spec/expectations/not.spec.ts
import 'mocha';
import { expect } from '@integration/testing-tools';
import { actorCalled, AssertionError, Expectation } from '@serenity-js/core';
import {
and,
contain,
containAtLeastOneItemThat,
endsWith,
Ensure,
equals,
includes,
isFalse,
isGreaterThan,
isLessThan,
isTrue,
not,
or,
startsWith,
} from '../../src';
describe('not', () => {
it('allows for the actor flow to continue when the "actual" meets the expectation', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that('Hello World!', not(startsWith('¡Hola'))),
)).to.be.fulfilled;
});
it('breaks the actor flow when "actual" does not meet the expectation', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that('Hello World!', not(startsWith('Hello'))),
)).to.be.rejectedWith(AssertionError, `Expected 'Hello World!' to not start with 'Hello'`)
.then((error: AssertionError) => {
expect(error.expected).to.equal('Hello');
expect(error.actual).to.equal('Hello World!');
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that('Hello', not(startsWith('o'))).toString())
.to.equal(`#actor ensures that 'Hello' does not start with 'o'`);
});
it('flips the outcome of an assertion, but doesn\'t hide any errors that might have happened while making it', () => {
const blowsUp = () =>
Expectation.thatActualShould('blow up', 'expected')
.soThat((actual, expected) => {
throw new Error('boom');
});
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that('Hello World!', not(blowsUp())),
)).to.be.rejectedWith(Error, `boom`);
});
describe('double negative', () => {
it('contributes to a human-readable description', () => {
expect(Ensure.that('Hello', not(not(startsWith('o')))).toString())
.to.equal(`#actor ensures that 'Hello' does start with 'o'`);
});
});
describe('when combined with other assertions, such as', () => {
describe('and,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that(3, not(and(isGreaterThan(2), isLessThan(4)))),
)).to.be.rejectedWith(AssertionError, `Expected 3 to not have value greater than 2 and have value that's less than 4`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(4);
expect(error.actual).to.equal(3);
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that(3, not(and(isGreaterThan(2), isLessThan(4)))).toString())
.to.equal(`#actor ensures that 3 does not have value greater than 2 and have value that's less than 4`);
});
});
describe('contains,', () => {
it('produces a sensible error message', () =>
expect(actorCalled('Astrid').attemptsTo(
Ensure.that([ 1, 2, 3 ], not(contain(2))),
)).
to.be.rejectedWith(AssertionError, `Expected [ 1, 2, 3 ] to not contain 2`).
then((error: AssertionError) => {
expect(error.expected).to.equal(2);
expect(error.actual).to.deep.equal([ 1, 2, 3 ]);
})
);
it('contributes to a human-readable description', () => {
expect(Ensure.that([ 'H', 'e', 'l', 'l', 'o' ], not(contain('o'))).toString())
.to.equal(`#actor ensures that [ 'H', 'e', 'l', 'l', 'o' ] does not contain 'o'`);
});
});
describe('containAtLeastOneItemThat,', () => {
it('produces a sensible error message', () =>
expect(actorCalled('Astrid').attemptsTo(
Ensure.that([ 1, 2, 3 ], not(containAtLeastOneItemThat(equals(2)))),
)).
to.be.rejectedWith(AssertionError, `Expected [ 1, 2, 3 ] to not contain at least one item that does equal 2`).
then((error: AssertionError) => {
expect(error.expected).to.equal(2);
expect(error.actual).to.deep.equal([ 1, 2, 3 ]);
})
);
it('contributes to a human-readable description', () => {
expect(Ensure.that([ 'H', 'e', 'l', 'l', 'o' ], not(containAtLeastOneItemThat(equals('o')))).toString())
.to.equal(`#actor ensures that [ 'H', 'e', 'l', 'l', 'o' ] does not contain at least one item that does equal 'o'`);
});
});
describe('endsWith,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that('Hello', not(endsWith('o'))),
)).to.be.rejectedWith(AssertionError, `Expected 'Hello' to not end with 'o'`)
.then((error: AssertionError) => {
expect(error.expected).to.equal('o');
expect(error.actual).to.equal('Hello');
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that('Hello', not(endsWith('o'))).toString())
.to.equal(`#actor ensures that 'Hello' does not end with 'o'`);
});
});
describe('equals,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that(true, not(equals(true))),
)).to.be.rejectedWith(AssertionError, `Expected true to not equal true`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(true);
expect(error.actual).to.equal(true);
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that(true, not(equals(true))).toString())
.to.equal(`#actor ensures that true does not equal true`);
});
});
describe('isTrue,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that(true, not(isTrue())),
)).to.be.rejectedWith(AssertionError, `Expected true to not equal true`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(true);
expect(error.actual).to.equal(true);
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that(true, not(isTrue())).toString())
.to.equal(`#actor ensures that true does not equal true`);
});
});
describe('isFalse,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that(false, not(isFalse())),
)).to.be.rejectedWith(AssertionError, `Expected false to not equal false`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(false);
expect(error.actual).to.equal(false);
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that(false, not(isFalse())).toString())
.to.equal(`#actor ensures that false does not equal false`);
});
});
describe('includes,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that('Hello', not(includes('Hello'))),
)).to.be.rejectedWith(AssertionError, `Expected 'Hello' to not include 'Hello'`)
.then((error: AssertionError) => {
expect(error.expected).to.equal('Hello');
expect(error.actual).to.equal('Hello');
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that('Hello', not(includes('Hello'))).toString())
.to.equal(`#actor ensures that 'Hello' does not include 'Hello'`);
});
});
describe('isGreaterThan,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that(2, not(isGreaterThan(1))),
)).to.be.rejectedWith(AssertionError, `Expected 2 to not have value greater than 1`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(1);
expect(error.actual).to.equal(2);
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that(2, not(isGreaterThan(1))).toString())
.to.equal(`#actor ensures that 2 does not have value greater than 1`);
});
});
describe('isLessThan,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that(1, not(isLessThan(2))),
)).to.be.rejectedWith(AssertionError, `Expected 1 to not have value that's less than 2`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(2);
expect(error.actual).to.equal(1);
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that(1, not(isLessThan(2))).toString())
.to.equal(`#actor ensures that 1 does not have value that's less than 2`);
});
});
describe('or,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that(1, not(or(isGreaterThan(0), isLessThan(2)))),
)).to.be.rejectedWith(AssertionError, `Expected 1 to not have value greater than 0 or have value that's less than 2`)
.then((error: AssertionError) => {
expect(error.expected).to.equal(0);
expect(error.actual).to.equal(1);
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that(1, not(isLessThan(2))).toString())
.to.equal(`#actor ensures that 1 does not have value that's less than 2`);
});
});
describe('startsWith,', () => {
it('produces a sensible error message', () => {
return expect(actorCalled('Astrid').attemptsTo(
Ensure.that('Hello', not(startsWith('H'))),
)).to.be.rejectedWith(AssertionError, `Expected 'Hello' to not start with 'H'`)
.then((error: AssertionError) => {
expect(error.expected).to.equal('H');
expect(error.actual).to.equal('Hello');
});
});
it('contributes to a human-readable description', () => {
expect(Ensure.that('Hello', not(startsWith('H'))).toString())
.to.equal(`#actor ensures that 'Hello' does not start with 'H'`);
});
});
});
});