRepositories = () => ({ user: userRepo() });

const updateUserPreference = ({ key, value, repositories = defaultRepositories() }) => {
  // Do stuff and updade the user.
  repositories.user.update(updatedUser);
}

davidbarral

const mockUpdate = jest.fn();

jest.mock("./repos/user.js", () => () => ({
  update: mockUpdate;
}));

jest.beforeEach(() => jest.restoreAllMocks());

const updateUserPreference = require("./use-cases/update-user-preference.js");

davidbarral

const updateUserPreference = require("./use-cases/update-user-preference.js");

updateUserPreference({ key: "someKey", value: "someValue" });

davidbarral

const userRepo = require("./repos/user.js");

const updateUserPreference = ({ key, value }) => {
  // Do stuff and updade the user.
  const repo = userRepo();    
  repo.update(updatedUser);
}

davidbarral

const updateUserPreference = require("./use-cases/update-user-preference.js");

it("updates the user preference", () => {
  const mockUpdate = jest.fn();
  const mockRepo = { update: mockUpdate };
  updateUserPreference({ key: "someKey", value: "someValue", { user: mockRepo });        
  expect(mockUpdate).toHaveBeenCalledWith(/* the updatedUser */);
});

davidbarral

const userRepo = require("./repos/user.js");
const updateUserPreference = require("./use-cases/update-user-preference.js");

const user = userRepo();
updateUserPreference({ key: "someKey", value: "someValue", { user });

davidbarral

const updateUserPreference = ({ key, value, repositories }) => {
  // Do stuff and get an updated user
  repositories.user.update(updatedUser);
}

davidbarral

Promise.cancelable = pendingPromise => {
  let lazyCb = null;
  let settled = false;
  let canceled = false;

  const promise = Promise.resolve(pendingPromise).then(() => {
    settled = true;
    if (canceled) {
      return;
    }