spec/expectations/containAtLeastOneItemThat.spec.ts
import 'mocha';
import { expect } from '@integration/testing-tools';
import { actorCalled, AssertionError, Question } from '@serenity-js/core';
import { containAtLeastOneItemThat, Ensure, equals, isGreaterThan } from '../../src';
describe('containAtLeastOneItemThat', () => {
it('allows for the actor flow to continue when the "actual" includes at least one item that meets the expectation', () => {
return actorCalled('Astrid').attemptsTo(
Ensure.that([ 0, 1, 2 ], containAtLeastOneItemThat(isGreaterThan(1))),
);
});
it('breaks the actor flow when "actual" does not include at least one item that meets the expectation', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that([ 0, 1, 2 ], containAtLeastOneItemThat(equals(7))),
)).to.be.rejectedWith(AssertionError, `Expected [ 0, 1, 2 ] to contain at least one item that does equal 7`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(7);
expect(error.actual).to.deep.equal([ 0, 1, 2 ]);
});
});
it('breaks the actor flow when "actual" is an empty list', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that([], containAtLeastOneItemThat(equals(42))),
)).to.be.rejectedWith(AssertionError, `Expected [ ] to contain at least one item that does equal 42`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(undefined);
expect(error.actual).to.deep.equal([ ]);
});
});
it('contributes to a human-readable description', () => {
const numbers = () =>
Question.about('list of numbers', actor => [ 0, 1, 2 ]);
expect(Ensure.that(numbers(), containAtLeastOneItemThat(isGreaterThan(1))).toString())
.to.equal(`#actor ensures that list of numbers does contain at least one item that does have value greater than 1`);
});
});