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@serenity-js/assertions
Advanced tools
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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 @serenity-js/assertions
To learn more about Serenity/JS and how to use it on your project, follow the Serenity/JS Getting Started guide.
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)),
)
New features, tutorials, and demos are coming soon! Follow Serenity/JS on LinkedIn, subscribe to Serenity/JS channel on YouTube and join the Serenity/JS Community Chat to stay up to date! Please also make sure to star ⭐️ Serenity/JS on GitHub to help others discover the framework!
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3.14.0 (2023-12-02)
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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