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@serenity-js/assertions
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@serenity-js/assertions
is an assertions library implementing the Screenplay Pattern.
To install this module, run the following command in your computer terminal:
npm install --save-dev @serenity-js/{core,assertions}
Ensure
import { Ensure, endsWith } from '@serenity-js/assertions';
import { actorCalled } from '@serenity-js/core';
import { Navigate, Page } from '@serenity-js/web';
await actorCalled('Erica').attemptsTo(
Navigate.to('https://serenity-js.org'),
Ensure.that(
Page.current().title(),
endsWith('Serenity/JS')
),
);
Check
import { actorCalled } from '@serenity-js/core';
import { Check } from '@serenity-js/assertions';
import { Click, isVisible } from '@serenity-js/protractor';
await actorCalled('Erica').attemptsTo(
Check.whether(NewsletterModal, isVisible())
.andIfSo(Click.on(CloseModalButton)),
);
Wait
import { actorCalled } from '@serenity-js/core';
import { Click, isVisible, Wait } from '@serenity-js/protractor';
await actorCalled('Erica').attemptsTo(
Wait.until(CloseModalButton, isVisible()),
Click.on(CloseModalButton)
);
Expectation.thatActualShould
import { actorCalled } from '@serenity-js/core';
import { Expectation, Ensure } from '@serenity-js/assertions';
function isDivisibleBy(expected: Answerable<number>): Expectation<number> {
return Expectation.thatActualShould<number, number>('have value divisible by', expected)
.soThat((actualValue, expectedValue) => actualValue % expectedValue === 0);
}
await actorCalled('Erica').attemptsTo(
Ensure.that(4, isDivisibleBy(2)),
);
Expectation.to
import { actorCalled } from '@serenity-js/core';
import { Expectation, Ensure, and, or, isGreaterThan, isLessThan, equals } from '@serenity-js/assertions';
function isWithin(lowerBound: number, upperBound: number) {
return Expectation
.to(`have value within ${ lowerBound } and ${ upperBound }`)
.soThatActual(and(
or(isGreaterThan(lowerBound), equals(lowerBound)),
or(isLessThan(upperBound), equals(upperBound)),
));
}
await actorCalled('Erica').attemptsTo(
Ensure.that(5, isWithin(3, 6)),
);
FAQs
Serenity/JS universal assertion library supporting all types of functional tests, including both web and REST API scenarios
The npm package @serenity-js/assertions receives a total of 10,631 weekly downloads. As such, @serenity-js/assertions popularity was classified as popular.
We found that @serenity-js/assertions demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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