Expect toContain text from a set of values in jest,enzyme with React

Question

My below test works,

let output = mount(story);
      expect(output.text()).toContain('Superman');

But I need to even alllow Batman and Spiderman to pass: I need to check if output.text() has either -> ['Superman','Batman','Spiderman']

Can't do it with

expect(output.text()).toContain(['Superman','Batman','Spiderman']);

output.text() willl contain "Superman is the best" or "Spiderman is the best"

Answer 1

You can add your own matcher instead of toContain.

expect.extend({
  toContainHero(text) {
    let pass = false;
    const heroes = ['Superman','Batman','Spiderman'];
    heroes.forEach((hero) => {
      pass = text.indexOf(hero) !== -1;
    })
    if (pass) {
      return {
        message: () =>
          `expected hero to be found`,
        pass: true,
      };
    } else {
      return {
        message: () => `expected hero to be not found`,
        pass: false,
      };
    }
  },
});

And then do:

expect(output.text()).toContainHero();